{ "bbox": [ -0.65, 51.39, 0.3, 51.72 ], "center": [ -0.118, 51.509 ], "country": "United Kingdom", "defaultZoom": 10, "homeCurrency": "GBP", "id": "london", "lines": [ { "cityId": "london", "color": "#B26300", "displayNumber": "Bakerloo", "id": "london-line-bakerloo", "name": { "en": "Bakerloo line (Kenton ↔ Lambeth North)" }, "phases": [ { "confidence": "low", "constructionStart": "1898", "cost": { "basis": "estimate", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": true, "value": 1615000, "year": 1906 }, "notes": "Estimated construction cost of the original Baker Street & Waterloo Railway (the initial central tube). Roughly £179 million in modern terms per Wikipedia's inflation note. Figure covers the original line, not later extensions. [Citation chase 2026-06-11] This is a contemporary construction estimate reported in The Times (20 April 1899), not an actual outturn cost; the £1,615,000 figure predates the 1906 opening. The underlying primary source could not be independently verified (paywalled, dead Gale link, no archive capture), so the figure rests on the Wikipedia Featured Article alone.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510212145/https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway", "kind": "wikipedia", "quote": "The cost of construction was estimated to be £1,615,000", "tier": "tertiary", "title": "Baker Street and Waterloo Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway" } ] }, "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1906-initial", "kind": "initial", "label": { "en": "Initial opening: Baker Street → Lambeth North (Kennington Road) — Baker Street & Waterloo Railway" }, "notes": "[Date chase 2026-06-12] Construction-start year 1898 corroborated by two independent Wikipedia articles; BS&WR gives 'summer of 1898' and Bakerloo line gives 'June 1898', both citing offline print sources (Lee 1956; Day & Reed 2001). North tunnel boring began February 1899. [Opening-date chase 2026-06-13] The 10 March 1906 'official opening' was also the revenue-service opening day (service from 5:30 am); no separate ceremonial-only date exists.", "opened": "1906-03-10", "segment": { "fromStopIndex": 15, "toStopIndex": 22 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510212145/https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway", "kind": "wikipedia", "quote": "The cost of construction was estimated to be £1,615,000", "tier": "tertiary", "title": "Baker Street and Waterloo Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510212145/https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway", "kind": "wikipedia", "quote": "Construction commenced in the summer of 1898 ... The north tunnel was constructed first, commencing in February 1899.", "tier": "tertiary", "title": "Baker Street and Waterloo Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "the BS&WR's line served nine stations and ran completely underground in a pair of tunnels for 6 kilometres (4 miles) between its northern terminus at Baker Street and its southern terminus at Elephant and Castle", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 8 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1906-elephant-castle", "kind": "extension", "label": { "en": "Extension: Lambeth North → Elephant & Castle" }, "notes": "Elephant & Castle is the line's southern terminus, just beyond the drawn spine (which ends at Lambeth North); mapped to the Lambeth North index.", "opened": "1906-08-05", "segment": { "fromStopIndex": 22, "toStopIndex": 22 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "with Elephant & Castle opening five months later, on 5 August", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1907-marylebone", "kind": "extension", "label": { "en": "Extension: Baker Street → Great Central (now Marylebone)" }, "opened": "1907-03-27", "segment": { "fromStopIndex": 14, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "27 March 1907: Great Central station (later Marylebone) opened. 1 new station.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1907-edgware-road", "kind": "extension", "label": { "en": "Extension: Marylebone → Edgware Road" }, "opened": "1907-06-15", "segment": { "fromStopIndex": 13, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "15 June 1907: Edgware Road station opened. 1 new station.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1913-paddington", "kind": "extension", "label": { "en": "Extension: Edgware Road → Paddington" }, "opened": "1913-12-01", "segment": { "fromStopIndex": 12, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510212145/https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway", "kind": "wikipedia", "quote": "The extension opened on 1 December 1913, with the single new station at Paddington.", "tier": "tertiary", "title": "Baker Street and Waterloo Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1915-queens-park", "kind": "extension", "label": { "en": "Extension: Paddington → Queen's Park (Warwick Avenue, Kilburn Park, Queen's Park)" }, "notes": "Warwick Avenue and Kilburn Park opened 31 January 1915; Queen's Park opened 11 February 1915 (next phase). Maida Vale, an infill on this section, opened 6 June 1915 (separate phase). [Opening-date chase 2026-06-13] This phase covers only Warwick Avenue and Kilburn Park (opened 31 Jan 1915); the Queen's Park terminus itself opened later, on 11 Feb 1915 (next phase).", "opened": "1915-01-31", "segment": { "fromStopIndex": 8, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "31 January 1915: Kilburn Park and Warwick Avenue stations opened. 2 new stations.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1915-queens-park-terminus", "kind": "extension", "label": { "en": "Extension opens at terminus: Queen's Park" }, "opened": "1915-02-11", "segment": { "fromStopIndex": 8, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "11 February 1915: Queen's Park station opened. 1 new station.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1915-willesden-junction", "kind": "extension", "label": { "en": "Extension: Queen's Park → Willesden Junction (joint running onto LNWR Watford DC line)" }, "notes": "Bakerloo services extended over new LNWR tracks to Willesden Junction; the LNWR had built the Willesden–Watford line and intermediate stations 1912–1913.", "opened": "1915-05-10", "segment": { "fromStopIndex": 6, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510212145/https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway", "kind": "wikipedia", "quote": "On 10 May 1915, when Bakerloo Tube services were extended ... to Willesden Junction", "tier": "tertiary", "title": "Baker Street and Waterloo Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1915-maida-vale", "kind": "extension", "label": { "en": "Infill station opens: Maida Vale" }, "opened": "1915-06-06", "segment": { "fromStopIndex": 10, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "6 June 1915: Maida Vale station opened. 1 new station.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1916-kensal-green", "kind": "extension", "label": { "en": "Infill station opens: Kensal Green" }, "opened": "1916-10-01", "segment": { "fromStopIndex": 7, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "1 October 1916: Kensal Green station opened. 1 new station.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1917-watford-junction", "kind": "extension", "label": { "en": "Extension: Willesden Junction → Watford Junction (over LNWR/Watford DC line)" }, "notes": "Bakerloo tube service extended over LNWR DC tracks to Watford Junction (Harlesden, Stonebridge Park, North Wembley, Wembley Central, Kenton, Harrow & Wealdstone and beyond). Stations beyond Harrow & Wealdstone toward Watford are not on the drawn spine; mapped to the on-spine Willesden Junction→Kenton portion.", "opened": "1917-04-16", "segment": { "fromStopIndex": 0, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510212145/https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway", "kind": "wikipedia", "quote": "On 16 April 1917, the tube service was extended to Watford Junction.", "tier": "tertiary", "title": "Baker Street and Waterloo Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "Between 1917 and 1982, Bakerloo line trains continued along the DC line past Harrow & Wealdstone to Watford Junction.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 8 }, { "confidence": "low", "geometryRef": null, "id": "london-bakerloo-1939-stanmore-takeover", "kind": "extension", "label": { "en": "Stanmore branch takeover from Metropolitan line: new Baker Street → Finchley Road tube tunnels (St John's Wood, Swiss Cottage) onward to Stanmore" }, "notes": "On the Baker Street–Finchley Road–Stanmore branch (transferred to the Jubilee line in 1979), not on the drawn Bakerloo spine. Replaced three Metropolitan stations (Lord's, Marlborough Road, Swiss Cottage) with two new Bakerloo stations (St John's Wood, Swiss Cottage).", "opened": "1939-11-20", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "The Bakerloo line took over the Metropolitan line's service to Stanmore on 20 November 1939.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "the replacement of three Metropolitan line stations (Lord's, Marlborough Road and Swiss Cottage) between those points with two new Bakerloo line stations (St John's Wood and Swiss Cottage)", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 2 }, { "closed": "1979-05-01", "confidence": "low", "geometryRef": null, "id": "london-bakerloo-1979-stanmore-transfer", "kind": "renumber", "label": { "en": "Stanmore branch (Baker Street → Stanmore) transferred from Bakerloo to the new Jubilee line" }, "notes": "Not a closure: the Stanmore branch and the St John's Wood/Swiss Cottage tube section were reassigned from the Bakerloo to the newly created Jubilee line on 1 May 1979. Off the drawn Bakerloo spine.", "opened": "1979-05-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "The branch remained part of the Bakerloo line until 1 May 1979, when similar congestion problems for the Bakerloo line caused by two branches converging at Baker Street led to the creation of the Jubilee line.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ] }, { "closed": "1982", "confidence": "low", "geometryRef": null, "id": "london-bakerloo-1982-stonebridge-cutback", "kind": "renumber", "label": { "en": "Northern service cut back: Watford Junction → Stonebridge Park (Bakerloo withdrawn beyond Stonebridge Park)" }, "notes": "Service reduction, not a line closure: Bakerloo trains were cut back to Stonebridge Park in 1982. The withdrawn section beyond is off the drawn spine. [Opening-date chase 2026-06-13] Cutback beyond Stonebridge Park took effect 24 September 1982 (service withdrawn at Harrow & Wealdstone and stations beyond), part of the fallout from cancellation of the GLC Fares Fair subsidy.", "opened": "1982", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "Bakerloo services to Watford Junction were reduced in the 1960s and cut back in 1982 to Stonebridge Park.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ] }, { "confidence": "low", "geometryRef": null, "id": "london-bakerloo-1984-harrow-restored", "kind": "reopening", "label": { "en": "Northern service restored: Stonebridge Park → Harrow & Wealdstone (present all-day service)" }, "notes": "Service to Harrow & Wealdstone gradually restored from 1984; present all-day service from 1989. Harrow & Wealdstone lies beyond Kenton, off the drawn spine. Service restoration over existing shared DC-line track, not new construction. [Opening-date chase 2026-06-13] Service to Harrow & Wealdstone was restored 4 June 1984, but as a peak-hours-only service; the present all-day service was not instituted until 1989, so the phase label's 'present all-day service' wording is slightly imprecise for the 1984 date.", "opened": "1984", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "Services as far as Harrow & Wealdstone were gradually restored from 1984, and in 1989 the present all-day service was instituted.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510212145/https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway", "kind": "wikipedia", "tier": "tertiary", "title": "Baker Street and Waterloo Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway" } ] }, { "cityId": "london", "color": "#DC241F", "displayNumber": "Central", "id": "london-line-central", "name": { "en": "Central line (Ruislip Gardens ↔ Theydon Bois)" }, "phases": [ { "confidence": "low", "constructionStart": "1896", "cost": { "basis": "budget", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": false, "value": 2544000, "year": 1900 }, "notes": "Construction contract figure for the original Shepherd's Bush–Bank line; the Electric Traction Company Ltd (ETCL) contract was £2,544,000 plus £700,000 in 4% debenture stock. Figure covers the original tube line only. [Citation chase 2026-06-11] The £2,544,000 is the ETCL construction contract price agreed 22 March 1894 (not the 1900 opening-year outturn); the value rests on a single Wikipedia statement sourced to one offline specialist book (Bruce & Croome, The Central Line, 2006, p.5) that could not be independently verified.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260413105648/https://en.wikipedia.org/wiki/Central_London_Railway", "kind": "wikipedia", "quote": "£2,544,000 (approximately £286 million today) plus £700,000 in 4 per cent debenture stock", "tier": "secondary", "title": "Central London Railway — Wikipedia (cost)", "url": "https://en.wikipedia.org/wiki/Central_London_Railway" } ] }, "geometryRef": "london-Central", "id": "london-central-1900-twopenny-tube", "kind": "initial", "label": { "en": "Central London Railway opens: Shepherd's Bush → Bank (the 'Twopenny Tube')" }, "notes": "[Date chase 2026-06-12] Construction-start year 1896 corroborated by Central London Railway article (Badsey-Ellis 2005, p.6): demolition April 1896, shafts Aug-Sep 1896. [Opening-date chase 2026-06-13] Ceremonial opening by the Prince of Wales was 27 June 1900 (one day before the 1899 Act time limit); public/revenue service began 30 July 1900 — the curated date. The work-unit's '30 June' in the source quote appears to be a transcription error.", "opened": "1900-07-30", "segment": { "fromStopIndex": 9, "toStopIndex": 21 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260413105648/https://en.wikipedia.org/wiki/Central_London_Railway", "kind": "wikipedia", "quote": "The line between Shepherd's Bush and Bank was formally opened on 30 June 1900, public services beginning on 30 July.", "tier": "secondary", "title": "Central London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_London_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260413105648/https://en.wikipedia.org/wiki/Central_London_Railway", "kind": "wikipedia", "quote": "£2,544,000 (approximately £286 million today) plus £700,000 in 4 per cent debenture stock", "tier": "secondary", "title": "Central London Railway — Wikipedia (cost)", "url": "https://en.wikipedia.org/wiki/Central_London_Railway" } ], "stationCount": 13 }, { "confidence": "low", "constructionStart": "1907", "geometryRef": null, "id": "london-central-1908-wood-lane", "kind": "extension", "label": { "en": "Wood Lane loop opens (single-platform exhibition loop west of Shepherd's Bush, for the 1908 Franco-British Exhibition)" }, "notes": "The exhibition loop / Wood Lane (Central) terminus west of Shepherd's Bush is not on the drawn spine. [Date chase 2026-06-12] Wood Lane construction-start year 1907 corroborated by Central London Railway article (Badsey-Ellis 2005, p.20): exhibition-site work began January 1907.", "opened": "1908-05-14", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260413105648/https://en.wikipedia.org/wiki/Central_London_Railway", "kind": "wikipedia", "quote": "The line was extended westwards with a loop serving a single platform at Wood Lane for the 1908 Franco-British Exhibition.", "tier": "secondary", "title": "Central London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_London_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "Wood Lane (1 station)... Opening: 14 May 1908", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia (Wood Lane date)", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" } ], "stationCount": 1 }, { "confidence": "low", "constructionStart": "1910", "geometryRef": "london-Central", "id": "london-central-1912-liverpool-street", "kind": "extension", "label": { "en": "Eastern extension opens: Bank → Liverpool Street (first London Underground station built with escalators)" }, "notes": "[Date chase 2026-06-12] Liverpool Street construction-start year 1910 corroborated by Central London Railway article (Badsey-Ellis 2005, p.22): construction started July 1910.", "opened": "1912-07-28", "segment": { "fromStopIndex": 21, "toStopIndex": 22 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260413105648/https://en.wikipedia.org/wiki/Central_London_Railway", "kind": "wikipedia", "quote": "Opening: 28 July 1912... Route Segment: Bank to Liverpool Street... Construction started in July 1910", "tier": "secondary", "title": "Central London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_London_Railway" } ], "stationCount": 1 }, { "confidence": "low", "constructionStart": "1912", "geometryRef": "london-Central", "id": "london-central-1920-ealing-broadway", "kind": "extension", "label": { "en": "Western extension opens: Wood Lane → Ealing Broadway (over the GWR/E&SBR line; East Acton new tube station)" }, "notes": "Mapped to the Ealing Broadway branch sub-spine at East Acton (index 2), the new tube station opened by this phase; the Ealing Broadway terminus itself lies just beyond the branch's drawn end. [Date chase 2026-06-12] Ealing Broadway construction-start year 1912 explicitly supported by Central line (London Underground) article, citing Croome & Jackson 1993, p.119. The detailed CLR article is silent on the 1912 start but does not contradict it (E&SBR freight line opened 1917; CLR electric services began 3 Aug 1920). [Opening-date chase 2026-06-13] Opening was postponed until after WWI; East Acton opened as a single intermediate station the same day.", "opened": "1920-08-03", "segment": { "fromStopIndex": 6, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260413105648/https://en.wikipedia.org/wiki/Central_London_Railway", "kind": "wikipedia", "quote": "Opening: 3 August 1920... New station: East Acton (1 station)", "tier": "secondary", "title": "Central London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_London_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "The rolling stock returned when the extension opened in 1920.", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Central#2", "id": "london-central-1923-acton-infill", "kind": "extension", "label": { "en": "Infill stations open on the Ealing extension: North Acton & West Acton" }, "notes": "Mapped to the Ealing Broadway branch sub-spine: West Acton (index 0) and North Acton (index 1).", "opened": "1923-11-05", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260413105648/https://en.wikipedia.org/wiki/Central_London_Railway", "kind": "wikipedia", "quote": "Opening: 5 November 1923... New Stations: North Acton and West Acton (2 stations on Ealing extension)", "tier": "secondary", "title": "Central London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_London_Railway" } ], "stationCount": 2 }, { "confidence": "low", "constructionStart": "1936", "geometryRef": "london-Central", "id": "london-central-1946-stratford", "kind": "extension", "label": { "en": "New Works Programme eastern extension opens: Liverpool Street → Stratford (new tube tunnels)" }, "notes": "A placeholder cost was dropped on review (no real per-line build cost was sourced for the New Works Programme segments). [Date chase 2026-06-12] 1936 construction-start unverifiable from Wikipedia: the programme is dated '1935-40' and eastern-extension tunnels were largely built by 1940 (consistent with a mid-1930s start), but no accessible source pins the specific year. The dedicated 1935-40 New Works Programme article is currently 404. Year not contradicted.", "opened": "1946-12-04", "segment": { "fromStopIndex": 22, "toStopIndex": 25 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "The eastern extension opened as far as Stratford in December 1946, with trains continuing without passengers to reverse in the cutting south of Leyton.", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260411131433/https://en.wikipedia.org/wiki/Stratford_station", "kind": "wikipedia", "quote": "London Underground Central line services started on 4 December 1946, extended from Liverpool Street station in new tunnels after being delayed due to the Second World War.", "tier": "secondary", "title": "Stratford station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Stratford_station" } ], "stationCount": 4 }, { "confidence": "medium", "geometryRef": "london-Central", "id": "london-central-1947-leytonstone", "kind": "extension", "label": { "en": "Eastern extension opens: Stratford → Leytonstone (Leyton, Leytonstone; over former LNER/GER line)" }, "opened": "1947-05-05", "segment": { "fromStopIndex": 25, "toStopIndex": 27 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "In 1947, the line opened to Leytonstone, and then Woodford and Newbury Park.", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20241005083256/https://tubehistory.uk/central-line.php", "kind": "other", "quote": "Leyton and Leytonstone were first served on May 5, 1947.", "tier": "tertiary", "title": "Central line — Tube History", "url": "https://www.tubehistory.uk/central-line.php" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260611122854/https://en.wikipedia.org/wiki/Hainault_Loop", "kind": "other", "publisher": "Wikipedia", "quote": "Leytonstone, opened 22 August 1856 by the ECR, closed briefly, re-opening 5 May 1947.", "tier": "secondary", "title": "Hainault Loop — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hainault_Loop", "via": "https://en.wikipedia.org/wiki/Hainault_Loop" } ], "stationCount": 2 }, { "confidence": "low", "constructionStart": "1936", "geometryRef": "london-Central", "id": "london-central-1947-greenford", "kind": "extension", "label": { "en": "New Works Programme western extension opens: North Acton → Greenford (over the GWR Acton–Northolt line; Hanger Lane, Perivale, Greenford)" }, "notes": "[Date chase 2026-06-12] 1936 construction-start unverifiable from Wikipedia: western extension was part of the '1935-40' programme and opened to Greenford 30 June 1947 after WWII delay, but no accessible source states the specific construction-start year. The dedicated 1935-40 New Works Programme article is currently 404. Year not contradicted.", "opened": "1947-06-30", "segment": { "fromStopIndex": 3, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "the western extension opened as far as Greenford in 1947", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260212041025/https://en.wikipedia.org/wiki/Greenford_station", "kind": "wikipedia", "quote": "the first section of the western extension opened from North Acton to Greenford on 30 June 1947", "tier": "secondary", "title": "Greenford station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Greenford_station" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": "london-Central#2", "id": "london-central-1947-newbury-park-woodford", "kind": "extension", "label": { "en": "Eastern extension opens: Leytonstone → Newbury Park (Wanstead, Redbridge, Gants Hill, Newbury Park) and Leytonstone → Woodford (Snaresbrook, South Woodford, Woodford)" }, "notes": "The Leytonstone→Woodford section (Snaresbrook, South Woodford, Woodford) is on the spine and mapped here; the Leytonstone→Newbury Park stations (Wanstead, Redbridge, Gants Hill, Newbury Park) are on the off-spine Hainault loop and not drawn.", "opened": "1947-12-14", "segment": { "fromStopIndex": 22, "toStopIndex": 26 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611122854/https://en.wikipedia.org/wiki/Hainault_Loop", "kind": "wikipedia", "quote": "Leytonstone to Newbury Park (new tube tunnels): opened by LTE 14 December 1947 - Three intermediate stations (Gants Hill, Redbridge, Wanstead)", "tier": "secondary", "title": "Hainault Loop — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hainault_Loop" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260204232354/https://en.wikipedia.org/wiki/Woodford_tube_station", "kind": "wikipedia", "quote": "transfer to the London Passenger Transport Board (LPTB) on 14 December 1947 as part of the extension of the Central Line", "tier": "secondary", "title": "Woodford tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Woodford_tube_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161818/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "other", "publisher": "Wikipedia", "quote": "[Station table records {{dts|format=dmy|1947|12|14}} for 7 stations: Snaresbrook, South Woodford, Woodford, Wanstead, Redbridge, Gants Hill, Newbury Park]", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "via": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" } ], "stationCount": 7 }, { "confidence": "medium", "geometryRef": "london-Central#2", "id": "london-central-1948-hainault-south", "kind": "extension", "label": { "en": "Hainault loop opens (south): Newbury Park → Hainault (Barkingside, Fairlop, Hainault; former LNER line, electrified)" }, "notes": "Mapped to the Ealing-to-Hainault branch sub-spine: Newbury Park (index 26), Barkingside (27), Fairlop (28); Hainault itself is the branch terminus just beyond the drawn end.", "opened": "1948-05-31", "segment": { "fromStopIndex": 26, "toStopIndex": 28 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611122854/https://en.wikipedia.org/wiki/Hainault_Loop", "kind": "wikipedia", "quote": "Hainault: 're-opening 31 May 1948'... Fairlop: 're-opening 31 May 1948'... Barkingside: 're-opening 31 May 1948'", "tier": "secondary", "title": "Hainault Loop — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hainault_Loop" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161818/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "other", "publisher": "Wikipedia", "quote": "[Station table records {{dts|format=dmy|1948|5|31}} for Barkingside, Fairlop, and Hainault]", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "via": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": "london-Central#3", "id": "london-central-1948-loughton", "kind": "extension", "label": { "en": "Hainault loop opens (north) and Woodford → Loughton: Hainault → Woodford (Grange Hill, Chigwell, Roding Valley) plus Buckhurst Hill, Loughton (former LNER line, electrified)" }, "notes": "The Woodford→Loughton stations (Buckhurst Hill, Loughton) are on the spine and mapped here; the northern Hainault loop stations (Grange Hill, Chigwell, Roding Valley) are off-spine.", "opened": "1948-11-21", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611122854/https://en.wikipedia.org/wiki/Hainault_Loop", "kind": "wikipedia", "quote": "Grange Hill: 're-opening 21 November 1948'... Chigwell: 're-opening 21 November 1948'... Roding Valley: 're-opening 21 November 1948'", "tier": "secondary", "title": "Hainault Loop — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hainault_Loop" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20250816142934/https://railtransportinlondon.fandom.com/wiki/London_Underground_Central_Line", "kind": "other", "quote": "Electric services commenced as far as Loughton (and around the 'loop' to Hainault) on 21 November 1948.", "tier": "tertiary", "title": "London Underground Central Line — RailTransportinLondon Wiki", "url": "https://railtransportinlondon.fandom.com/wiki/London_Underground_Central_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161818/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "other", "publisher": "Wikipedia", "quote": "[Station table records {{dts|format=dmy|1948|11|21}} for Roding Valley, Chigwell, Grange Hill, Hainault (north side) and Buckhurst Hill, Loughton]", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "via": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" } ], "stationCount": 5 }, { "confidence": "low", "geometryRef": "london-Central", "id": "london-central-1948-west-ruislip", "kind": "extension", "label": { "en": "Western extension completed: Greenford → West Ruislip (Northolt, South Ruislip, Ruislip Gardens, West Ruislip; over the GWR Acton–Northolt line)" }, "notes": "West Ruislip is the spine's western terminus (index 0); Ruislip Gardens, South Ruislip and Northolt are indices 0–2 here, with Greenford at index 3.", "opened": "1948-11-21", "segment": { "fromStopIndex": 0, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260215054034/https://en.wikipedia.org/wiki/West_Ruislip_station", "kind": "wikipedia", "quote": "Central line services began running from West Ruislip on 21 November 1948.", "tier": "secondary", "title": "West Ruislip station — Wikipedia", "url": "https://en.wikipedia.org/wiki/West_Ruislip_station" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "and West Ruislip in 1948.", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" } ], "stationCount": 4 }, { "confidence": "low", "geometryRef": "london-Central", "id": "london-central-1949-epping", "kind": "extension", "label": { "en": "Eastern extension completed: Loughton → Epping (Debden, Theydon Bois, Epping; former LNER line, electrified)" }, "notes": "Debden (33) and Theydon Bois (34) are on the spine; Epping (the terminus) lies just beyond the drawn spine. [Opening-date chase 2026-06-13] This phase reflects Central line taking over GER/BR steam-worked services to Epping (and onward to Ongar, then still steam-worked); the Epping–Ongar branch was not electrified until 1957.", "opened": "1949-09-25", "segment": { "fromStopIndex": 27, "toStopIndex": 34 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "The extension transferred to London Underground management in 1949, when Epping began to be served by Central line trains.", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260130183315/https://en.wikipedia.org/wiki/Epping_tube_station", "kind": "wikipedia", "quote": "Debden, Theydon Bois, and Epping first served September 25, 1949", "tier": "secondary", "title": "Epping tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Epping_tube_station" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": null, "id": "london-central-1957-ongar", "kind": "extension", "label": { "en": "Epping → Ongar branch electrified, replacing steam shuttle (North Weald, Blake Hall, Ongar)" }, "notes": "The Epping→Ongar branch is beyond Epping, off the drawn spine (and now closed).", "opened": "1957-11-18", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "The single-track section from Epping to Ongar was electrified in 1957 and then operated as a shuttle service using short tube trains.", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260531165156/https://en.wikipedia.org/wiki/Epping_Ongar_Railway", "kind": "wikipedia", "quote": "The line was electrified on 18 November 1957, when electric trains took over from steam.", "tier": "secondary", "title": "Epping Ongar Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Epping_Ongar_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260507191339/https://en.wikipedia.org/wiki/Ongar_railway_station", "kind": "other", "publisher": "Wikipedia", "quote": "The service was operated by British Railways for the Underground until 18 November 1957, when the line was electrified and electric trains took over from steam.", "tier": "secondary", "title": "Ongar railway station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Ongar_railway_station", "via": "https://en.wikipedia.org/wiki/Ongar_railway_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260515170657/https://en.wikipedia.org/wiki/North_Weald_railway_station", "kind": "other", "publisher": "Wikipedia", "quote": "Key dates: 18 November 1957 — Line electrified. Steam locomotives operated services from 1949 to 1957, after which the track was electrified and taken over by the Central line.", "tier": "secondary", "title": "North Weald railway station — Wikipedia", "url": "https://en.wikipedia.org/wiki/North_Weald_railway_station", "via": "https://en.wikipedia.org/wiki/North_Weald_railway_station" } ], "stationCount": 3 }, { "closed": "1994-09-30", "confidence": "low", "geometryRef": null, "id": "london-central-1994-ongar-closes", "kind": "reopening", "label": { "en": "Epping → Ongar branch closes (loss-making shuttle; now the heritage Epping Ongar Railway)" }, "notes": "The Epping→Ongar branch (off the drawn spine) closed in 1994 and is now the heritage Epping Ongar Railway. [Opening-date chase 2026-06-13] Branch closed 30 September 1994 (losing money, ~100 passengers/day); now the heritage Epping Ongar Railway.", "opened": "1957-11-18", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "However, carrying only 100 passengers a day and losing money, the section closed in 1994, and is now used by the heritage Epping Ongar Railway.", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260531165156/https://en.wikipedia.org/wiki/Epping_Ongar_Railway", "kind": "wikipedia", "quote": "On 30 September 1994, the line was closed.", "tier": "secondary", "title": "Epping Ongar Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Epping_Ongar_Railway" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260413105648/https://en.wikipedia.org/wiki/Central_London_Railway", "kind": "wikipedia", "tier": "secondary", "title": "Central London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_London_Railway" } ] }, { "cityId": "london", "color": "#FFD300", "displayNumber": "Circle", "id": "london-line-circle", "name": { "en": "Circle line (Goldhawk Road ↔ Paddington spiral)" }, "phases": [ { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": false, "value": 1300000, "year": 1862 }, "notes": "Cost of the original 3.75-mile Metropolitan Railway (Paddington–Farringdon), not the whole later Circle; work completed end of 1862.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "The 3.75-mile (6 km) railway opened to the public on 10 January 1863 ... By the end of 1862, work was complete at a cost of £1.3 million.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, "geometryRef": "london-Circle", "id": "london-circle-1863-paddington-farringdon", "kind": "initial", "label": { "en": "Metropolitan Railway opens: Paddington (Bishop's Road) → Farringdon Street (world's first underground railway; western/northern arc of the future Inner Circle)" }, "opened": "1863-01-10", "segment": { "fromStopIndex": 7, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "The 3.75-mile (6 km) railway opened to the public on 10 January 1863 ... By the end of 1862, work was complete at a cost of £1.3 million.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123126/https://en.wikipedia.org/wiki/Inner_Circle_(London_Underground)", "kind": "wikipedia", "quote": "In 1863, the Metropolitan Railway, the world's first underground railway, opened in London between Paddington and Farringdon", "tier": "tertiary", "title": "Inner Circle (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Inner_Circle_(London_Underground)" } ] }, { "confidence": "medium", "geometryRef": "london-Circle", "id": "london-circle-1865-moorgate", "kind": "extension", "label": { "en": "Metropolitan Railway extension: Farringdon Street → Moorgate Street (via Aldersgate Street)" }, "opened": "1865-12-23", "segment": { "fromStopIndex": 13, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "The extension to Aldersgate Street and Moorgate Street (now Barbican and Moorgate) had opened on 23 December 1865", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/circle.html", "kind": "other", "quote": "Moorgate to Farringdon opened ... 1865-12-23", "tier": "secondary", "title": "CULG — Circle Line", "url": "https://www.davros.org/rail/culg/circle.html" } ] }, { "confidence": "medium", "geometryRef": "london-Circle", "id": "london-circle-1868-high-street-kensington", "kind": "extension", "label": { "en": "Metropolitan District Railway opens western/southern arc: South Kensington / Gloucester Road → High Street Kensington (and Praed Street Junction connection to the Met)" }, "notes": "Opening was contested in research; settled by tiebreaker.", "opened": "1868-10-01", "segment": { "fromStopIndex": 29, "toStopIndex": 31 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/circle.html", "kind": "other", "quote": "[Praed Street Junction] to Gloucester Road via High Street Kensington opened ... 1868-10-01", "tier": "secondary", "title": "CULG — Circle Line", "url": "https://www.davros.org/rail/culg/circle.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "The first section of the Met extension opened to Brompton (Gloucester Road) (now Gloucester Road) on 1 October 1868, with stations at Paddington (Praed Street), Bayswater, Notting Hill Gate, and Kensington (High Street) (now High Street Kensington).", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Circle_line_(London_Underground)" } ] }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": false, "value": 3000000, "year": 1868 }, "notes": "Cost of the first District section (South Kensington–Westminster) only — described as almost three times the cost of the Met's original, longer line; not the whole Inner Circle. [Citation chase 2026-06-11] The £3M is a round, retrospective figure from secondary railway histories (Wolmar 2004 p.72; Horne 2006 pp.7–8); both underlying book citations are offline/print and could not be independently verified, and no primary/contemporary source was found.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "On 24 December 1868, the District opened its line from South Kensington to Westminster ... the cost of the first section of the District from South Kensington to Westminster was £3 million, almost three times the cost of the Met's original, longer line", "tier": "tertiary", "title": "Metropolitan District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ] }, "geometryRef": "london-Circle", "id": "london-circle-1868-westminster", "kind": "extension", "label": { "en": "Metropolitan District Railway opens: South Kensington → Westminster (first District section of the Inner Circle)" }, "opened": "1868-12-24", "segment": { "fromStopIndex": 25, "toStopIndex": 29 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "On 24 December 1868, the District opened its line from South Kensington to Westminster ... the cost of the first section of the District from South Kensington to Westminster was £3 million, almost three times the cost of the Met's original, longer line", "tier": "tertiary", "title": "Metropolitan District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "On 24 December 1868, the District opened its line from South Kensington to Westminster, with stations at South Kensington, Sloane Square, Victoria, St James's Park and Westminster Bridge (now Westminster), the Met extending eastwards from Brompton to a shared station at South Kensington on the same day.", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Circle_line_(London_Underground)" } ] }, { "confidence": "medium", "geometryRef": "london-Circle", "id": "london-circle-1870-blackfriars", "kind": "extension", "label": { "en": "Metropolitan District Railway extension: Westminster → Blackfriars" }, "opened": "1870-05-30", "segment": { "fromStopIndex": 22, "toStopIndex": 25 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "The line was opened from Westminster to Blackfriars on 30 May 1870", "tier": "tertiary", "title": "Metropolitan District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/circle.html", "kind": "other", "quote": "Westminster to Blackfriars opened ... 1870-05-30", "tier": "secondary", "title": "CULG — Circle Line", "url": "https://www.davros.org/rail/culg/circle.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "The line was opened from Westminster to Blackfriars on 30 May 1870 with stations at Charing Cross (now Embankment), The Temple (now Temple) and Blackfriars.", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Circle_line_(London_Underground)" } ] }, { "confidence": "medium", "geometryRef": "london-Circle", "id": "london-circle-1871-mansion-house", "kind": "extension", "label": { "en": "Metropolitan District Railway extension: Blackfriars → Mansion House (southern arc reaches the City)" }, "notes": "[Opening-date chase 2026-06-13] Ceremonial vs revenue: opening banquet (attended by PM Gladstone, a shareholder) was Saturday 1 July 1871; Mansion House opened to public the following Monday, 3 July 1871. Curated revenue date is correct.", "opened": "1871-07-03", "segment": { "fromStopIndex": 21, "toStopIndex": 22 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Mansion House opened on Monday, 3 July 1871, following an opening banquet on Saturday, 1 July 1871", "tier": "tertiary", "title": "Metropolitan District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/circle.html", "kind": "other", "quote": "Blackfriars to Mansion House opened ... 1871-07-03", "tier": "secondary", "title": "CULG — Circle Line", "url": "https://www.davros.org/rail/culg/circle.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "On Saturday 1 July 1871, an opening banquet was attended by prime minister William Gladstone, who was also a shareholder. The following Monday, Mansion House opened and the District began running its own trains.", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Circle_line_(London_Underground)" } ] }, { "confidence": "medium", "geometryRef": "london-Circle", "id": "london-circle-1882-tower-hill", "kind": "extension", "label": { "en": "Metropolitan Railway eastern extension: Aldgate → Tower Hill (temporary station; District also extending to meet it)" }, "notes": "[Opening-date chase 2026-06-13] Tower Hill was a temporary station at this stage, replaced by the joint station in 1884.", "opened": "1882-09-25", "segment": { "fromStopIndex": 17, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/circle.html", "kind": "other", "quote": "Tower Hill (1) to Aldgate opened ... 1882-09-25", "tier": "secondary", "title": "CULG — Circle Line", "url": "https://www.davros.org/rail/culg/circle.html" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123126/https://en.wikipedia.org/wiki/Inner_Circle_(London_Underground)", "kind": "wikipedia", "quote": "In 1882, the Metropolitan extended its line from Aldgate to a temporary station at Tower Hill and the District completed its line to Whitechapel.", "tier": "tertiary", "title": "Inner Circle (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Inner_Circle_(London_Underground)" } ] }, { "confidence": "medium", "geometryRef": "london-Circle", "id": "london-circle-1884-loop-complete", "kind": "extension", "label": { "en": "Inner Circle completed: Mansion House → Tower Hill joint station opens, closing the loop and starting the continuous circular service" }, "notes": "[Opening-date chase 2026-06-13] Ceremonial vs revenue: official opening ceremony 17 September 1884 plus trial running preceded the public circular service start on Monday 6 October 1884. Curated revenue date is correct.", "opened": "1884-10-06", "segment": { "fromStopIndex": 18, "toStopIndex": 21 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123126/https://en.wikipedia.org/wiki/Inner_Circle_(London_Underground)", "kind": "wikipedia", "quote": "On 6 October 1884, the temporary station was replaced with a joint station and the inner circle was complete.", "tier": "tertiary", "title": "Inner Circle (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Inner_Circle_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/circle.html", "kind": "other", "quote": "Mansion House to Tower Hill (1) opened ... 1884-10-06 ... circular service started", "tier": "secondary", "title": "CULG — Circle Line", "url": "https://www.davros.org/rail/culg/circle.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "After an official opening ceremony on 17 September and trial running, a circular service started on Monday 6 October 1884.", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Circle_line_(London_Underground)" } ] }, { "confidence": "medium", "geometryRef": "london-Circle", "id": "london-circle-1949-own-identity", "kind": "renumber", "label": { "en": "Circle line given its own identity: shown separately (in yellow) on the Tube map for the first time" }, "notes": "Map/identity designation rather than new track; covers the whole then-existing loop. [Opening-date chase 2026-06-13] Sources differ by one year: Wikipedia body text says the Circle line was shown separately on the map in 1949, while the infobox footnote (Ovenden 2013, p.220) dates the first separate map appearance to 1948. This phase marks a cartographic identity change, not a line opening.", "opened": "1949", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611122857/https://en.wikipedia.org/wiki/Circle_line_(London_Underground)", "kind": "wikipedia", "quote": "in 1949 the Circle line was shown separately on the map", "tier": "tertiary", "title": "Circle line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Circle_line_(London_Underground)" } ] }, { "confidence": "high", "geometryRef": "london-Circle", "id": "london-circle-2009-spiral", "kind": "extension", "label": { "en": "Circle line reconfigured from closed loop to spiral: extended from Edgware Road west to Hammersmith over the Hammersmith & City route" }, "notes": "The spiral added the Edgware Road→Hammersmith arc (Goldhawk Road=0 … Edgware Road=8 on the spine). [Opening-date chase 2026-06-13] Londonist source (already cited) returned HTTP 403 on both live and archived URLs; its title 'Circle Line Extension Set For December 13th' still corroborates the date. Not added as a newly accepted source due to access issue.", "opened": "2009-12-13", "segment": { "fromStopIndex": 0, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611122857/https://en.wikipedia.org/wiki/Circle_line_(London_Underground)", "kind": "wikipedia", "quote": "Prior to 13 December 2009, Circle line trains travelled in both directions around a simple loop ... the closed loop ... was broken at Edgware Road and extended west to become a spiral to Hammersmith.", "tier": "tertiary", "title": "Circle line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Circle_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20250819175657/https://londonist.com/2009/11/circle_line_uncircling_set_for_dece", "kind": "news", "quote": "Circle Line Extension Set For December 13th", "tier": "secondary", "title": "Circle Line Extension Set For December 13th — Londonist", "url": "https://londonist.com/2009/11/circle_line_uncircling_set_for_dece" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611122857/https://en.wikipedia.org/wiki/Circle_line_(London_Underground)", "kind": "wikipedia", "tier": "tertiary", "title": "Circle line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Circle_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/circle.html", "kind": "other", "tier": "secondary", "title": "CULG — Circle Line", "url": "https://www.davros.org/rail/culg/circle.html" } ] }, { "cityId": "london", "color": "#00782A", "displayNumber": "District", "id": "london-line-district", "name": { "en": "District line (Ealing Broadway ↔ Upminster)" }, "phases": [ { "confidence": "medium", "constructionStart": "1865", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": false, "value": 3000000, "year": 1868 }, "notes": "Cost of the initial South Kensington–Westminster section. '£3 million, almost three times the cost of the Met's original, longer line'. Authorised by the Metropolitan District Railways Act 1864. [Citation chase 2026-06-11] The £3m reflects actual cost driven up by high construction and land-compensation costs (per Wolmar 2004, p.72 and Horne 2006, pp.7–8, as cited on Wikipedia), i.e. an outturn rather than the 1864 authorized figure; both underlying print sources are offline and could not be directly verified.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "South Kensington–Westminster (24 December 1868) ... Cost: £3 million, almost three times the cost of the Met's original, longer line", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ] }, "geometryRef": "london-District", "id": "london-district-1868-initial", "kind": "initial", "label": { "en": "Initial opening: South Kensington → Westminster (Metropolitan District Railway)" }, "notes": "[Date chase 2026-06-12] District Railway (redirect target) confirms enabling Act royal assent 29 July 1864 and a single-contract works letting; Museum of London print dated 1866-67 shows construction near South Kensington underway, consistent with the curated 1865 start.", "opened": "1868-12-24", "segment": { "fromStopIndex": 12, "toStopIndex": 16 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "South Kensington–Westminster (24 December 1868) ... Cost: £3 million, almost three times the cost of the Met's original, longer line", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251011232829/https://www.tube-history.uk/district-line.php", "kind": "other", "quote": "The initial section of the railway cost £3 million to construct, three times the cost of constructing the Metropolitan Railway.", "tier": "secondary", "title": "District line — Tube History", "url": "https://tube-history.uk/district-line.php" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "the construction works for all of the extensions were let as a single contract [following the Metropolitan District Railways Act 1864, royal assent 29 July 1864] ... On 24 December 1868, the District opened its line from South Kensington to Westminster", "tier": "secondary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "Print dated 1866–67 of 'The construction of the Metropolitan District Railway' near South Kensington. Available from Museum of London", "tier": "secondary", "title": "District Railway — Wikipedia (Museum of London print reference)", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260317025902/https://en.wikipedia.org/wiki/Westminster_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The station was opened as Westminster Bridge on 24 December 1868 by the steam-operated District Railway (DR)", "tier": "tertiary", "title": "Westminster tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Westminster_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 5 }, { "confidence": "medium", "geometryRef": "london-District#2", "id": "london-district-1869-west-brompton", "kind": "extension", "label": { "en": "Extension: Gloucester Road → West Brompton" }, "notes": "West Brompton (index 6) on the Wimbledon-branch sub-spine; the shuttle ran from Gloucester Road, which sits on the main spine.", "opened": "1869-04-12", "segment": { "fromStopIndex": 0, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "West Brompton (12 April 1869) - Single track shuttle from Brompton (Gloucester Road)", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161803/https://en.wikipedia.org/wiki/West_Brompton_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "On 12 April 1869, the District Railway (DR, now the District line) opened its own station adjacent to the WLEJR station as the terminus and only station on its extension from Gloucester Road station", "tier": "tertiary", "title": "West Brompton tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/West_Brompton_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "london-District", "id": "london-district-1870-blackfriars", "kind": "extension", "label": { "en": "Extension: Westminster → Blackfriars (Victoria Embankment)" }, "opened": "1870-05-30", "segment": { "fromStopIndex": 16, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Westminster–Blackfriars (30 May 1870) - Stations: Charing Cross (now Embankment), The Temple (now Temple), Blackfriars - Built along Victoria Embankment by the Metropolitan Board of Works", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260606165820/https://en.wikipedia.org/wiki/Embankment_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The station was opened on 30 May 1870 by the DR (now the District line) when the railway extended its line from Westminster to Blackfriars.", "tier": "tertiary", "title": "Embankment tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Embankment_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260526163537/https://en.wikipedia.org/wiki/Temple_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Temple station was opened in the parish of St. Clement Danes on 30 May 1870 by the District Railway", "tier": "tertiary", "title": "Temple tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Temple_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": "london-District", "id": "london-district-1871-mansion-house", "kind": "extension", "label": { "en": "Extension: Blackfriars → Mansion House (terminus); District begins running own trains" }, "notes": "[Opening-date chase 2026-06-13] Ceremonial opening banquet (attended by PM Gladstone) was held Saturday 1 July 1871; public service and District's own trains started Monday 3 July 1871. Curated date = revenue-service start.", "opened": "1871-07-03", "segment": { "fromStopIndex": 19, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Blackfriars–Mansion House (3 July 1871) ... Opened with opening banquet attended by prime minister William Gladstone", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251215103354/https://en.wikipedia.org/wiki/Mansion_House_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "opened on 3 July 1871 by the Metropolitan District Railway (MDR, now the District line) when the company extended its line eastwards from St. Paul's station", "tier": "tertiary", "title": "Mansion House tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Mansion_House_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "london-District", "id": "london-district-1871-earls-court", "kind": "extension", "label": { "en": "Infill station: Earl's Court opens (West Brompton – Gloucester Road)" }, "notes": "[Opening-date chase 2026-06-13] Dedicated Earl's Court station article gives 30 October 1871 (Monday) in both body and infobox; the Metropolitan District Railway summary gives 31 October. Consider correcting curated date to 1871-10-30 to match the dedicated station source.", "opened": "1871-10-31", "segment": { "fromStopIndex": 10, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Earl's Court (31 October 1871) - Station between Gloucester Road and West Brompton", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260522022524/https://en.wikipedia.org/wiki/Earl%27s_Court_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Local residents near Earl's Court lodged a petition against the DR building the station, which opened on 30 October. [infobox: 30 October 1871 - Opened (District)]", "tier": "tertiary", "title": "Earl's Court tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Earl%27s_Court_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 1 }, { "confidence": "medium", "constructionStart": "1873", "geometryRef": "london-District", "id": "london-district-1874-hammersmith", "kind": "extension", "label": { "en": "Extension: Earl's Court → Hammersmith" }, "notes": "[Date chase 2026-06-12] Authorization year (1873) matches curated construction start; no source gives an explicit ground-breaking date.", "opened": "1874-09-09", "segment": { "fromStopIndex": 7, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Hammersmith (9 September 1874) - Authorization: Hammersmith Extension Railway Act 1873 (7 July 1873) - Stations: North End (Fulham, renamed West Kensington 1877), Hammersmith", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "Permission to build a railway 1+1/2 miles long to Hammersmith was granted in the Hammersmith Extension Railway Act 1873 on 7 July 1873, the independent Hammersmith Extension Railway having been formed to raise the necessary capital ... It opened on 9 September 1874", "tier": "secondary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "london-District#3", "id": "london-district-1877-richmond", "kind": "extension", "label": { "en": "Extension: Hammersmith → Richmond (over LSWR tracks)" }, "notes": "Mapped to the Richmond-branch sub-spine: Hammersmith (index 35) through Gunnersbury (39), Kew Gardens (40) and Richmond (41). [Opening-date chase 2026-06-13] A separate 1 October 1877 date refers to the Metropolitan Railway restarting a former GWR service to Richmond — a different operator, not the District Railway opening.", "opened": "1877-06-01", "segment": { "fromStopIndex": 35, "toStopIndex": 41 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Richmond (1 June 1877) - Extended from Hammersmith via a 1⁄2-mile (0.80 km) link", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260525152750/https://en.wikipedia.org/wiki/Richmond_station_(London)", "kind": "other", "publisher": "Wikipedia", "quote": "On 1 June 1877, the District Railway (DR) linked its then terminus at Hammersmith to the nearby L&SWR tracks east of the present Ravenscourt Park station. The DR began running trains over the L&SWR tracks to Richmond.", "tier": "tertiary", "title": "Richmond station (London) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Richmond_station_(London)", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ] }, { "confidence": "low", "geometryRef": "london-District", "id": "london-district-1879-ealing-broadway", "kind": "extension", "label": { "en": "Branch opens: Turnham Green → Ealing Broadway" }, "opened": "1879-07-01", "segment": { "fromStopIndex": 0, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515170724/https://en.wikipedia.org/wiki/Ealing_Broadway_station", "kind": "wikipedia", "quote": "District Railway services commenced on 1 July 1879, when the DR opened a branch from Turnham Green ... This branch extended to Ealing Broadway", "tier": "tertiary", "title": "Ealing Broadway station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Ealing_Broadway_station" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260522022550/https://en.wikipedia.org/wiki/Acton_Town_tube_station", "kind": "wikipedia", "quote": "Acton Town station was opened as Mill Hill Park on 1 July 1879 by the District Railway ... on the District Railway's extension from Turnham Green to Ealing Broadway", "tier": "tertiary", "title": "Acton Town tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Acton_Town_tube_station" } ], "stationCount": 4 }, { "confidence": "medium", "constructionStart": "1878", "geometryRef": "london-District#2", "id": "london-district-1880-putney-bridge", "kind": "extension", "label": { "en": "Branch opens: Earl's Court → Putney Bridge & Fulham" }, "notes": "Mapped to the Wimbledon-branch sub-spine: Fulham Broadway (index 7), Parsons Green (8), Putney Bridge (9); the branch leaves the main spine at Earl's Court. [Date chase 2026-06-12] Authorization year (1878) matches curated construction start; no source gives an explicit ground-breaking date.", "opened": "1880-03-01", "segment": { "fromStopIndex": 6, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Putney Bridge/Fulham (1 March 1880) - Authorization: 4 July 1878 - Stations: Walham Green (Fulham Broadway), Parsons Green, Putney Bridge & Fulham", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "On 4 July 1878, permission was granted to extend the West Brompton branch as far as the Thames ... The line opened on 1 March 1880", "tier": "secondary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": null, "id": "london-district-1883-hounslow", "kind": "extension", "label": { "en": "Branch opens: Mill Hill Park (Acton Town) → Hounslow Town" }, "notes": "On the Hounslow branch (now Piccadilly), not on the drawn spine.", "opened": "1883-05-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Hounslow (1 May 1883–1884) ... Hounslow Town opened with stations at South Ealing, Boston Road, Osterley & Spring Grove", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260321232941/https://en.wikipedia.org/wiki/Hounslow_Town_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Hounslow Town station was opened by the District Railway (DR) on 1 May 1883 as the terminus of a new extension of the DR from Acton Town.", "tier": "tertiary", "title": "Hounslow Town tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hounslow_Town_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 4 }, { "confidence": "medium", "geometryRef": "london-District", "id": "london-district-1884-whitechapel", "kind": "extension", "label": { "en": "Extension: Mansion House → Whitechapel; Inner Circle completed (with Metropolitan Railway)" }, "notes": "[Opening-date chase 2026-06-13] Official opening ceremony and trial running on 17 September 1884; circular revenue service began Monday 6 October 1884. Curated date = revenue-service start.", "opened": "1884-10-06", "segment": { "fromStopIndex": 20, "toStopIndex": 25 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Mansion House–Whitechapel (6 October 1884) - Circular service began Monday 6 October 1884 - New joint stations: Aldgate East, St Mary's", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260208055548/https://en.wikipedia.org/wiki/Aldgate_East_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The original Aldgate East station opened on 6 October 1884.", "tier": "tertiary", "title": "Aldgate East tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Aldgate_East_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": null, "id": "london-district-1884-hounslow-barracks", "kind": "extension", "label": { "en": "Branch shuttle opens: Hounslow Town → Hounslow Barracks (now Hounslow West)" }, "notes": "On the Hounslow branch (now Piccadilly), not on the drawn spine. [Opening-date chase 2026-06-13] Curated record can be refined from year-only 1884 to 1884-07-21 per the Hounslow West (formerly Hounslow Barracks) station article.", "opened": "1884", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Hounslow Barracks (now West): single-track line opened 1884", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260208145128/https://en.wikipedia.org/wiki/Hounslow_West_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The station was opened as Hounslow Barracks on a single-track branch of the Hounslow & Metropolitan Railway on 21 July 1884 [infobox: 21 July 1884 - Opened as Hounslow Barracks; terminus of line]", "tier": "tertiary", "title": "Hounslow West tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hounslow_West_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 1 }, { "confidence": "low", "constructionStart": "1887", "geometryRef": "london-District#2", "id": "london-district-1889-wimbledon", "kind": "extension", "label": { "en": "Running rights begin: Putney Bridge → Wimbledon (over LSWR-built line)" }, "notes": "Mapped to the Wimbledon-branch sub-spine: East Putney (index 10), Southfields (11), Wimbledon Park (12), Wimbledon (13). [Date chase 2026-06-12] Putney to Wimbledon line (Wikipedia, citing R A Williams, The London and South Western Railway vol. 2) explicitly dates works/bridge start to April 1887 — direct confirmation of the curated date. [Opening-date chase 2026-06-13] The 27 August 1905 date in related sources refers to the start of District electric working through to Wimbledon, not the initial 1889 steam-worked opening.", "opened": "1889-06-03", "segment": { "fromStopIndex": 9, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20250626132556/https://en.wikipedia.org/wiki/Putney_to_Wimbledon_line", "kind": "wikipedia", "quote": "The District Railway opened the London and South Western Railway-built extension of its line from Putney Bridge on 3 June 1889 ... The Fulham railway bridge (Putney Bridge) was begun in April 1887 and completed by April 1889.", "tier": "tertiary", "title": "Putney to Wimbledon line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Putney_to_Wimbledon_line" } ], "stationCount": 4 }, { "confidence": "medium", "constructionStart": "1897", "geometryRef": "london-District", "id": "london-district-1902-east-ham", "kind": "extension", "label": { "en": "Extension: Whitechapel → East Ham (via Whitechapel & Bow Railway)" }, "notes": "Research lists 3 new stations (Stepney Green, Mile End, Bow Road); the served section runs Whitechapel→East Ham on the spine. [Date chase 2026-06-12] 1897 reflects parliamentary permission (Aug 1897), not ground-breaking; further acts followed in 1898 and 1900, and physical-construction signs (rehousing 1901, station closure for reconstruction Feb 1902) suggest actual works began nearer 1899-1901.", "opened": "1902-06-02", "segment": { "fromStopIndex": 25, "toStopIndex": 33 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Whitechapel–East Ham (2 June 1902) - Authorization: Whitechapel and Bow Railway 1897 - Stations: Stepney Green, Mile End, Bow Road ... Some District services were extended from Whitechapel to East Ham", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "In 1897 the nominally independent Whitechapel and Bow Railway received permission for a link from the District Railway at Whitechapel to the London, Tilbury and Southend Railway (LT&SR) at an above-ground junction at Bow ... The LT&SR and District jointly took over the company the following year and the line opened on 2 June 1902", "tier": "secondary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260306052659/https://en.wikipedia.org/wiki/East_Ham_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The Whitechapel and Bow Railway opened on 2 June 1902 and allowed through services of the District Railway to operate to Upminster. Service began at East Ham on 2 June 1902.", "tier": "tertiary", "title": "East Ham tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/East_Ham_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": null, "id": "london-district-1903-south-harrow", "kind": "extension", "label": { "en": "Electric branch opens: Park Royal & Twyford Abbey → South Harrow" }, "notes": "On the Ealing/South Harrow branch later taken over by the Piccadilly line, not on the drawn District spine. [Opening-date chase 2026-06-13] Park Royal opened partially on 23 June 1903 as a shuttle for the Royal Agricultural Show; the full extension to South Harrow opened 28 June 1903 (the curated date).", "opened": "1903-06-28", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Ealing–South Harrow (June-28 June 1903) - Shuttle to Park Royal opened 23 June for Royal Agricultural Show - Main line: 28 June with stations at North Ealing, Park Royal & Twyford Abbey, Perivale-Alperton, Sudbury Town, Sudbury Hill, South Harrow", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260502033304/https://en.wikipedia.org/wiki/Sudbury_Town_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Sudbury Town station was opened on 28 June 1903 by the District Railway (DR, now the District line) on its new extension to South Harrow from Park Royal & Twyford Abbey.", "tier": "tertiary", "title": "Sudbury Town tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Sudbury_Town_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260201184605/https://en.wikipedia.org/wiki/South_Harrow_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "South Harrow station was opened on 28 June 1903 by the District Railway (DR, now the District line) as the terminus of its new extension from Park Royal & Twyford Abbey.", "tier": "tertiary", "title": "South Harrow tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/South_Harrow_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251122013236/https://en.wikipedia.org/wiki/Park_Royal_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The District Railway (DR, now the District line) opened the line through Park Royal on its new extension to South Harrow on 23 June 1903.", "tier": "tertiary", "title": "Park Royal tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Park_Royal_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 7 }, { "confidence": "low", "geometryRef": null, "id": "london-district-1905-hounslow-south-acton-electric", "kind": "extension", "label": { "en": "Electric services commence: Hounslow & South Acton branches (first electric conversion)" }, "notes": "Electrification of the off-spine Hounslow and South Acton branches.", "opened": "1905-06-13", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Electric Services Commence (13 June 1905) - Hounslow and South Acton first electric service", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ] }, { "confidence": "low", "geometryRef": "london-District", "id": "london-district-1905-core-electrified", "kind": "extension", "label": { "en": "Electrification of core: Ealing → Whitechapel and Inner Circle electrified" }, "notes": "Electrification of the core Ealing Broadway→Whitechapel route (no new stations).", "opened": "1905-07-01", "segment": { "fromStopIndex": 0, "toStopIndex": 25 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "1 July 1905: Ealing to Whitechapel plus inner circle electrification", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ] }, { "confidence": "medium", "geometryRef": "london-District", "id": "london-district-1908-barking", "kind": "extension", "label": { "en": "Extension: East Ham → Barking (electrified)" }, "opened": "1908-04-01", "segment": { "fromStopIndex": 33, "toStopIndex": 34 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "East Ham–Barking (1 April 1908) - Four tracks were laid and two electrified as far as Barking - Work largely finished by July 1908", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260510211054/https://en.wikipedia.org/wiki/Barking_station", "kind": "other", "publisher": "Wikipedia", "quote": "On 1 April 1908, electric service was extended to Barking.", "tier": "tertiary", "title": "Barking station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Barking_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "london-District", "id": "london-district-1932-upminster", "kind": "extension", "label": { "en": "Extension: Barking → Upminster (District tracks alongside LMS line)" }, "notes": "Research lists 2 new District-platform stations (Upney, Dagenham Heathway); the served section runs Barking→Upminster along the spine. [Opening-date chase 2026-06-13] The 'restarted' wording reflects that District service had been cut back to East Ham in 1905; 1932 was the restoration of through service on electrified tracks to Upminster.", "opened": "1932-09-12", "segment": { "fromStopIndex": 34, "toStopIndex": 42 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Barking–Upminster (12 September 1932) - New stations: Upney, Heathway (Dagenham Heathway) - Platforms only on the District tracks", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123114/https://en.wikipedia.org/wiki/District_line", "kind": "wikipedia", "quote": "Services were extended again to Barking in 1908 ... Extended to Upminster; same year Piccadilly line took over Uxbridge branch.", "tier": "tertiary", "title": "District line — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251203073902/https://en.wikipedia.org/wiki/Upminster_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "12 September 1932 – District line restarted", "tier": "tertiary", "title": "Upminster tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Upminster_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 2 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123114/https://en.wikipedia.org/wiki/District_line", "kind": "wikipedia", "tier": "tertiary", "title": "District line — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "tier": "tertiary", "title": "Metropolitan District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ] }, { "cityId": "london", "color": "#F3A9BB", "displayNumber": "Hammersmith & City", "id": "london-line-hammersmith-city", "name": { "en": "Hammersmith & City line (Hammersmith ↔ Barking)" }, "phases": [ { "confidence": "medium", "constructionStart": "1861", "geometryRef": "london-Hammersmith & City", "id": "london-hammersmith-city-1864-initial", "kind": "initial", "label": { "en": "Hammersmith & City Railway opens: Farringdon → Hammersmith (GWR-operated branch off the Metropolitan Railway)" }, "notes": "Authorised by the Hammersmith and City Railway Act 1861; a section of viaduct near Ladbroke Grove collapsed on 6 November 1861, killing six workers. Sources vary on the exact original station list (7 cited for the through GWR Farringdon–Hammersmith service). No reliable construction cost was sourced. [Date chase 2026-06-12] London Reconnections explicitly dates construction start to August 1861; underlying book sources (Jackson 1986 pp.38-40; Wolmar 2004 pp.66-67) are offline and unverified. [Opening-date chase 2026-06-13] Original opening was delayed roughly a year by the 6 November 1861 viaduct collapse near Latimer Road/Ladbroke Grove that killed six workers.", "opened": "1864-06-13", "segment": { "fromStopIndex": 0, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427004733/https://en.wikipedia.org/wiki/Hammersmith_%26_City_line", "kind": "wikipedia", "quote": "the line opened on 13 June 1864 with a GWR service from Farringdon to Hammersmith", "tier": "tertiary", "title": "Hammersmith & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123131/https://en.wikipedia.org/wiki/Hammersmith_%26_City_Railway#History", "kind": "wikipedia", "quote": "The \"Hammersmith and City Railway Act 1861\" received royal assent on \"22 July 1861\" and was cited as \"24 & 25 Vict. c. clxiv.\"", "tier": "tertiary", "title": "Hammersmith & City Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20240613090734/https://www.londonreconnections.com/2024/the-unknown-hammersmith-city-construction-calamity/", "kind": "other", "quote": "a major construction incident occurred on 6 November 1861 when a section of the viaduct near Ladbroke Grove collapsed due to unstable, waterlogged ground conditions worsened by heavy rain, resulting in the deaths of six workers", "tier": "secondary", "title": "The Unknown Hammersmith & City Construction Calamity — London Reconnections", "url": "https://www.londonreconnections.com/2024/the-unknown-hammersmith-city-construction-calamity/" } ], "stationCount": 7 }, { "confidence": "low", "geometryRef": null, "id": "london-hammersmith-city-1864-addison-road", "kind": "extension", "label": { "en": "Branch service added: Latimer Road → Addison Road (now Kensington (Olympia)) via West London Railway link" }, "notes": "Ran via the West London Railway link near Latimer Road to Addison Road (Kensington Olympia) — off the drawn Hammersmith→Barking spine. Exact day not sourced; year 1864 confirmed.", "opened": "1864", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427004733/https://en.wikipedia.org/wiki/Hammersmith_%26_City_line", "kind": "wikipedia", "quote": "services to Addison Road (now Kensington (Olympia) station) on the West London Railway via a link at Latimer Road starting a few weeks later", "tier": "tertiary", "title": "Hammersmith & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" } ] }, { "confidence": "medium", "geometryRef": "london-Hammersmith & City", "id": "london-hammersmith-city-1876-aldgate", "kind": "extension", "label": { "en": "Eastern extension: terminus opens at Aldgate (Metropolitan Railway, served by Hammersmith trains)" }, "notes": "The Metropolitan was extended east of Farringdon to a new Aldgate terminus, extending Hammersmith services eastward. Aldgate proper is not on the spine; mapped to the on-spine eastward reach Farringdon→Aldgate East.", "opened": "1876-11-18", "segment": { "fromStopIndex": 14, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427004733/https://en.wikipedia.org/wiki/Hammersmith_%26_City_line", "kind": "wikipedia", "quote": "The railway was extended east of Farringdon and a terminus opened at Aldgate on 18 November 1876", "tier": "tertiary", "title": "Hammersmith & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251113022021/https://en.wikipedia.org/wiki/Aldgate_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Aldgate station was opened on 18 November 1876, with a southbound extension to Tower Hill opening on 25 September 1882", "tier": "tertiary", "title": "Aldgate tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Aldgate_tube_station", "via": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/circle.html", "kind": "other", "publisher": "davros.org (Clive's Underground Line Guides)", "quote": "Aldgate to Liverpool Street opened [M] — 1876-11-18", "tier": "secondary", "title": "Clive's Underground Line Guides — Circle line", "url": "http://www.davros.org/rail/culg/circle.html", "via": "https://en.wikipedia.org/wiki/Aldgate_tube_station" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": null, "id": "london-hammersmith-city-1884-new-cross", "kind": "extension", "label": { "en": "Service extended over East London Railway: Hammersmith → New Cross" }, "notes": "Ran over the East London Railway to New Cross — off the drawn spine. Exact day within October 1884 not sourced. [Opening-date chase 2026-06-13] Through Hammersmith & City services to New Cross (SER) began 6 October 1884; the 1 October 1884 date applies to Metropolitan/District services from St Mary's only.", "opened": "1884-10", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427004733/https://en.wikipedia.org/wiki/Hammersmith_%26_City_line", "kind": "wikipedia", "quote": "In October 1884, the Met extended some Hammersmith services over the ELR to New Cross", "tier": "tertiary", "title": "Hammersmith & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260430084309/https://en.wikipedia.org/wiki/East_London_line", "kind": "other", "publisher": "Wikipedia", "quote": "Metropolitan Railway services from St Mary's to New Cross (SER) and Metropolitan District Railway services from St Mary's to New Cross Gate (LB&SCR) commenced on 1 October 1884. On 6 October through services started from Hammersmith (Hammersmith & City) to New Cross (SER) and from Hammersmith (MDR) to New Cross (LB&SCR).", "tier": "tertiary", "title": "East London line — Wikipedia", "url": "https://en.wikipedia.org/wiki/East_London_line", "via": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" } ] }, { "confidence": "medium", "geometryRef": "london-Hammersmith & City", "id": "london-hammersmith-city-1936-barking", "kind": "extension", "label": { "en": "Service diverted to Barking via Whitechapel & Bow Railway" }, "notes": "Hammersmith & City trains diverted from the East London line to Barking via the Whitechapel & Bow route (Aldgate East→Barking on the spine). Exact date not sourced.", "opened": "1936", "segment": { "fromStopIndex": 18, "toStopIndex": 28 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427004733/https://en.wikipedia.org/wiki/Hammersmith_%26_City_line", "kind": "wikipedia", "quote": "from 1936 some Hammersmith & City line trains were diverted from the East London line to Barking", "tier": "tertiary", "title": "Hammersmith & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251126050551/https://en.wikipedia.org/wiki/Whitechapel_%26_Bow_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "The Metropolitan line provided a peak time service from 1936", "tier": "tertiary", "title": "Whitechapel & Bow Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Whitechapel_%26_Bow_Railway", "via": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260425162651/https://en.wikipedia.org/wiki/Metropolitan_line", "kind": "other", "publisher": "Wikipedia", "quote": "In 1936, the line was extended east from Whitechapel to Barking along the tracks of the District line.", "tier": "tertiary", "title": "Metropolitan line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_line", "via": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" } ] }, { "confidence": "medium", "geometryRef": "london-Hammersmith & City", "id": "london-hammersmith-city-1990-rebrand", "kind": "renumber", "label": { "en": "Rebranded as a separate line: Hammersmith & City line gains its own (pink) identity, split from the Metropolitan line" }, "notes": "Identity/rebranding event (no physical construction): the route, previously shown as part of the Metropolitan line, gained its own pink identity. Covers the whole then-existing route. [Opening-date chase 2026-06-13] The operational redesignation occurred 30 July 1990 (Tube map / separate-identity change, per Railway Magazine Oct 1990); 31 July 1990 appears to be the public launch ceremony marked by the pink-balloon release.", "opened": "1990-07-31", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427004733/https://en.wikipedia.org/wiki/Hammersmith_%26_City_line", "kind": "wikipedia", "quote": "The new identity, launched on 31 July 1990, was marked by the release of several hundred pink balloons", "tier": "tertiary", "title": "Hammersmith & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260112154440/https://en.wikipedia.org/wiki/Whitechapel_station", "kind": "other", "publisher": "Wikipedia", "quote": "On 30 July 1990, the Hammersmith–Barking service of the Metropolitan line gained a separate identity as the Hammersmith & City line.", "tier": "tertiary", "title": "Whitechapel station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Whitechapel_station", "via": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" } ] }, { "confidence": "medium", "geometryRef": "london-Hammersmith & City", "id": "london-hammersmith-city-2009-barking", "kind": "extension", "label": { "en": "All services extended east to Plaistow / Barking following Whitechapel reconstruction" }, "notes": "Since December 2009 all services run to Plaistow or Barking (Whitechapel→Barking on the spine). Exact day within December 2009 not sourced. [Opening-date chase 2026-06-13] Off-peak extension to Barking began 13 December 2009 (TfL sub-surface railway service-pattern change).", "opened": "2009-12", "segment": { "fromStopIndex": 19, "toStopIndex": 28 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427004733/https://en.wikipedia.org/wiki/Hammersmith_%26_City_line", "kind": "wikipedia", "quote": "since December 2009 all services have been extended to Plaistow or Barking", "tier": "tertiary", "title": "Hammersmith & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260112154440/https://en.wikipedia.org/wiki/Whitechapel_station", "kind": "other", "publisher": "Wikipedia", "quote": "From 13 December 2009, off-peak Hammersmith & City line service was extended from Whitechapel to Barking with a daily all-day service at Whitechapel.", "tier": "tertiary", "title": "Whitechapel station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Whitechapel_station", "via": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427004733/https://en.wikipedia.org/wiki/Hammersmith_%26_City_line", "kind": "wikipedia", "tier": "tertiary", "title": "Hammersmith & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" } ] }, { "cityId": "london", "color": "#868F98", "displayNumber": "Jubilee", "id": "london-line-jubilee", "name": { "en": "Jubilee line (West Ham ↔ Canons Park)" }, "phases": [ { "confidence": "medium", "constructionStart": "1971", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": true, "value": 90000000, "year": 1979 }, "notes": "Approximate construction cost of the original Stage 1 (Fleet/Jubilee line) tunnel section Baker Street–Charing Cross; widely cited ~£90 million. Treat as estimate — exact outturn not confirmed in primary sources. The line absorbed the existing Stanmore–Baker Street Bakerloo branch (no new stations there); the 3 new stations were Bond Street, Green Park and Charing Cross. [Citation chase 2026-06-11] Per London Reconnections (Jonathan Roberts, 2016), £90m was the outturn cost on completion, up from a 1971 estimate of £35m — i.e. an actual final cost (~£15m per single-track mile at outturn prices), not an estimate. This figure rests on a single secondary source citing no primary record; the previously cited Wikipedia article carries no cost figure.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516153506/https://en.wikipedia.org/wiki/Jubilee_line", "kind": "wikipedia", "quote": "The Baker Street to Stanmore branch of the Bakerloo line was joined at Baker Street to a new 2.5-mile (4 km) segment into central London, with intermediate stops at Bond Street and Green Park and terminating at a new station at Charing Cross. The work was completed in 1979.", "tier": "tertiary", "title": "Jubilee line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_line" } ] }, "geometryRef": "london-Jubilee", "id": "london-jubilee-1979-stage1", "kind": "initial", "label": { "en": "Stage 1 opens: Baker Street → Charing Cross (new tunnel) plus transfer of the Stanmore → Baker Street Bakerloo branch" }, "notes": "Covers the 1979 line as drawn on the Jubilee spine: Green Park (index 10) through Baker Street, St John's Wood and the absorbed Stanmore branch up to Canons Park/Stanmore (index 24). The original Charing Cross stub (Green Park→Charing Cross) is closed and off-spine. Cost was contested in research and settled by tiebreaker. [Date chase 2026-06-12] No primary source dates the Fleet line groundbreaking more precisely than 'in 1971'; year-granularity 1971 is the best-evidenced value. [Opening-date chase 2026-06-13] Ceremonial opening by Prince Charles was 30 April 1979; revenue/public passenger service began 1 May 1979 (the curated date).", "opened": "1979-05-01", "segment": { "fromStopIndex": 10, "toStopIndex": 24 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516153506/https://en.wikipedia.org/wiki/Jubilee_line", "kind": "wikipedia", "quote": "The Baker Street to Stanmore branch of the Bakerloo line was joined at Baker Street to a new 2.5-mile (4 km) segment into central London, with intermediate stops at Bond Street and Green Park and terminating at a new station at Charing Cross. The work was completed in 1979.", "tier": "tertiary", "title": "Jubilee line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251207000926/https://tubehistory.uk/jubilee-line.php", "kind": "other", "quote": "The Jubilee line was officially opened by Prince Charles, the Prince of Wales, on 30 April 1979; with passenger services starting in 1 May 1979.", "tier": "tertiary", "title": "Jubilee line — Tube History", "url": "https://tubehistory.uk/jubilee-line.php" }, { "accessedAt": "2026-06-13", "kind": "other", "publisher": "tubehistory.uk", "quote": "The Jubilee line was officially opened by Prince Charles, the Price of Wales, on 30 April 1979; with passenger services starting in 1 May 1979.", "tier": "tertiary", "title": "Jubilee line — Tube History", "url": "https://web.archive.org/web/20251207000926/https://tubehistory.uk/jubilee-line.php", "via": "https://en.wikipedia.org/wiki/Jubilee_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/jubilee.html", "kind": "other", "publisher": "davros.org (Clive Feather)", "quote": "1979-04-30 Stanmore to Baker Street withdrawn [Bakerloo] 1979-05-01 Stanmore to Baker Street started; Baker Street to Green Park opened; Green Park to Charing Cross opened", "tier": "tertiary", "title": "Jubilee Line — Clive's Underground Line Guides", "url": "http://www.davros.org/rail/culg/jubilee.html#dates", "via": "https://en.wikipedia.org/wiki/Jubilee_line" } ], "stationCount": 3 }, { "confidence": "high", "constructionStart": "1993", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": false, "value": 3500000000, "year": 1999 }, "notes": "£3.5 billion is the final construction cost of the ENTIRE Jubilee Line Extension (Green Park–Stratford, 16 km, all 11 new stations), NOT this stage alone. Original budget at Royal Assent (March 1992) also cited as £3.5 billion. Construction officially began 8 December 1993 at Canary Wharf. [Citation chase 2026-06-11] The £3.5bn figure is the final out-turn cost (railway-technology.com: \"Costing a total of £3.5bn when completed\"; LRB: \"twice as much as it was supposed to\"). Note correction: the original pre-construction estimate was ~£2.1bn (Major's Dec 1993 ceremony quote: \"nearly £2 billion\"), not £3.5bn — the project roughly doubled over its lifetime.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260203072128/https://en.wikipedia.org/wiki/Jubilee_line_extension", "kind": "wikipedia", "quote": "Construction of the project officially began on 8 December 1993, with a ceremony at Canary Wharf attended by Prime Minister John Major.", "tier": "tertiary", "title": "Jubilee Line Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260313225613/https://www.railway-technology.com/projects/london-jubilee-line-extension/", "kind": "other", "publisher": "Railway Technology", "quote": "Costing a total of £3.5bn when completed, the project had been expected to take just under three years to complete.", "tier": "secondary", "title": "London Underground Jubilee Line Extension — Railway Technology", "url": "https://www.railway-technology.com/projects/london-jubilee-line-extension/", "via": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260613162012/https://www.lrb.co.uk/the-paper/v27/n09/james-meek/crocodile-s-breath", "kind": "news", "publisher": "London Review of Books", "quote": "the Jubilee Line extension opened it was best known for costing £3.5 billion, twice as much as it was supposed to", "tier": "secondary", "title": "LRB · James Meek · Crocodile's Breath", "url": "https://web.archive.org/web/20110514044104/http://www.lrb.co.uk/v27/n09/james-meek/crocodiles-breath", "via": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" } ] }, "geometryRef": "london-Jubilee", "id": "london-jubilee-1999-jle-stage1", "kind": "extension", "label": { "en": "JLE Stage 1 opens: Stratford → North Greenwich (Jubilee Line Extension)" }, "notes": "Stratford is the eastern terminus beyond West Ham, not on the drawn spine; mapped to the on-spine West Ham→North Greenwich portion. [Date chase 2026-06-12] Official construction-start ceremony dated 8 December 1993 (first pile driven); note that tunnelling itself did not begin until August 1994 at North Greenwich, but the universally cited start date is the December 1993 ceremony.", "opened": "1999-05-14", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260203072128/https://en.wikipedia.org/wiki/Jubilee_line_extension", "kind": "wikipedia", "quote": "The first phase of the extension from Stratford to North Greenwich was opened by the Deputy Prime Minister John Prescott on 14 May 1999.", "tier": "tertiary", "title": "Jubilee Line Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260203072128/https://en.wikipedia.org/wiki/Jubilee_line_extension", "kind": "wikipedia", "quote": "Construction of the project officially began on 8 December 1993, with a ceremony at Canary Wharf attended by Prime Minister John Major.", "tier": "tertiary", "title": "Jubilee Line Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-12", "kind": "primary", "publisher": "John Major Archive", "quote": "I'm here now for the start of work on another vital transport link for Docklands and for London. [...] if I press the button in front of me, this huge crane will drive the first pile into the ground.", "tier": "primary", "title": "Mr Major's Comments at Jubilee Line Extension Inaugural Ceremony – 8 December 1993", "url": "https://www.johnmajorarchive.org.uk/1993/mr-majors-comments-at-jubilee-line-extension-inaugural-ceremony-8-december-1993/", "via": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-13", "kind": "news", "publisher": "BBC News", "quote": "Friday, May 14, 1999 Published at 09:07 GMT 10:07 UK. Deputy Prime Minister John Prescott has opened the Jubilee Line's much-delayed first section, marking the occasion with a seven-minute rail ride to the Millennium Dome.", "tier": "secondary", "title": "Prescott launches Dome tube link", "url": "https://web.archive.org/web/20230324/https://news.bbc.co.uk/2/hi/uk_news/343506.stm", "via": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/jubilee.html", "kind": "other", "publisher": "davros.org (Clive Feather)", "quote": "1999-05-14 North Greenwich to Canning Town (1) opened; Canning Town (1) to Stratford started", "tier": "tertiary", "title": "Jubilee Line — Clive's Underground Line Guides", "url": "http://www.davros.org/rail/culg/jubilee.html#dates", "via": "https://en.wikipedia.org/wiki/Jubilee_line" } ], "stationCount": 4 }, { "confidence": "medium", "geometryRef": "london-Jubilee", "id": "london-jubilee-1999-jle-stage2", "kind": "extension", "label": { "en": "JLE Stage 2 opens: North Greenwich → Bermondsey (Canada Water, Canary Wharf, Bermondsey)" }, "notes": "[Opening-date chase 2026-06-13] Canary Wharf and Canada Water partially opened 17 Sep 1999 per Clive's Underground Line Guides; the curated 24 Sep 1999 is the date the full North Greenwich-Bermondsey segment as labelled was complete (Wikipedia, citing Horne 2000 p.80).", "opened": "1999-09-24", "segment": { "fromStopIndex": 2, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260203072128/https://en.wikipedia.org/wiki/Jubilee_line_extension", "kind": "wikipedia", "quote": "The second phase between North Greenwich and Bermondsey opened on 24 September 1999.", "tier": "tertiary", "title": "Jubilee Line Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/jubilee.html", "kind": "other", "publisher": "davros.org (Clive Feather)", "quote": "1999-09-17 Bermondsey to North Greenwich opened; 1999-09-24 Waterloo to Bermondsey opened", "tier": "tertiary", "title": "Jubilee Line — Clive's Underground Line Guides", "url": "http://www.davros.org/rail/culg/jubilee.html#dates", "via": "https://en.wikipedia.org/wiki/Jubilee_line" } ], "stationCount": 3 }, { "confidence": "high", "geometryRef": "london-Jubilee", "id": "london-jubilee-1999-jle-stage3", "kind": "extension", "label": { "en": "JLE Stage 3 opens: Bermondsey → Green Park, linking the extension to the rest of the line (London Bridge, Southwark, Waterloo); Charing Cross dropped from passenger service" }, "notes": "On linking through to Green Park, the original Charing Cross–Green Park section ceased passenger use (retained for emergency/reversing). [Opening-date chase 2026-06-13] This 'final phase' opening explicitly excluded Westminster (still under refurbishment per the BBC report), matching the separate Westminster phase; Charing Cross was withdrawn from Jubilee service the previous day (19 Nov 1999).", "opened": "1999-11-20", "segment": { "fromStopIndex": 5, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260203072128/https://en.wikipedia.org/wiki/Jubilee_line_extension", "kind": "wikipedia", "quote": "The extension was linked to the rest of the Jubilee line with the opening of the final phase on 20 November 1999.", "tier": "tertiary", "title": "Jubilee Line Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516153506/https://en.wikipedia.org/wiki/Jubilee_line", "kind": "wikipedia", "quote": "The section between Charing Cross and Green Park, which diverges to the northwest, is now unused for passenger services but is maintained for emergency use.", "tier": "tertiary", "title": "Jubilee line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162014/http://news.bbc.co.uk/2/hi/uk_news/529006.stm", "kind": "news", "publisher": "BBC News", "quote": "Saturday, 20 November, 1999, 09:44 GMT. Jubilee Line finally opens. The final section of London Underground's Jubilee Line extension has opened, linking London to the Millennium Dome. The first train from Stratford in the south east of the city drove through to West Hampstead in the north at 0510 GMT on Saturday. ... But Westminster station, still undergoing refurbishment, will not re-open to Jubilee Line trains until next year.", "tier": "secondary", "title": "Jubilee Line finally opens", "url": "https://web.archive.org/web/20230324/https://news.bbc.co.uk/2/hi/uk_news/529006.stm", "via": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/jubilee.html", "kind": "other", "publisher": "davros.org (Clive Feather)", "quote": "1999-11-19 Green Park to Charing Cross closed; 1999-11-20 Green Park to Waterloo opened; Southwark [opened]", "tier": "tertiary", "title": "Jubilee Line — Clive's Underground Line Guides", "url": "http://www.davros.org/rail/culg/jubilee.html#dates", "via": "https://en.wikipedia.org/wiki/Jubilee_line" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": "london-Jubilee", "id": "london-jubilee-1999-westminster", "kind": "extension", "label": { "en": "JLE final station opens: Westminster" }, "opened": "1999-12-22", "segment": { "fromStopIndex": 9, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260203072128/https://en.wikipedia.org/wiki/Jubilee_line_extension", "kind": "wikipedia", "quote": "Westminster – complicated by the interface with the subsurface platforms, which remained in operation during construction – opened on 22 December 1999, shortly before the Millennium Dome deadline.", "tier": "tertiary", "title": "Jubilee Line Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/jubilee.html", "kind": "other", "publisher": "davros.org (Clive Feather)", "quote": "1999-12-22 Westminster [opened]", "tier": "tertiary", "title": "Jubilee Line — Clive's Underground Line Guides", "url": "http://www.davros.org/rail/culg/jubilee.html#dates", "via": "https://en.wikipedia.org/wiki/Jubilee_line" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516153506/https://en.wikipedia.org/wiki/Jubilee_line", "kind": "wikipedia", "tier": "tertiary", "title": "Jubilee line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260203072128/https://en.wikipedia.org/wiki/Jubilee_line_extension", "kind": "wikipedia", "tier": "tertiary", "title": "Jubilee Line Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" } ] }, { "cityId": "london", "color": "#9B0056", "displayNumber": "Metropolitan", "id": "london-line-metropolitan", "name": { "en": "Metropolitan line (Liverpool Street ↔ Chalfont & Latimer)" }, "phases": [ { "confidence": "medium", "constructionStart": "1860", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": false, "value": 1300000, "year": 1862 }, "notes": "Final construction cost of the original Paddington–Farringdon line; initial estimate ~£1 million, rose during construction. 3.75-mile cut-and-cover line.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "By the end of 1862, work was complete at a cost of £1.3 million.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, "geometryRef": "london-Metropolitan", "id": "london-metropolitan-1863-initial", "kind": "initial", "label": { "en": "Initial line opens: Paddington (Bishop's Road) → Farringdon Street (world's first underground railway)" }, "notes": "The original Paddington→Farringdon line; Paddington and Edgware Road are not on the drawn Metropolitan spine, so this maps to the on-spine Farringdon→Baker Street portion (King's Cross, Euston Square, Great Portland Street). [Date chase 2026-06-12] Construction began March 1860 per Metropolitan Railway Wikipedia (Day & Reed 2008, p.10), confirming the curated 1860 start. [Opening-date chase 2026-06-13] Ceremonial/VIP opening (banquet for 600 shareholders) was 9 Jan 1863; public revenue service began 10 Jan 1863. Curated date is the public opening.", "opened": "1863-01-10", "segment": { "fromStopIndex": 3, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "The 3.75-mile (6 km) railway opened to the public on 10 January 1863", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425162651/https://en.wikipedia.org/wiki/Metropolitan_line", "kind": "wikipedia", "quote": "The world's first underground railway, it opened on 10 January 1863 with gas-lit wooden carriages hauled by steam locomotives.", "tier": "tertiary", "title": "Metropolitan line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_line" } ], "stationCount": 7 }, { "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1864-hammersmith", "kind": "extension", "label": { "en": "Hammersmith & City extension opens: to Hammersmith (via Notting Hill, Shepherd's Bush)" }, "notes": "On the Hammersmith & City branch (now a separate line), not on the drawn Metropolitan spine.", "opened": "1864-06-13", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "opened on 13 June 1864 with stations at Notting Hill, Shepherd's Bush, and Hammersmith", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": "london-Metropolitan", "id": "london-metropolitan-1865-moorgate", "kind": "extension", "label": { "en": "Eastward extension opens: Farringdon Street → Moorgate Street" }, "opened": "1865-12-23", "segment": { "fromStopIndex": 1, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "had opened on 23 December 1865", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1868-swiss-cottage", "kind": "extension", "label": { "en": "Metropolitan & St John's Wood Railway opens: Baker Street → Swiss Cottage" }, "notes": "The Baker Street→Swiss Cottage stub runs onto the former St John's Wood line (now the Jubilee); Swiss Cottage is not on the drawn Metropolitan spine.", "opened": "1868-04-13", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1868-04-13 Swiss Cottage to Baker Street opened with through running to the Circle", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "opened a single-track railway in tunnel to Swiss Cottage from new platforms at Baker Street...In April 1868", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "constructionStart": "1873", "geometryRef": "london-Metropolitan", "id": "london-metropolitan-1875-liverpool-street", "kind": "extension", "label": { "en": "City extension opens: Moorgate → Liverpool Street (junction with the GER)" }, "notes": "[Date chase 2026-06-12] Eastward City extension begun 1873 per Metropolitan Railway Wikipedia (Jackson 1986, pp.69-71), confirming the curated 1873 start; opened to Liverpool Street 1 Feb 1875.", "opened": "1875-02-01", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "The first section opened to the Great Eastern Railway's (GER's) recently opened terminus at Liverpool Street on 1 February 1875.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": "london-Metropolitan#2", "id": "london-metropolitan-1876-aldgate", "kind": "extension", "label": { "en": "Aldgate terminus opens: Liverpool Street → Aldgate" }, "notes": "Liverpool Street (index 19) → Aldgate (index 20) on the Uxbridge-arm sub-spine, which carries the Aldgate terminus on its shared central trunk. [Opening-date chase 2026-06-13] Aldgate opened 18 Nov 1876 initially as a shuttle to Bishopsgate; all Met and District trains worked through from 4 Dec 1876.", "opened": "1876-11-18", "segment": { "fromStopIndex": 19, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "A terminus opened at Aldgate on 18 November 1876, initially for a shuttle service to Bishopsgate before all Met and District trains worked through from 4 December.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "london-Metropolitan", "id": "london-metropolitan-1880-extension-line", "kind": "extension", "label": { "en": "Extension Line opens: Swiss Cottage → West Hampstead → Willesden Green → Harrow-on-the-Hill (staged 1879–1880)" }, "notes": "Staged: Swiss Cottage–West Hampstead 30 Jun 1879; West Hampstead–Willesden Green 24 Nov 1879; Willesden Green–Harrow-on-the-Hill 2 Aug 1880. Swiss Cottage and the inner West Hampstead/Willesden Green stations are off the drawn spine; mapped to the on-spine Finchley Road→Harrow-on-the-Hill portion. [Opening-date chase 2026-06-13] Staged opening: West Hampstead (single line) 30 Jun 1879, Willesden Green (double track, full service) 24 Nov 1879, Harrow service from Baker Street 2 Aug 1880 (curated final completion).", "opened": "1880-08-02", "segment": { "fromStopIndex": 7, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1880-08-02 Harrow-on-the-Hill to Willesden Green opened", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "To serve the Royal Agricultural Society's 1879 show at Kilburn, a single line to West Hampstead opened on 30 June 1879 with a temporary platform at Finchley Road. Double track and a full service to Willesden Green started on 24 November 1879 with a station at Kilburn & Brondesbury. The line was extended 5 miles 37.5 chains to Harrow, the service from Baker Street beginning on 2 August 1880.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1884-inner-circle", "kind": "extension", "label": { "en": "Inner Circle completed: through circular service begins (jointly worked with the District)" }, "notes": "Ceremonial opening 17 September 1884; full circular service began 6 October 1884. The Inner Circle is the shared Circle trackage, not the drawn Metropolitan (Aldgate→Amersham) spine. [Opening-date chase 2026-06-13] Official opening ceremony 17 Sep 1884; public circular revenue service began 6 Oct 1884 (curated date).", "opened": "1884-10-06", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "After an official opening ceremony on 17 September and trial running a circular service started on Monday 6 October 1884.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": "london-Metropolitan", "id": "london-metropolitan-1885-pinner", "kind": "extension", "label": { "en": "Extension opens: Harrow-on-the-Hill → Pinner" }, "opened": "1885-05-25", "segment": { "fromStopIndex": 12, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1885-05-25 Pinner to Harrow-on-the-Hill opened", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "Pinner was reached in 1885 and an hourly service from Rickmansworth and Northwood to Baker Street started on 1 September 1887.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "london-Metropolitan", "id": "london-metropolitan-1887-rickmansworth", "kind": "extension", "label": { "en": "Extension opens: Pinner → Rickmansworth (via Northwood, Chorley Wood)" }, "opened": "1887-09-01", "segment": { "fromStopIndex": 14, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1887-09-01 Rickmansworth to Pinner opened", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "an hourly service from Rickmansworth and Northwood to Baker Street started on 1 September 1887.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": "london-Metropolitan", "id": "london-metropolitan-1889-chesham", "kind": "extension", "label": { "en": "Extension opens: Rickmansworth → Chesham (via Chalfont Road)" }, "notes": "Chesham itself is on the Chesham branch, off the drawn spine; mapped to the on-spine Rickmansworth→Chalfont & Latimer portion.", "opened": "1889-07-08", "segment": { "fromStopIndex": 18, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1889-07-08 Chesham to Rickmansworth opened", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "Services to Chesham calling at Chorley Wood and Chalfont Road (now Chalfont & Latimer) started on 8 July 1889.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1891-verney-junction", "kind": "extension", "label": { "en": "Metropolitan begins working Aylesbury → Verney Junction (former Aylesbury & Buckingham Railway)" }, "notes": "Aylesbury–Verney Junction lies far beyond Amersham, off the drawn spine. Originally the Aylesbury & Buckingham Railway (1868); the Met began working it 1 July 1891. [Opening-date chase 2026-06-13] 1 Jul 1891 is the Met takeover of the Aylesbury & Buckingham Railway (start of Met working to Verney Junction).", "opened": "1891-07-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1891-07-01 Verney Junction to Aylesbury (1) started [Metropolitan]", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "The Met took over the A&BR on 1 July 1891", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1892-amersham-aylesbury", "kind": "extension", "label": { "en": "Extension opens: Chalfont & Latimer → Amersham → Aylesbury" }, "notes": "Amersham and Aylesbury lie beyond Chalfont & Latimer (the spine's outer end), off the drawn spine. Connection into the joint Aylesbury station opened 1 January 1894.", "opened": "1892-09-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1892-09-01 Aylesbury (2) to Amersham opened\" and \"Amersham to Chalfont & Latimer opened", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "a temporary platform at Aylesbury opened on 1 September 1892 with trains calling at Amersham, Great Missenden, Wendover and Stoke Mandeville.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1899-brill", "kind": "extension", "label": { "en": "Brill branch absorbed: Metropolitan begins working Quainton Road → Brill (former Wotton Tramway)" }, "notes": "The Brill branch (former Wotton Tramway) lies beyond Aylesbury, far off the drawn spine. [Opening-date chase 2026-06-13] MR took over Brill Tramway operations 1 Dec 1899 (Brill Tramway article, citing Melton 1984 p.64); the Met Railway article's vaguer 'November 1899' is less precise.", "opened": "1899-12-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1899-12-01 Brill to Quainton Road (MR) started [Metropolitan]", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Brill_Tramway", "kind": "other", "publisher": "Wikipedia", "quote": "From 1 December 1899, the MR took over all operations.", "tier": "tertiary", "title": "Brill Tramway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Brill_Tramway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "it took over operations in November 1899", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": "london-Metropolitan#2", "id": "london-metropolitan-1904-uxbridge", "kind": "extension", "label": { "en": "Uxbridge branch opens: Harrow-on-the-Hill → Uxbridge" }, "notes": "Mapped to the Uxbridge-arm sub-spine, Harrow-on-the-Hill (index 7) down to Hillingdon (index 0); Uxbridge itself is the terminus just beyond the drawn end. Electrified the following year (through electric Uxbridge–Baker Street service from 1 January 1905). [Opening-date chase 2026-06-13] Two Wikipedia articles (Harrow and Uxbridge Railway; Uxbridge tube station) confirm 4 Jul 1904; the Met Railway article's 30 Jun 1904 appears to be an error.", "opened": "1904-07-04", "segment": { "fromStopIndex": 0, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1904-07-04 Uxbridge to Harrow-on-the-Hill opened", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123444/https://en.wikipedia.org/wiki/Uxbridge_tube_station", "kind": "wikipedia", "quote": "first opened a station in Uxbridge on 4 July 1904", "tier": "tertiary", "title": "Uxbridge tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Uxbridge_tube_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251115201221/https://en.wikipedia.org/wiki/Harrow_and_Uxbridge_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "Services on the branch opened on 4 July 1904, with the first service on the line being headed by the steam locomotive Met Loco No. 1, bedecked in bunting.", "tier": "tertiary", "title": "Harrow and Uxbridge Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Harrow_and_Uxbridge_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": "london-Metropolitan#3", "id": "london-metropolitan-1925-watford", "kind": "extension", "label": { "en": "Watford branch opens: Moor Park → Watford (with Croxley junction)" }, "notes": "Mapped to the Watford-arm sub-spine: Watford (index 0), Croxley (1), branching off at Moor Park (index 2). [Opening-date chase 2026-06-13] 1-day source conflict: 2 Nov (Watford station article + Davros) vs 3 Nov (Met Railway article); curated 2 Nov backed by the station-specific chronology source.", "opened": "1925-11-02", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1925-11-02 Rickmansworth to Croxley opened\" and \"Watford to Moor Park opened", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425162651/https://en.wikipedia.org/wiki/Metropolitan_line", "kind": "wikipedia", "quote": "A short branch opened from Rickmansworth to Watford in 1925.", "tier": "tertiary", "title": "Metropolitan line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260130012334/https://en.wikipedia.org/wiki/Watford_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Watford MR station opened on 2 November 1925, with Metropolitan Railway electric trains to Baker Street and LNER steam trains to Marylebone for the first few months.", "tier": "tertiary", "title": "Watford tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Watford_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "Services started on 3 November 1925 with one intermediate station at Croxley Green", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1932-stanmore", "kind": "extension", "label": { "en": "Stanmore branch opens: Wembley Park → Stanmore" }, "notes": "On the Stanmore branch (transferred to the Bakerloo in 1939, now the Jubilee), off the drawn Metropolitan spine. [Opening-date chase 2026-06-13] 1-day source conflict: 10 Dec (Stanmore station article + Davros) vs 9 Dec (Met Railway article); curated 10 Dec backed by the station-specific source.", "opened": "1932-12-10", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1932-12-10 Stanmore to Wembley Park opened", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425162651/https://en.wikipedia.org/wiki/Metropolitan_line", "kind": "wikipedia", "quote": "After World War I, the 4-mile (6.4 km) Stanmore branch was built from Wembley Park.", "tier": "tertiary", "title": "Metropolitan line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260104160732/https://en.wikipedia.org/wiki/Stanmore_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Stanmore station was opened on 10 December 1932 by the Metropolitan Railway (now the Metropolitan line).", "tier": "tertiary", "title": "Stanmore tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Stanmore_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "closed": "1936-07-04", "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1936-verney-closure", "kind": "extension", "label": { "en": "Northern outer section closes: Aylesbury → Verney Junction / Quainton Road withdrawn (and Brill branch closed 1935)" }, "notes": "Closure under the LPTB: Brill branch closed 30 November 1935; services beyond Aylesbury withdrawn 4 July 1936. All off the drawn spine.", "opened": "1936-07-04", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1936-07-04 Verney Junction to Quainton Road (MR) closed\" and \"Quainton Road (MR) to Aylesbury (1) withdrawn", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425162651/https://en.wikipedia.org/wiki/Metropolitan_line", "kind": "wikipedia", "quote": "All services north-west of Aylesbury were withdrawn by 1936", "tier": "tertiary", "title": "Metropolitan line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_line" } ] }, { "closed": "1939-11-19", "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1939-stanmore-transfer", "kind": "renumber", "label": { "en": "Stanmore branch transferred to the Bakerloo line: Wembley Park → Stanmore Met service withdrawn" }, "notes": "Reassignment, not track closure: the Stanmore branch passed from the Metropolitan to the Bakerloo line on 19 November 1939 (later to the Jubilee, 1979). Off the drawn spine. [Opening-date chase 2026-06-13] 1-day source conflict on the Bakerloo transfer date: 19 Nov (Davros, curated) vs 20 Nov (Stanmore station article).", "opened": "1939-11-19", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1939-11-19 Stanmore to Wembley Park withdrawn", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260104160732/https://en.wikipedia.org/wiki/Stanmore_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Stanmore branch of the Metropolitan line with its five stopping stations between Finchley Road and Wembley Park was transferred to the Bakerloo line on 20 November 1939.", "tier": "tertiary", "title": "Stanmore tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Stanmore_tube_station", "via": "https://en.wikipedia.org/wiki/Stanmore_tube_station" } ] }, { "closed": "1961-09-10", "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1961-amersham-cutback", "kind": "extension", "label": { "en": "Aylesbury services transferred to British Railways; Met cut back to Amersham (Rickmansworth–Amersham electrified)" }, "notes": "Met electric services cut back to Amersham/Chesham; Aylesbury services went to British Railways. Amersham and the withdrawn section lie beyond Chalfont & Latimer, off the drawn spine.", "opened": "1961-09-10", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1961-09-10 Aylesbury (1) to Amersham withdrawn", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425162651/https://en.wikipedia.org/wiki/Metropolitan_line", "kind": "wikipedia", "quote": "The rebuilding electrified the line from Rickmansworth to Amersham, transferring all Aylesbury services to British Railways.", "tier": "tertiary", "title": "Metropolitan line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425162651/https://en.wikipedia.org/wiki/Metropolitan_line", "kind": "wikipedia", "tier": "tertiary", "title": "Metropolitan line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" } ] }, { "cityId": "london", "color": "#000000", "displayNumber": "Northern", "id": "london-line-northern", "name": { "en": "Northern line (South Wimbledon ↔ Totteridge & Whetstone)" }, "phases": [ { "confidence": "low", "constructionStart": "1886", "geometryRef": "london-Northern", "id": "london-northern-1890-cslr-initial", "kind": "initial", "label": { "en": "C&SLR opens: King William Street → Stockwell (world's first deep-level electric tube)" }, "notes": "The original King William Street terminus (closed 1900) is off the drawn spine; mapped to the on-spine Stockwell→Borough portion (Oval, Kennington, Elephant & Castle). [Date chase 2026-06-12] C&SLR article confirms original-route construction began in 1886; the 1887 Kennington Extensions Act extended work already underway. [Opening-date chase 2026-06-13] Official ceremonial opening was 4 Nov 1890; public revenue service began 18 Dec 1890 (curated date).", "opened": "1890-12-18", "segment": { "fromStopIndex": 8, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "Official Opening: November 4, 1890 (by Edward, Prince of Wales); Public Opening: December 18, 1890; Original Route: King William Street to Stockwell, 3.2 miles across 6 stations", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" } ], "stationCount": 6 }, { "closed": "1900-02-26", "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1900-bank-reroute", "kind": "extension", "label": { "en": "C&SLR northern reroute opens: London Bridge → Moorgate via Bank (King William Street terminus closed)" }, "opened": "1900-02-26", "segment": { "fromStopIndex": 13, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "the first section of the northern extension opened on Monday 26 February 1900 with stations at London Bridge, Bank, and Moorgate Street.", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1900-clapham-common", "kind": "extension", "label": { "en": "C&SLR southern extension opens: Stockwell → Clapham Common (Clapham Road + Clapham Common)" }, "opened": "1900-06-03", "segment": { "fromStopIndex": 6, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123457/https://en.wikipedia.org/wiki/City_%26_South_London_Railway", "kind": "wikipedia", "quote": "Southern Extension (June 3, 1900): Clapham Road and Clapham Common stations added", "tier": "tertiary", "title": "City & South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_%26_South_London_Railway" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1901-angel", "kind": "extension", "label": { "en": "C&SLR Angel extension opens: Moorgate → Angel (Old Street, City Road, Angel)" }, "notes": "City Road station (between Old Street and Angel) later closed and is not on the spine; the served section runs Moorgate→Angel.", "opened": "1901-11-17", "segment": { "fromStopIndex": 15, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "the rest of the extension opened on 17 November 1901 with stations at Old Street, City Road, and Angel.", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" } ], "stationCount": 3 }, { "confidence": "low", "constructionStart": "1903", "geometryRef": "london-Northern#2", "id": "london-northern-1907-ccehr-initial", "kind": "initial", "label": { "en": "CCE&HR ('Hampstead Tube') opens: Charing Cross (Strand) → Golders Green & Archway (Highgate)" }, "notes": "Mapped to the Edgware/Charing Cross-arm sub-spine, Golders Green (index 4) through Charing Cross (index 15); the Archway arm of the Hampstead Tube runs on the main Northern spine and cannot be captured in the same segment. A placeholder cost (the UERL's £18M all-projects capital) was dropped on review as not a per-line build cost. [Opening-date chase 2026-06-13] 22 June 1907 was both the official opening (Lloyd George) and the start of public service — the public travelled free for the rest of the day.", "opened": "1907-06-22", "segment": { "fromStopIndex": 4, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122153/https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway", "kind": "wikipedia", "quote": "The official opening on 22 June 1907 was made by David Lloyd George, President of the Board of Trade.", "tier": "tertiary", "title": "Charing Cross, Euston and Hampstead Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122153/https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway", "kind": "wikipedia", "quote": "Tunnelling began in September 1903 ... Tunnelling was completed in December 1905", "tier": "tertiary", "title": "Charing Cross, Euston and Hampstead Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122153/https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway", "kind": "wikipedia", "quote": "16 stations across two branches ... Main line and Golders Green branch: 12 stations; Highgate branch: 4 stations (including South Kentish Town, which closed in 1924)", "tier": "tertiary", "title": "Charing Cross, Euston and Hampstead Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway" } ], "stationCount": 16 }, { "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1907-euston", "kind": "extension", "label": { "en": "C&SLR Euston extension opens: Angel → Euston (King's Cross + Euston)" }, "opened": "1907-05-12", "segment": { "fromStopIndex": 17, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "the Euston extension was quickly built and opened on 12 May 1907 with stations at King's Cross and Euston.", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "london-Northern#2", "id": "london-northern-1914-embankment", "kind": "extension", "label": { "en": "CCE&HR south extension opens: Charing Cross (Strand) → Charing Cross/Embankment" }, "notes": "Charing Cross (index 15) → Embankment (index 16) on the Charing Cross-arm sub-spine.", "opened": "1914-04-06", "segment": { "fromStopIndex": 15, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122153/https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway", "kind": "wikipedia", "quote": "1914 Embankment Extension: Opening Date: 6 April 1914 ... Single-platform interchange station constructed via loop tunnel under the Thames.", "tier": "tertiary", "title": "Charing Cross, Euston and Hampstead Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway" } ], "stationCount": 1 }, { "confidence": "medium", "constructionStart": "1922", "geometryRef": "london-Northern#2", "id": "london-northern-1923-hendon-central", "kind": "extension", "label": { "en": "CCE&HR Edgware extension (Stage 1) opens: Golders Green → Hendon Central" }, "notes": "Mapped to the Edgware-arm sub-spine: Golders Green (index 4) → Brent Cross (3) → Hendon Central (index 2). [Date chase 2026-06-12] Ceremonial first sod for the Edgware extension was cut at Golders Green on 12 June 1922.", "opened": "1923-11-19", "segment": { "fromStopIndex": 2, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260418003810/https://en.wikipedia.org/wiki/Hendon_Central_tube_station", "kind": "wikipedia", "quote": "the first section of the extension, as far as Hendon Central opened on 19 November 1923. This stage included Brent Cross (then called Brent) tube station.", "tier": "tertiary", "title": "Hendon Central tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hendon_Central_tube_station" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "quote": "It extended the CCE&HR line from its terminus at Golders Green to Hendon Central in 1923 and to Edgware in 1924.", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260604122153/https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "Lord Ashfield's group ceremonially cut the first sod to begin the works at Golders Green on 12 June 1922.", "tier": "secondary", "title": "Charing Cross, Euston and Hampstead Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway", "via": "https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway" } ], "stationCount": 2 }, { "closed": "1922-08-08", "confidence": "medium", "constructionStart": "1922", "geometryRef": "london-Northern", "id": "london-northern-1924-euston-camden-link", "kind": "reopening", "label": { "en": "C&SLR reconstruction complete + Camden Town link: Euston → Moorgate reopens with new Euston–Camden Town tunnels" }, "notes": "Euston→Moorgate reopened 20 April 1924 along with the new Euston→Camden Town tunnels; mapped to the on-spine Moorgate→Camden Town portion.", "opened": "1924-04-20", "segment": { "fromStopIndex": 15, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "The northern section of the C&SLR between Euston and Moorgate was closed from 8 August 1922 ... The Euston to Moorgate section reopened on 20 April 1924, along with the new tunnels linking Euston to Camden Town", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "other", "publisher": "Wikipedia", "quote": "Construction began in 1922 and this first tunnel opened in 1924.", "tier": "secondary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line", "via": "https://en.wikipedia.org/wiki/Northern_line" } ] }, { "closed": "1923-11-28", "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1924-clapham-reopen", "kind": "reopening", "label": { "en": "C&SLR southern section (Moorgate → Clapham Common) reopens after tunnel enlargement" }, "opened": "1924-12-01", "segment": { "fromStopIndex": 6, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "The rest of the line to Clapham Common reopened on 1 December 1924", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" } ] }, { "confidence": "medium", "geometryRef": "london-Northern#2", "id": "london-northern-1924-edgware", "kind": "extension", "label": { "en": "CCE&HR Edgware extension (Stage 2) opens: Hendon Central → Edgware (Colindale, Burnt Oak, Edgware)" }, "notes": "Mapped to the Edgware-arm sub-spine: Hendon Central (index 2) → Colindale (1) → Burnt Oak (index 0); Edgware itself is the terminus just beyond the drawn end. [Opening-date chase 2026-06-13] Segment opened 18 Aug 1924 (Colindale, Edgware); Burnt Oak station opened later on 27 Oct 1924.", "opened": "1924-08-18", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "quote": "It extended the CCE&HR line from its terminus at Golders Green to Hendon Central in 1923 and to Edgware in 1924.", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" }, { "accessedAt": "2026-06-09", "kind": "other", "quote": "the extension opened to Edgware with an intermediate stop at Colindale on 18th August 1924.", "tier": "tertiary", "title": "Golders Green / Edgware extension — UK Transport Wiki", "url": "https://uktransport.fandom.com/wiki/Golders_Green_tube_station" } ], "stationCount": 3 }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "low", "nominal": { "currency": "GBP", "isEstimate": true, "value": 5000000, "year": 1926 }, "notes": "Morden extension cost ~£5M (secondary source ianVisits / LT Museum), employing ~4,600 men, partly funded by a government employment scheme. Approximate. The same date brought into service the Embankment–Kennington connecting tunnels (with new station at Waterloo) merging the C&SLR and CCE&HR; that cost is not separately sourced. [Citation chase 2026-06-11] The £5M figure rests on a single secondary source (a short 2016 ianVisits anniversary blog post) with no inline citations or traceable primary source; it reads as a rounded actual-cost (outturn) figure for the Morden extension. Curated \"high\" confidence is not supported by the evidence.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20240624162607/https://www.ianvisits.co.uk/articles/90th-anniversary-of-the-northern-line-extension-18617/", "kind": "news", "quote": "The extension cost around £5 million to build, and employed some 4,600 men — at a time of high unemployment.", "tier": "secondary", "title": "90th anniversary of the Northern Line extension — ianVisits", "url": "https://www.ianvisits.co.uk/articles/90th-anniversary-of-the-northern-line-extension-18617/" } ] }, "geometryRef": "london-Northern", "id": "london-northern-1926-morden", "kind": "extension", "label": { "en": "Morden extension opens: Clapham Common → Morden + Embankment–Kennington link (Waterloo) joining the two railways" }, "notes": "Clapham Common→Morden mapped to the on-spine Clapham Common→South Wimbledon portion; Morden itself is the terminus just beyond the drawn spine, and the Embankment–Kennington link runs partly on the off-spine Charing Cross branch.", "opened": "1926-09-13", "segment": { "fromStopIndex": 0, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "The Morden extension opened on 13 September 1926", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "Also on 13 September 1926, a further connection between the CCE&HR and the C&SLR was opened when tunnels were brought into service from the CCE&HR's Charing Cross station (now Embankment) to Kennington station ... An intermediate station was constructed at Waterloo.", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20240624162607/https://www.ianvisits.co.uk/articles/90th-anniversary-of-the-northern-line-extension-18617/", "kind": "news", "quote": "The extension cost around £5 million to build, and employed some 4,600 men — at a time of high unemployment.", "tier": "secondary", "title": "90th anniversary of the Northern Line extension — ianVisits", "url": "https://www.ianvisits.co.uk/articles/90th-anniversary-of-the-northern-line-extension-18617/" } ], "stationCount": 7 }, { "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1926-balham", "kind": "extension", "label": { "en": "Balham station opens (Morden extension intermediate station, delayed)" }, "opened": "1926-12-06", "segment": { "fromStopIndex": 4, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "Balham (opened on 6 December 1926)", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1937-renamed", "kind": "renumber", "label": { "en": "Combined Morden–Edgware line renamed the 'Northern line'" }, "notes": "Identity/renaming event covering the whole then-existing network. [Opening-date chase 2026-06-13] This phase records an administrative renaming (Morden–Edgware line to Northern line), not a new revenue-service opening.", "opened": "1937-08-28", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "quote": "the Morden–Edgware line was renamed as the Northern line on 28 August 1937.", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" } ] }, { "confidence": "low", "constructionStart": "1936", "geometryRef": "london-Northern", "id": "london-northern-1939-east-finchley", "kind": "extension", "label": { "en": "Northern Heights: tube service extended Archway → East Finchley (new tunnels; Highgate deep-level platforms skipped)" }, "notes": "Initial service skipped the Highgate deep-level platforms (index 24) until 1941; mapped to the Archway→East Finchley span.", "opened": "1939-07-03", "segment": { "fromStopIndex": 23, "toStopIndex": 25 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "quote": "an initial service to the rebuilt East Finchley station commenced on 3 July 1939, though trains skipped the deep-level platforms at Highgate until its fitout was completed by 19 January 1941.", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1940-high-barnet", "kind": "extension", "label": { "en": "Northern Heights: High Barnet branch electrified — tube service East Finchley → High Barnet" }, "notes": "High Barnet is the branch terminus just beyond the drawn spine; mapped to the on-spine East Finchley→Totteridge & Whetstone portion.", "opened": "1940-04-14", "segment": { "fromStopIndex": 25, "toStopIndex": 29 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "quote": "the electrification of the High Barnet branch, over which tube services started on 14 April 1940", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" } ], "stationCount": 6 }, { "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1941-highgate", "kind": "extension", "label": { "en": "Highgate deep-level platforms open to Northern line trains" }, "notes": "[Opening-date chase 2026-06-13] Deep-level platforms served from 19 Jan 1941 though not all new station buildings were complete (minor construction matter, not partial service).", "opened": "1941-01-19", "segment": { "fromStopIndex": 24, "toStopIndex": 24 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "quote": "trains skipped the deep-level platforms at Highgate until its fitout was completed by 19 January 1941.", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525193206/https://en.wikipedia.org/wiki/Highgate_tube_station", "kind": "wikipedia", "quote": "started serving the deep level platforms at Highgate on 19 January 1941", "tier": "tertiary", "title": "Highgate tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Highgate_tube_station" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": null, "id": "london-northern-1941-mill-hill-east", "kind": "reopening", "label": { "en": "Northern Heights: Finchley Central → Mill Hill East branch electrified and reopens as tube service" }, "notes": "Mill Hill East is on its own short branch off Finchley Central, not on the drawn spine.", "opened": "1941-05-18", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "quote": "the single-track LNER line to Edgware being electrified as far as Mill Hill East, reopening as a tube service on 18 May 1941", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" } ], "stationCount": 1 }, { "confidence": "medium", "constructionStart": "2015", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "GBP", "isEstimate": false, "value": 1100000000, "year": 2021 }, "notes": "Final outturn ~£1.1bn, reported £160M below budget. Some TfL/press sources cite £1.2bn for the wider programme. 3.2 km extension of the Charing Cross branch. [Citation chase 2026-06-11] Final cost confirmed by TfL primary press release (16 Sep 2021): £1.1bn, £160m under the £1.26bn budget authority (increased Jan 2016). The £1.2bn figure refers to the budget authority, not the outturn.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260613162016/https://en.wikipedia.org/wiki/Northern_line_extension", "kind": "wikipedia", "quote": "the extension opened on 20 September 2021 ... around £1.1 billion ... £160 million below budget", "tier": "tertiary", "title": "Northern line extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line_extension" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20251216102641/https://tfl.gov.uk/info-for/media/press-releases/2021/september/new-tube-map-unveiled-featuring-new-northern-line-stations-to-open-next-week-as-tube-extends-to-battersea-power-station", "kind": "primary", "publisher": "Transport for London", "quote": "TfL has delivered the Northern Line Extension £160m under budget, bringing its estimated final total cost to £1.1bn, despite the cost pressures brought about by the pandemic.", "tier": "primary", "title": "New Tube map unveiled featuring new Northern line stations to open next week as Tube extends to Battersea Power Station", "url": "https://tfl.gov.uk/info-for/media/press-releases/2021/september/new-tube-map-unveiled-featuring-new-northern-line-stations-to-open-next-week-as-tube-extends-to-battersea-power-station", "via": "https://en.wikipedia.org/wiki/Northern_line_extension" } ] }, "geometryRef": "london-Northern#2", "id": "london-northern-2021-battersea", "kind": "extension", "label": { "en": "Northern line extension opens: Kennington → Battersea Power Station (Nine Elms + Battersea Power Station)" }, "notes": "Mapped to the Charing Cross-arm sub-spine: Kennington (index 18) → Nine Elms (index 19); Battersea Power Station is the terminus just beyond the drawn end. [Date chase 2026-06-12] Formal groundbreaking ceremony held 23 November 2015 at Battersea Power Station; preparatory works also started in 2015.", "opened": "2021-09-20", "segment": { "fromStopIndex": 18, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260613162016/https://en.wikipedia.org/wiki/Northern_line_extension", "kind": "wikipedia", "quote": "the extension opened on 20 September 2021 ... around £1.1 billion ... £160 million below budget", "tier": "tertiary", "title": "Northern line extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line_extension" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "quote": "extended the Charing Cross branch of the line for 3.2 km (2.0 miles) from Kennington to Battersea Power Station, with an intermediate stop at Nine Elms ... construction began in 2015.", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260525193206/https://en.wikipedia.org/wiki/Northern_line_extension_to_Battersea", "kind": "other", "publisher": "Wikipedia", "quote": "Preparation works started on the route in 2015, with Mayor Boris Johnson officially starting construction on 23 November 2015 at a ceremony at Battersea Power Station.", "tier": "secondary", "title": "Northern line extension to Battersea — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line_extension_to_Battersea", "via": "https://en.wikipedia.org/wiki/Northern_line_extension_to_Battersea" } ], "stationCount": 2 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" } ] }, { "cityId": "london", "color": "#0019A8", "displayNumber": "Piccadilly", "id": "london-line-piccadilly", "name": { "en": "Piccadilly line (Hillingdon ↔ Oakwood)" }, "phases": [ { "confidence": "medium", "geometryRef": "london-Piccadilly", "id": "london-piccadilly-1906-initial", "kind": "initial", "label": { "en": "Initial opening: Finsbury Park → Hammersmith (Great Northern, Piccadilly and Brompton Railway)" }, "notes": "A tertiary-only £4M build cost was dropped on review as not a real per-line build cost.", "opened": "1906-12-15", "segment": { "fromStopIndex": 13, "toStopIndex": 30 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "This finalised route, between Finsbury Park and Hammersmith stations, was formally opened on 15 December 1906.", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20250818200450/https://railtransportinlondon.fandom.com/wiki/London_Underground_Piccadilly_Line", "kind": "other", "quote": "The GNP&BR was formally opened on 15 December 1906... The total length of the extension was 12 km (7.5 mi) and it cost £4 million to build.", "tier": "tertiary", "title": "London Underground Piccadilly Line — RailTransportinLondon Wiki", "url": "https://railtransportinlondon.fandom.com/wiki/London_Underground_Piccadilly_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260415100821/https://en.wikipedia.org/wiki/Great_Northern,_Piccadilly_and_Brompton_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "The official opening of the GNP&BR by David Lloyd George, President of the Board of Trade, took place on 15 December 1906.", "tier": "tertiary", "title": "Great Northern, Piccadilly and Brompton Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Great_Northern,_Piccadilly_and_Brompton_Railway", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "london-piccadilly-1907-aldwych", "kind": "extension", "label": { "en": "Aldwych branch opens: Holborn → Strand (later Aldwych)" }, "notes": "On the Aldwych branch (Holborn→Aldwych), off the drawn spine.", "opened": "1907-11-30", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "On 30 November 1907, the short branch from Holborn to the Strand (later renamed Aldwych) opened", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260605070450/https://en.wikipedia.org/wiki/Aldwych_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The GNP&BR's main route opened on 15 December 1906, but the Strand branch was not opened until 30 November 1907.", "tier": "tertiary", "title": "Aldwych tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Aldwych_tube_station", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" } ], "stationCount": 1 }, { "confidence": "low", "cost": { "basis": "estimate", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": true, "value": 2300000, "year": 1930 }, "notes": "Estimated £2.3 million covered the whole western programme (Hounslow West and South Harrow extensions plus associated works), not the South Harrow segment alone. Service ran largely over existing District Railway tracks taken over by the Piccadilly line.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "Extensions would instead be to Hounslow Barracks and South Harrow...with an estimated cost of £2.3 million.", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, "geometryRef": null, "id": "london-piccadilly-1932-south-harrow", "kind": "extension", "label": { "en": "Western extension begins: Piccadilly trains extended to South Harrow" }, "notes": "South Harrow is on the South Harrow branch beyond Rayners Lane, off the drawn spine. Cost was contested in research and settled by tiebreaker. [Opening-date chase 2026-06-13] Trial runs began 27 June 1932; public revenue service to South Harrow began 4 July 1932 (replaced District line services).", "opened": "1932-07-04", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "On 4 July 1932, services were extended to South Harrow", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, { "confidence": "low", "cost": { "basis": "estimate", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": true, "value": 4400000, "year": 1930 }, "notes": "Estimated £4.4 million was for the ENTIRE Finsbury Park–Cockfosters extension (all three stages, 7.6 mi), not this segment alone. Authorised under the 1930 Act. [Citation chase 2026-06-11] The £4.4m estimate traces to a single offline source (Horne 2007, p.66, via Wikipedia); no independent primary or government source corroborating the figure was found online, so confidence is capped at medium.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "it was estimated that ridership on the extension, which would cost £4.4 million", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, "geometryRef": "london-Piccadilly", "id": "london-piccadilly-1932-arnos-grove", "kind": "extension", "label": { "en": "Cockfosters extension Stage 1 opens: Finsbury Park → Arnos Grove (Manor House, Turnpike Lane, Wood Green, Bounds Green, Arnos Grove)" }, "notes": "Cost was contested in research and settled by tiebreaker.", "opened": "1932-09-19", "segment": { "fromStopIndex": 30, "toStopIndex": 35 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "The first phase of the extension to Arnos Grove opened on 19 September 1932, without ceremony.", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ], "stationCount": 5 }, { "confidence": "low", "geometryRef": "london-Piccadilly#2", "id": "london-piccadilly-1933-northfields", "kind": "extension", "label": { "en": "Western extension: Piccadilly trains extended to Northfields" }, "notes": "Mapped to the Heathrow-arm sub-spine: Northfields (index 7) and South Ealing (index 8), reached via Acton Town (index 9).", "opened": "1933-01-09", "segment": { "fromStopIndex": 6, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "Northfields services were introduced on 9 January 1933, and on 13 March, were extended to Hounslow West.", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, { "confidence": "low", "geometryRef": "london-Piccadilly", "id": "london-piccadilly-1933-oakwood", "kind": "extension", "label": { "en": "Cockfosters extension Stage 2 opens: Arnos Grove → Enfield West/Oakwood (Southgate, Enfield West)" }, "notes": "Enfield West was later renamed Oakwood (index 37).", "opened": "1933-03-13", "segment": { "fromStopIndex": 35, "toStopIndex": 37 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "The line was further extended to Enfield West on 13 March 1933 and finally to Cockfosters on 31 July 1933", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "london-Piccadilly#2", "id": "london-piccadilly-1933-hounslow-west", "kind": "extension", "label": { "en": "Western extension: Northfields → Hounslow West (Hounslow Barracks)" }, "notes": "Mapped to the Heathrow-arm sub-spine: Hounslow West (index 2) through Boston Manor (index 6), extending from Northfields.", "opened": "1933-03-13", "segment": { "fromStopIndex": 2, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "Northfields services were introduced on 9 January 1933, and on 13 March, were extended to Hounslow West.", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, { "confidence": "medium", "geometryRef": "london-Piccadilly", "id": "london-piccadilly-1933-cockfosters", "kind": "extension", "label": { "en": "Cockfosters extension Stage 3 opens: Enfield West/Oakwood → Cockfosters" }, "notes": "Cockfosters is the line's terminus just beyond the drawn spine (which ends at Oakwood); mapped to the Oakwood index.", "opened": "1933-07-31", "segment": { "fromStopIndex": 37, "toStopIndex": 37 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "The line was further extended to Enfield West on 13 March 1933 and finally to Cockfosters on 31 July 1933", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-09", "kind": "other", "quote": "Cockfosters opened on 31 July 1933.", "tier": "tertiary", "title": "Piccadilly line extension to Cockfosters — UK Transport Wiki", "url": "https://uktransport.fandom.com/wiki/Piccadilly_line_extension_to_Cockfosters" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Piccadilly", "id": "london-piccadilly-1933-uxbridge", "kind": "extension", "label": { "en": "Western extension: Piccadilly trains extended over District route to Uxbridge" }, "notes": "Uxbridge is the branch terminus beyond Hillingdon (off the drawn spine); mapped to the on-spine Hillingdon→Rayners Lane stretch.", "opened": "1933-10-23", "segment": { "fromStopIndex": 0, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "The extension of Piccadilly line trains to Uxbridge began on 23 October 1933", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, { "closed": "1994-09-30", "confidence": "medium", "geometryRef": null, "id": "london-piccadilly-1994-aldwych-closes", "kind": "extension", "label": { "en": "Aldwych branch closes: Holborn → Aldwych shuttle withdrawn" }, "notes": "On the Aldwych branch, off the drawn spine. Date corrected on review: 1907-11-30 was the branch opening; the shuttle was withdrawn 1994-09-30.", "opened": "1994-09-30", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "Now used for commercial filming and training", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260217083308/https://uktransport.fandom.com/wiki/Piccadilly_line", "kind": "other", "quote": "Closure Date: 30 September 1994", "tier": "tertiary", "title": "Piccadilly line — UK Transport Wiki", "url": "https://uktransport.fandom.com/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260605070450/https://en.wikipedia.org/wiki/Aldwych_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Strand (later Aldwych, opened 30 November 1907, closed 30 September 1994)", "tier": "tertiary", "title": "Aldwych tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Aldwych_tube_station", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, { "confidence": "medium", "constructionStart": "1971", "cost": { "basis": "estimate", "confidence": "low", "nominal": { "currency": "GBP", "isEstimate": true, "value": 12300000, "year": 1971 }, "notes": "Estimated £12.3 million was for the whole Heathrow extension programme (Hounslow West to Heathrow Central), not the Hatton Cross stage alone. Construction ceremony 27 April 1971; partial government funding from April 1972. [Citation chase 2026-06-11] The £12.3m figure is explicitly an estimated construction cost, sourced ultimately to Mike Horne, The Piccadilly Tube (Capital Transport, 2007, pp. 115–120), a single offline print book; the same Horne citation is reused independently by the Heathrow Terminals 2&3 station article for the same figure.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "On 19 July 1975, the line was extended to Hatton Cross.", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, "geometryRef": "london-Piccadilly#2", "id": "london-piccadilly-1975-hatton-cross", "kind": "extension", "label": { "en": "Heathrow extension Stage 1 opens: Hounslow West → Hatton Cross" }, "notes": "Hounslow West (index 2) → Hatton Cross (index 1) on the Heathrow-arm sub-spine. [Date chase 2026-06-12] Construction ceremony (\"first sod\") held 27 April 1971 per Piccadilly line Wikipedia, citing Day/Reed (2008) and Horne (2007), both offline books.", "opened": "1975-07-19", "segment": { "fromStopIndex": 1, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "On 19 July 1975, the line was extended to Hatton Cross.", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162145/https://en.wikipedia.org/wiki/Hatton_Cross_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The station opened on 19 July 1975 in the first phase of the extension of the Piccadilly line from Hounslow West to Heathrow Airport and it remained the terminus until Heathrow Central opened on 16 December 1977.", "tier": "tertiary", "title": "Hatton Cross tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hatton_Cross_tube_station", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "london-Piccadilly#2", "id": "london-piccadilly-1977-heathrow-central", "kind": "extension", "label": { "en": "Heathrow extension Stage 2 opens: Hatton Cross → Heathrow Central (Terminals 1, 2, 3)" }, "notes": "Hatton Cross (index 1) → Heathrow Central / Terminals 2 & 3 (index 0) on the Heathrow-arm sub-spine. [Opening-date chase 2026-06-13] Inaugurated by the Queen around noon on 16 December 1977; revenue services commenced at 3pm the same day.", "opened": "1977-12-16", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "The Heathrow Central extension was inaugurated by the Queen around noon on 16 December 1977", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162145/https://en.wikipedia.org/wiki/Hatton_Cross_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "it remained the terminus until Heathrow Central opened on 16 December 1977.", "tier": "tertiary", "title": "Hatton Cross tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hatton_Cross_tube_station", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" } ], "stationCount": 1 }, { "confidence": "medium", "constructionStart": "1983", "cost": { "basis": "estimate", "confidence": "low", "nominal": { "currency": "GBP", "isEstimate": true, "value": 24600000, "year": 1983 }, "notes": "Estimated £24.6 million for the 2.5-mile Terminal 4 loop. Construction began 9 February 1983; commissioned 4 November 1985; opened to the public 1 April 1986. [Citation chase 2026-06-11] A second Wikipedia article (Heathrow Terminal 4 tube station) cites the same LRT News source but gives £23 million for the same scope; the primary LRT News article is print-only and unverifiable, so the £24.6m estimate should be treated as approximate.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "The terminal and station were finally opened a few months later on 1 April 1986", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260406184725/https://en.wikipedia.org/wiki/Heathrow_Terminal_4_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "London Regional Transport funded the construction of 2.5 mi (4.0 km) of new tunnels, the track and the fit-out of the station, at a cost of £23 million.", "tier": "secondary", "title": "Heathrow Terminal 4 tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Heathrow_Terminal_4_tube_station", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, "geometryRef": "london-Piccadilly#2", "id": "london-piccadilly-1986-terminal-4", "kind": "extension", "label": { "en": "Heathrow Terminal 4 loop opens (single-track loop via Terminal 4)" }, "notes": "The Terminal 4 loop is a single-track loop off the Heathrow arm; Terminal 4 is not a separate stop in the branch index, so mapped to the nearest Heathrow node, Terminals 2 & 3 (index 0). [Date chase 2026-06-12] Construction of the Terminal 4 loop extension began 9 February 1983; corroborated by both the Piccadilly line and Heathrow Terminal 4 tube station Wikipedia articles, ultimately sourced to the offline LRT News article by Jim Cobley (28 March 1986). [Opening-date chase 2026-06-13] Ceremonial opening by the Prince and Princess of Wales 1 April 1986; trains first stopped (revenue service) on 12 April 1986 when Terminal 4 began handling flights.", "opened": "1986-04-01", "segment": { "fromStopIndex": 0, "toStopIndex": 0 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "The terminal and station were finally opened a few months later on 1 April 1986", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260406184725/https://en.wikipedia.org/wiki/Heathrow_Terminal_4_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The station was officially opened by the Prince and Princess of Wales on 1 April 1986, before opening the Terminal 4 itself shortly afterwards. Trains, however, did not stop at the station until 12 April, when the new terminal started to handle flights.", "tier": "tertiary", "title": "Heathrow Terminal 4 tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Heathrow_Terminal_4_tube_station", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162145/https://en.wikipedia.org/wiki/Hatton_Cross_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "For the new Terminal 4 at the airport, a single track loop was tunnelled from Hatton Cross to Heathrow Central (now called 'Heathrow Terminals 2 & 3') with an intermediate new Terminal 4 station, which opened on 12 April 1986.", "tier": "tertiary", "title": "Hatton Cross tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hatton_Cross_tube_station", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "london-Piccadilly#2", "id": "london-piccadilly-2008-terminal-5", "kind": "extension", "label": { "en": "Heathrow Terminal 5 extension opens (from Terminals 1, 2, 3 to Terminal 5)" }, "notes": "The Terminal 5 extension is a spur off the Heathrow arm; Terminal 5 is not a separate stop in the branch index, so mapped to the nearest Heathrow node, Terminals 2 & 3 (index 0).", "opened": "2008-03-27", "segment": { "fromStopIndex": 0, "toStopIndex": 0 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "The station and terminal were opened on 27 March 2008", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250905094609/https://tfl.gov.uk/info-for/media/press-releases/2008/march/first-piccadilly-line-passengers-travel-to-heathrow-terminal-5", "kind": "primary", "publisher": "Transport for London", "quote": "The first Tube passengers travelled to Heathrow Terminal 5 today using the newly extended Piccadilly line and new T5 station.", "tier": "primary", "title": "First Piccadilly Line Passengers Travel to Heathrow Terminal 5 — TfL Press Release", "url": "https://tfl.gov.uk/info-for/media/press-releases/2008/march/first-piccadilly-line-passengers-travel-to-heathrow-terminal-5", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, { "cityId": "london", "color": "#009FE0", "displayNumber": "Victoria", "id": "london-line-victoria", "name": { "en": "Victoria line (Brixton ↔ Walthamstow Central)" }, "phases": [ { "confidence": "medium", "constructionStart": "1962", "cost": { "basis": "budget", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": true, "value": 56000000, "year": 1962 }, "notes": "Parliamentary-approval budget of £56M (1962) for the WHOLE Walthamstow–Victoria line, not this segment alone. Secondary sources (Londonist) report the 1962 estimate as ~£55M rising to ~£70M before completion; the Brixton extension was a separately-approved additional cost. [Citation chase 2026-06-11] The £56M figure rests solely on Day & Reed (2010), an offline, independently-unverifiable book; the only accessible primary source (HMSO 1959 report) gives a £55m London Transport estimate for the same whole-line scope, so the exact £56m value is not independently corroborated. The £56M is best characterized as the 1962 parliamentary-approval budget (an authorized amount) rather than a forecast estimate.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123851/https://en.wikipedia.org/wiki/Victoria_line", "kind": "wikipedia", "quote": "After the line gained parliamentary approval on 20 August 1962 with a budget of £56 million, construction began the following month.", "tier": "tertiary", "title": "Victoria line — Wikipedia (construction & budget)", "url": "https://en.wikipedia.org/wiki/Victoria_line" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "Her Majesty's Stationery Office", "quote": "London Transport estimate that the capital cost of the Victoria Line is £55m.", "tier": "primary", "title": "The Victoria Line: Report by the London Travel Committee to the Minister of Transport and Civil Aviation (HMSO, 1959)", "url": "https://archive.org/details/op1265392-1001", "via": "https://en.wikipedia.org/wiki/Victoria_line" } ] }, "geometryRef": "london-Victoria", "id": "london-victoria-1968-stage1", "kind": "initial", "label": { "en": "Stage 1 opens: Walthamstow Central → Highbury & Islington" }, "notes": "[Date chase 2026-06-12] Wikipedia also notes 'Initial construction began in January 1960' for two experimental test tunnels; these were preliminary trial works, not the main line build, so the curated 1962 main construction start is correct. Londonist source was inaccessible (403 live, archive blocked). [Opening-date chase 2026-06-13] No opening ceremony; the line entered normal service directly (first train left Walthamstow Central at 7:32 a.m.). Pure revenue-service opening, no ceremonial-vs-public ambiguity.", "opened": "1968-09-01", "segment": { "fromStopIndex": 10, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123851/https://en.wikipedia.org/wiki/Victoria_line", "kind": "wikipedia", "quote": "The line opened from Walthamstow Central to Highbury & Islington on 1 September 1968.", "tier": "tertiary", "title": "Victoria line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Victoria_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20250910023640/https://londonist.com/london/transport/a-brief-history-of-the-victoria-line", "kind": "news", "quote": "the cost of the line in 1962 was estimated to be £55M ... but rose to £70M before completion", "tier": "secondary", "title": "A Brief History Of The Victoria Line — Londonist", "url": "https://londonist.com/london/transport/a-brief-history-of-the-victoria-line" } ], "stationCount": 6 }, { "confidence": "low", "geometryRef": "london-Victoria", "id": "london-victoria-1968-stage2", "kind": "extension", "label": { "en": "Stage 2 opens: Highbury & Islington → Warren Street (King's Cross St Pancras, Euston, Warren Street)" }, "notes": "[Opening-date chase 2026-06-13] Plain public-service opening with no ceremony; no ceremonial-vs-revenue date split.", "opened": "1968-12-01", "segment": { "fromStopIndex": 7, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123851/https://en.wikipedia.org/wiki/Victoria_line", "kind": "wikipedia", "quote": "The next section to Warren Street, opened on 1 December 1968, again without ceremony.", "tier": "tertiary", "title": "Victoria line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Victoria_line" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": "london-Victoria", "id": "london-victoria-1969-stage3", "kind": "extension", "label": { "en": "Stage 3 opens: Warren Street → Victoria (Oxford Circus, Green Park, Victoria) — formally opened by Queen Elizabeth II" }, "notes": "[Opening-date chase 2026-06-13] Formally opened by Queen Elizabeth II at 11:00 a.m.; open to the general public the same afternoon (by 3:00 p.m.) — ceremonial and revenue-service dates coincide.", "opened": "1969-03-07", "segment": { "fromStopIndex": 4, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123851/https://en.wikipedia.org/wiki/Victoria_line", "kind": "wikipedia", "quote": "The line was formally opened by Queen Elizabeth II on 7 March 1969 when it had been completed to Victoria.", "tier": "tertiary", "title": "Victoria line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Victoria_line" } ], "stationCount": 3 }, { "confidence": "low", "cost": { "basis": "estimate", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": true, "value": 15000000, "year": 1966 }, "notes": "Approx £15M additional cost for the Victoria–Brixton extension (approved March 1966) per secondary reporting. Pimlico station on this section was deferred and opened separately in 1972, so this phase added Vauxhall, Stockwell and Brixton. [Citation chase 2026-06-11] A contemporaneous primary source (Hansard, Commons, 2 April 1968) corroborates the extension cost, stating the Brixton extension \"is expected to cost about £16 million\" mid-construction — consistent with the £15M March 1966 approval estimate, the ~£1M difference reflecting estimate growth over time.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20250910023640/https://londonist.com/london/transport/a-brief-history-of-the-victoria-line", "kind": "news", "quote": "plans to expand the Victoria line to Brixton were approved the following month, at an additional cost of £15 million", "tier": "secondary", "title": "A Brief History Of The Victoria Line — Londonist", "url": "https://londonist.com/london/transport/a-brief-history-of-the-victoria-line" } ] }, "geometryRef": "london-Victoria", "id": "london-victoria-1971-stage4", "kind": "extension", "label": { "en": "Stage 4 opens: Victoria → Brixton (Vauxhall, Stockwell, Brixton) — opened by Princess Alexandra" }, "notes": "Pimlico (index 3) within this span was deferred and opened separately in 1972 (next phase). Cost was contested in research and settled by tiebreaker. [Opening-date chase 2026-06-13] Opened by Princess Alexandra (Brixton-to-Vauxhall journey); sources record no separate later public-service date, so 23 July 1971 is both the ceremonial and the public opening. Pimlico station was passed through without stopping at this stage (not yet complete).", "opened": "1971-07-23", "segment": { "fromStopIndex": 0, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123851/https://en.wikipedia.org/wiki/Victoria_line", "kind": "wikipedia", "quote": "It was opened on 23 July 1971 by Princess Alexandra, The Honourable Lady Ogilvy, who made a journey from Brixton to Vauxhall.", "tier": "tertiary", "title": "Victoria line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Victoria_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123851/https://en.wikipedia.org/wiki/Victoria_line", "kind": "wikipedia", "quote": "The 3.5-mile (5.6 km) extension from Victoria to Brixton with stations at Vauxhall and Stockwell was approved in March 1966.", "tier": "tertiary", "title": "Victoria line — Wikipedia (Brixton extension approval)", "url": "https://en.wikipedia.org/wiki/Victoria_line" } ], "stationCount": 3 }, { "confidence": "low", "cost": { "basis": "estimate", "confidence": "high", "nominal": { "currency": "GBP", "isEstimate": true, "value": 1400000, "year": 1968 }, "notes": "Total estimated cost of building Pimlico station alone; approved June 1968, opened 14 September 1972. Only Victoria line station with no interchange. [Citation chase 2026-06-11] The £1.4m figure is the pre-construction estimate from Minister of Transport Richard Marsh's approval, confirmed by a Hansard written answer (28 June 1968) and London Transport Magazine (July 1968), both stating the cost was \"estimated at £1.4 million.\"", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251216001328/https://en.wikipedia.org/wiki/Pimlico_tube_station", "kind": "wikipedia", "quote": "The station was opened by the Lord Mayor of Westminster on 14 September 1972 ... The total estimated cost was £1.4 million.", "tier": "tertiary", "title": "Pimlico tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Pimlico_tube_station" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20250826062117/https://api.parliament.uk/historic-hansard/written-answers/1968/jun/28/victoria-line-extension-pimlico-station", "kind": "primary", "publisher": "UK Parliament (Hansard)", "quote": "I have today approved a proposal by the London Transport Board to build a station at Pimlico on the Brixton extension of the Victoria Line. The cost is estimated at £1.4 million.", "tier": "primary", "title": "Victoria Line Extension (Pimlico Station)", "url": "https://api.parliament.uk/historic-hansard/written-answers/1968/jun/28/victoria-line-extension-pimlico-station", "via": "https://en.wikipedia.org/wiki/Pimlico_tube_station" } ] }, "geometryRef": "london-Victoria", "id": "london-victoria-1972-pimlico", "kind": "extension", "label": { "en": "Pimlico station opens (infill station on the Victoria–Brixton section)" }, "notes": "[Opening-date chase 2026-06-13] Opened by the Lord Mayor of Westminster and began serving regular passengers the same afternoon — ceremony and revenue service on the same date. Infill station completed more than a year after the rest of the line became fully operational.", "opened": "1972-09-14", "segment": { "fromStopIndex": 3, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123851/https://en.wikipedia.org/wiki/Victoria_line", "kind": "wikipedia", "quote": "The final piece of the Victoria line, Pimlico station, opened on 14 September 1972.", "tier": "tertiary", "title": "Victoria line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Victoria_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251216001328/https://en.wikipedia.org/wiki/Pimlico_tube_station", "kind": "wikipedia", "quote": "The station was opened by the Lord Mayor of Westminster on 14 September 1972 ... The total estimated cost was £1.4 million.", "tier": "tertiary", "title": "Pimlico tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Pimlico_tube_station" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123851/https://en.wikipedia.org/wiki/Victoria_line", "kind": "wikipedia", "tier": "tertiary", "title": "Victoria line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Victoria_line" } ] }, { "cityId": "london", "color": "#66CCCC", "displayNumber": "Waterloo & City", "id": "london-line-waterloo-city", "name": { "en": "Waterloo & City line (Waterloo ↔ Bank)" }, "phases": [ { "confidence": "medium", "constructionStart": "1894", "cost": { "basis": "budget", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": false, "value": 229064, "year": 1894 }, "notes": "Construction contract sum awarded to John Mowlem & Co for building the railway (contract ~1894). Wikipedia gives an inflation equivalent of £25,740,000 in 2025. The 1891 enabling bill separately authorised capital of £500,000 (an authorisation figure, not the build cost). The small absolute value is correct — it is the contract sum, not a millions shorthand. [Citation chase 2026-06-11] The £229,064 figure traces to a single offline specialist monograph (J.C. Gillham, \"The Waterloo & City Railway\", Oakwood Press, 2001) via Wikipedia; it is the build-contract sum (a contracted/authorized amount), not a verified actual final outturn.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515215719/https://en.wikipedia.org/wiki/Waterloo_%26_City_line", "kind": "wikipedia", "quote": "a contract was awarded to John Mowlem & Co for the sum of £229,064", "tier": "tertiary", "title": "Waterloo & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Waterloo_%26_City_line" } ] }, "geometryRef": "london-Waterloo & City", "id": "london-waterloo-city-1898-initial", "kind": "initial", "label": { "en": "Line opens: Waterloo → Bank (Waterloo & City Railway, \"The Drain\")" }, "notes": "[Date chase 2026-06-12] Construction-start date (18 June 1894, Mowlem began work) is supported only by the already-curated Wikipedia source; surrounding wikitext cites offline print sources (Gillham 2001; The Engineer, 26 July 1895). The TfL Research Guide No. 29 PDF primary source is a dead link (HTTP 404) and its web.archive.org copy was inaccessible from this environment, so it could not be independently verified. [Opening-date chase 2026-06-13] The 11 July 1898 TfL Research Guide date is the ceremonial/VIP opening by Prince George, Duke of Cambridge; the curated 8 August 1898 correctly records the public/revenue-service opening (~4 weeks later).", "opened": "1898-08-08", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515215719/https://en.wikipedia.org/wiki/Waterloo_%26_City_line", "kind": "wikipedia", "quote": "The Waterloo and City Railway opened to the public at 8 a.m. on Monday 8 August 1898, with a train leaving each terminal simultaneously.", "tier": "tertiary", "title": "Waterloo & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Waterloo_%26_City_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515215719/https://en.wikipedia.org/wiki/Waterloo_%26_City_line", "kind": "wikipedia", "quote": "Mowlem began work on 18 June 1894, first building staging in the river about 500 feet (150 m) west of Blackfriars Bridge.", "tier": "tertiary", "title": "Waterloo & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Waterloo_%26_City_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251126135124/https://content.tfl.gov.uk/research-guide-no-29-brief-history-of-the-waterloo-and-city-line.pdf", "kind": "primary", "quote": "The Waterloo and City railway opened on 11 July 1898 by Prince George, the Duke of Cambridge.", "tier": "primary", "title": "A Brief History of the Waterloo & City Line — TfL Research Guide No. 29", "url": "https://content.tfl.gov.uk/research-guide-no-29-brief-history-of-the-waterloo-and-city-line.pdf" } ], "stationCount": 2 }, { "closed": "2020-03-01", "confidence": "medium", "geometryRef": "london-Waterloo & City", "id": "london-waterloo-city-2021-covid-reopening", "kind": "reopening", "label": { "en": "COVID-19 closure and reopening: line suspended (Mar 2020), reopens Waterloo ↔ Bank" }, "notes": "Suspended March 2020 due to the COVID-19 pandemic; exact closure day approximated to 2020-03-01. Reopened 4 June 2021. [Opening-date chase 2026-06-13] Day discrepancy: TfL primary press release says reopening was 'Monday 07 June' 2021 and BBC is dated 7 June; Wikipedia's '4 June 2021' (4 June was a Friday) appears to be a Wikipedia error. Likely correct day is 2021-06-07.", "opened": "2021-06-04", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515215719/https://en.wikipedia.org/wiki/Waterloo_%26_City_line", "kind": "wikipedia", "quote": "The line reopened ahead of schedule on 4 June 2021, initially operating a peak hour only service on weekday mornings and evenings", "tier": "tertiary", "title": "Waterloo & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Waterloo_%26_City_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251118112123/https://tfl.gov.uk/info-for/media/press-releases/2021/june/waterloo-and-city-line-to-re-open-ahead-of-schedule", "kind": "primary", "quote": "Waterloo & City line to re-open ahead of schedule", "tier": "primary", "title": "Waterloo & City line to re-open ahead of schedule — Transport for London (press release)", "url": "https://tfl.gov.uk/info-for/media/press-releases/2021/june/waterloo-and-city-line-to-re-open-ahead-of-schedule" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515215719/https://en.wikipedia.org/wiki/Waterloo_%26_City_line", "kind": "wikipedia", "tier": "tertiary", "title": "Waterloo & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Waterloo_%26_City_line" } ] }, { "cityId": "london", "color": "#6950A1", "displayNumber": "Elizabeth", "id": "london-line-elizabeth", "name": { "en": "Elizabeth line (Reading/Heathrow ↔ Shenfield/Abbey Wood)" }, "phases": [ { "confidence": "low", "geometryRef": null, "id": "london-elizabeth-2015-shenfield-takeover", "kind": "initial", "label": { "en": "TfL Rail takeover: Liverpool Street (main line) → Shenfield (existing eastern branch transferred from Abellio Greater Anglia)" }, "notes": "Not new construction — TfL took over the existing Shenfield metro service under the interim 'TfL Rail' brand. The Elizabeth line has no drawn geometry, so all phases are non-drawable.", "opened": "2015-05-31", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "quote": "Existing 'metro' service between Liverpool Street (main line station) and Shenfield transferred from Abellio Greater Anglia to TfL Rail", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" } ] }, { "confidence": "low", "geometryRef": null, "id": "london-elizabeth-2017-class-345-east", "kind": "extension", "label": { "en": "Class 345 trains introduced: Liverpool Street → Shenfield (reduced-length, TfL Rail)" }, "notes": "Rolling-stock/service milestone on the existing eastern branch, not new construction. No drawn geometry.", "opened": "2017-06-22", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "quote": "Class 345 trains began operating between Liverpool Street and Shenfield on 22 June 2017 in reduced-length format.", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" } ] }, { "confidence": "low", "geometryRef": null, "id": "london-elizabeth-2018-heathrow-takeover", "kind": "extension", "label": { "en": "TfL Rail takeover: Paddington (main line) → Heathrow Terminal 4 (transferred from Heathrow Connect)" }, "notes": "Service takeover of the existing Heathrow Connect route under the TfL Rail brand, not new construction. No drawn geometry.", "opened": "2018-05-20", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "quote": "Existing service between Paddington (main line station) and Heathrow Terminal 4 transferred from Heathrow Connect", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" } ] }, { "confidence": "low", "geometryRef": null, "id": "london-elizabeth-2019-reading-takeover", "kind": "extension", "label": { "en": "TfL Rail takeover: Paddington → Reading (most stopping services transferred from Great Western Railway)" }, "notes": "Service takeover of existing GWR stopping services on the western branch, not new construction. No drawn geometry. [Opening-date chase 2026-06-13] A soft/trial launch ran the first TfL trains to Reading on 25 November 2019; the full official transfer was 15 December 2019 (the curated date).", "opened": "2019-12-15", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "quote": "Most stopping services between Paddington and Reading transferred from Great Western Railway to TfL Rail", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" } ] }, { "confidence": "low", "geometryRef": null, "id": "london-elizabeth-2020-class-345-west", "kind": "extension", "label": { "en": "Class 345 trains introduced: Paddington → Heathrow (TfL Rail western branch)" }, "notes": "Rolling-stock milestone on the existing western branch, not new construction. No drawn geometry.", "opened": "2020-07-30", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "quote": "Class 345 trains began running between Paddington and Heathrow on 30 July 2020.", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" } ] }, { "confidence": "medium", "constructionStart": "2009", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": false, "value": 18900000000, "year": 2022 }, "notes": "Final outturn cost of the ENTIRE Crossrail central-section project (new tunnels + 10 new stations + systems), not this opening day alone. Original 2008/2010 budget was £14.8bn–£15.9bn; final cost £18.9bn (£18.8bn cited by some sources). Construction works began 15 May 2009 (piling at Canary Wharf). [Citation chase 2026-06-11] Accessible primary sources (Crossrail Ltd \"Funding\" page, May 2022 snapshot; Reuters, 24 May 2022) describe the figure as an agreed £18.8bn funding envelope; £18.9bn rests only on the inaccessible parliament written answer HL242. The \"£13.8 billion original estimate\" in the cited quote is not corroborated by any Wikipedia version (which uses £14.8bn/£15.9bn). [TCP cross-validation 2026-06-13] Basis corrected budget→outturn: £18.9bn is the delivered whole-programme cost (NAO), not the budget (£14.8bn funding envelope, 2010). The figure spans the whole Crossrail programme (central tunnels + Network Rail surface upgrades + systems), which is broader than the Transit Costs Project boundary of £13.3bn (2015, central tunnelled section only) — the ~42% gap is scope+year+basis, not a value error.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515170712/https://en.wikipedia.org/wiki/Crossrail", "kind": "wikipedia", "quote": "construction cost £18.9 billion, well above the original estimate of £13.8 billion", "tier": "tertiary", "title": "Crossrail — Wikipedia", "url": "https://en.wikipedia.org/wiki/Crossrail" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "Crossrail Ltd", "quote": "The total funding envelope is now £18.8 billion. Both the Department for Transport (DfT) and Transport for London (TfL) remain committed to the successful delivery of the project and have agreed an overall funding envelope of £18.8 billion for delivery of the project.", "tier": "secondary", "title": "Funding — Crossrail Ltd", "url": "https://web.archive.org/web/20220520012858/https://www.crossrail.co.uk/about-us/funding", "via": "https://en.wikipedia.org/wiki/Crossrail" } ] }, "geometryRef": null, "id": "london-elizabeth-2022-central-section", "kind": "initial", "label": { "en": "Central section opens: Paddington (low level) → Abbey Wood (new twin tunnels and central stations; Elizabeth line branding begins)" }, "notes": "The only genuinely new construction on the line: 26 km of new twin-bore tunnels and 9 new central stations, opened initially as a self-contained Paddington–Abbey Wood shuttle. The Elizabeth line has no drawn geometry. [Date chase 2026-06-12] Construction start 15 May 2009 (piling at future Canary Wharf station); ceremony attended by PM Gordon Brown and Mayor Boris Johnson. Underlying primary source is a Contract Journal article (Neil Gerrard, 15 May 2009); its original URL is dead and the web.archive.org copy was inaccessible in this environment. [Opening-date chase 2026-06-13] Queen Elizabeth II ceremonially opened the line on 17 May 2022; the curated 24 May 2022 is the public revenue-service date. Bond Street was excluded at this opening and initial Sunday services were suspended for further testing.", "opened": "2022-05-24", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "quote": "Services between Paddington and Abbey Wood begin", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515170712/https://en.wikipedia.org/wiki/Crossrail", "kind": "wikipedia", "quote": "Work began on 15 May 2009 when piling works started at the future Canary Wharf station.", "tier": "tertiary", "title": "Crossrail — Wikipedia", "url": "https://en.wikipedia.org/wiki/Crossrail" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20160117062040/http://www.contractjournal.com/Articles/2009/05/15/67882/work-officially-starts-on-crossrail-photos.html", "kind": "news", "publisher": "Contract Journal", "quote": "Work officially starts on Crossrail [headline; dated 15 May 2009]", "tier": "secondary", "title": "Work officially starts on Crossrail", "url": "http://www.contractjournal.com/Articles/2009/05/15/67882/work-officially-starts-on-crossrail-photos.html", "via": "https://en.wikipedia.org/wiki/Elizabeth_line" } ], "stationCount": 9 }, { "confidence": "low", "geometryRef": null, "id": "london-elizabeth-2022-bond-street", "kind": "extension", "label": { "en": "Bond Street station opens (delayed central-section station)" }, "notes": "Bond Street was the 10th new central station; it opened ~5 months after the rest of the central section. No drawn geometry.", "opened": "2022-10-24", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515170712/https://en.wikipedia.org/wiki/Crossrail", "kind": "wikipedia", "quote": "Bond Street opened on 24 October 2022", "tier": "tertiary", "title": "Crossrail — Wikipedia", "url": "https://en.wikipedia.org/wiki/Crossrail" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": null, "id": "london-elizabeth-2022-through-running", "kind": "extension", "label": { "en": "Through-running begins: Reading/Heathrow → Abbey Wood and Shenfield → Paddington (branches joined to central tunnel)" }, "notes": "No new stations; the previously separate eastern/western branches were connected through the new central tunnel. No drawn geometry.", "opened": "2022-11-06", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "quote": "Services begin between Paddington and Shenfield; and between Reading and Abbey Wood; and between Heathrow and Abbey Wood", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515170712/https://en.wikipedia.org/wiki/Crossrail", "kind": "wikipedia", "quote": "From Sunday 6 November trains began running directly from Reading and Heathrow in the west to Abbey Wood", "tier": "tertiary", "title": "Crossrail — Wikipedia", "url": "https://en.wikipedia.org/wiki/Crossrail" } ] }, { "confidence": "low", "geometryRef": null, "id": "london-elizabeth-2023-full-timetable", "kind": "extension", "label": { "en": "Full timetable / complete through service: Heathrow & Reading → Abbey Wood and Shenfield" }, "notes": "Final stage delivering the complete integrated timetable with full through-running. No new stations and no drawn geometry. [Opening-date chase 2026-06-13] Best-evidenced date is 22 May 2023 (Monday) per the primary TfL press release announcing the full peak timetable; the curated 2023-05-21 is one day early. Same-year, day-level variance only.", "opened": "2023-05-21", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "quote": "Full route opens, with services between Heathrow and both Abbey Wood and Shenfield", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515170712/https://en.wikipedia.org/wiki/Crossrail", "kind": "wikipedia", "tier": "tertiary", "title": "Crossrail — Wikipedia", "url": "https://en.wikipedia.org/wiki/Crossrail" } ] }, { "cityId": "london", "color": "#00B2A9", "displayNumber": "DLR", "id": "london-line-DLR", "name": { "en": "Docklands Light Railway (DLR)" }, "phases": [ { "confidence": "high", "constructionStart": "1985", "cost": { "basis": "budget", "confidence": "high", "nominal": { "currency": "GBP", "isEstimate": true, "value": 77000000, "year": 1984 }, "notes": "£77M was the government funding/budget cap the joint venture had to build the whole initial system within — a budget, not a final outturn. Covers the entire 1987 network (both this phase and the Tower Gateway stub phase); recorded once here to avoid double-counting.", "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "Construction of the system began shortly after in 1985, with the joint venture careful to minimise costs in light of the £77 million budget.", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (£77M budget)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" } ] }, "geometryRef": "london-DLR", "id": "london-dlr-1987-initial", "kind": "initial", "label": { "en": "Initial system: Tower Gateway/Stratford → Island Gardens (Isle of Dogs & Stratford branch)" }, "notes": "Original DLR network opened to passengers 31 Aug 1987 (Queen Elizabeth II ceremonial opening 30 Jul 1987 — revenue service is the later date). This phase draws the Isle of Dogs spine (Island Gardens↔Poplar) and the Stratford branch (Poplar↔Stratford); the Tower Gateway stub of the same 1987 opening is a separate drawable phase (shared cost recorded here). Langdon Park (2007 infill) sits on this 1987 track — its dot may read early. The £77M figure is the whole initial-system budget.", "opened": "1987-08-31", "segment": { "fromStopIndex": 5, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "The railway was formally opened by Queen Elizabeth II on 30 July 1987, and passenger services began on 31 August.", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (opened 31 Aug 1987)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" }, { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "The initial system comprised two routes, from Tower Gateway and Stratford to Island Gardens ... serving 15 stations.", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (initial 15-station network)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" } ], "stationCount": 15 }, { "confidence": "high", "constructionStart": "1985", "geometryRef": "london-DLR#2", "id": "london-dlr-1987-tower-gateway", "kind": "initial", "label": { "en": "Initial system: Tower Gateway stub (Tower Gateway → Poplar)" }, "notes": "The Tower Gateway ↔ Poplar arm of the same 1987 initial opening, drawn on the Tower Gateway spine (its Shadwell/Limehouse/Westferry stations are counted in the 15-station initial total on the sibling phase). No separate cost — the whole 1987 system cost is recorded on the Isle-of-Dogs/Stratford phase to avoid double-counting.", "opened": "1987-08-31", "segment": { "fromStopIndex": 11, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "The initial system comprised two routes, from Tower Gateway and Stratford to Island Gardens ... serving 15 stations.", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (initial network incl. Tower Gateway)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" } ], "stationCount": 0 }, { "confidence": "high", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": true, "value": 295000000, "year": 1991 }, "notes": "Sources conflict: DLR Wikipedia gives £295M for the Bank tunnel extension, while other sources cite ~£149M that appears to cover only the tunnel civils rather than the full works. Recorded as the £295M full-works figure but flagged isEstimate given the disagreement; see research.dlr.json.", "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "the system was expanded into the heart of the City of London to Bank through a tunnel, which opened in 1991 at a cost of £295 million.", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (Bank tunnel £295M)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" } ] }, "geometryRef": "london-DLR#4", "id": "london-dlr-1991-bank", "kind": "extension", "label": { "en": "Bank extension: Tower Gateway area → Bank (City tunnel)" }, "notes": "Tunnel into the City of London to a new underground Bank station, opened 29 Jul 1991. Drawn as the Shadwell→Bank tunnel branch.", "opened": "1991-07-29", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "29 July 1991 — The DLR opened at Bank station on this date.", "tier": "tertiary", "title": "Bank and Monument stations — Wikipedia (DLR opened 29 Jul 1991)", "url": "https://en.wikipedia.org/wiki/Bank_and_Monument_stations" }, { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "the system was expanded into the heart of the City of London to Bank through a tunnel, which opened in 1991 at a cost of £295 million.", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (Bank tunnel)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" } ], "stationCount": 1 }, { "confidence": "high", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "GBP", "isEstimate": false, "value": 280000000, "year": 1994 }, "notes": "£280M for the Poplar→Beckton branch (11 stations), opened March 1994 (Wikipedia). A lower ~£224M figure appears on some enthusiast sources (railuk); £280M is the better-sourced figure and is used here, with the alternative noted for transparency.", "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "A route from Poplar via Canning Town and the north side of the Royal Docks complex was chosen, and opened in March 1994 at a cost of £280 million.", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (Beckton £280M)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" } ] }, "geometryRef": "london-DLR#2", "id": "london-dlr-1994-beckton", "kind": "extension", "label": { "en": "Beckton extension: Poplar → Beckton" }, "notes": "New branch from Poplar via Canning Town and the north side of the Royal Docks to Beckton, opened 28 Mar 1994.", "opened": "1994-03-28", "segment": { "fromStopIndex": 0, "toStopIndex": 11 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "The DLR branch from Poplar was opened on 28 March 1994.", "tier": "tertiary", "title": "Beckton DLR station — Wikipedia (branch opened 28 Mar 1994)", "url": "https://en.wikipedia.org/wiki/Beckton_DLR_station" }, { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "A route from Poplar via Canning Town and the north side of the Royal Docks complex was chosen, and opened in March 1994 at a cost of £280 million.", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (Beckton branch)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" } ], "stationCount": 11 }, { "confidence": "high", "constructionStart": "1996", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "GBP", "isEstimate": false, "value": 200000000, "year": 1999 }, "notes": "£200M PFI total (government contributed ~£50M); opened ahead of schedule and within budget. Resolves a source spread of £140M (initial estimate)/£200M/£220M to the £200M final figure.", "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "Construction began in 1996, with the extension opening ahead of schedule on 20 November 1999 ... with Government contributing around £50 million of the £200 million", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (Lewisham £200M, 1996–1999)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" }, { "accessedAt": "2026-07-14", "kind": "primary", "publisher": "Transport for London", "quote": "The £200m line ... opened two months ahead of schedule and within its budget.", "tier": "primary", "title": "DLR toasts 10 years of the Lewisham extension — TfL", "url": "https://tfl.gov.uk/info-for/media/press-releases/2009/november/dlr-toasts-10-years-of-the-lewisham-extension" } ] }, "geometryRef": "london-DLR", "id": "london-dlr-1999-lewisham", "kind": "extension", "label": { "en": "Lewisham extension: Island Gardens → Lewisham (Thames tunnel)" }, "notes": "Tunnel under the Thames from Island Gardens to Greenwich and on to Lewisham, opened 20 Nov 1999, two months ahead of schedule. Delivered as a PFI by consortium CGL Rail.", "opened": "1999-11-20", "segment": { "fromStopIndex": 0, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "the extension opening ahead of schedule on 20 November 1999", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (Lewisham opened 20 Nov 1999)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" } ], "stationCount": 5 }, { "confidence": "high", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "GBP", "isEstimate": false, "value": 142000000, "year": 2005 }, "notes": "£142M, built under a PFI concession (City Airport Rail Enterprises); four stations added.", "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "The extension initially opened as far as King George V in North Woolwich on 2nd December 2005.", "tier": "tertiary", "title": "London City Airport DLR station — Wikipedia (£142M PFI)", "url": "https://en.wikipedia.org/wiki/London_City_Airport_DLR_station" } ] }, "geometryRef": "london-DLR#3", "id": "london-dlr-2005-city-airport", "kind": "extension", "label": { "en": "London City Airport extension: Canning Town → King George V" }, "notes": "4.4 km branch from Canning Town serving London City Airport, opened as far as King George V on 2 Dec 2005. Built under a 30-year PFI concession.", "opened": "2005-12-02", "segment": { "fromStopIndex": 0, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "The extension initially opened as far as King George V in North Woolwich on 2nd December 2005.", "tier": "tertiary", "title": "London City Airport DLR station — Wikipedia (opened 2 Dec 2005)", "url": "https://en.wikipedia.org/wiki/London_City_Airport_DLR_station" }, { "accessedAt": "2026-07-14", "kind": "news", "publisher": "Railway Gazette International", "quote": "Services on the 4·4 km branch from Canning Town to King George V had already begun on December 2, adding four stations to the DLR network.", "tier": "secondary", "title": "DLR reaches City Airport — Railway Gazette International", "url": "https://www.railwaygazette.com/dlr-reaches-city-airport/25491.article" } ], "stationCount": 4 }, { "confidence": "high", "constructionStart": "2005", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "GBP", "isEstimate": false, "value": 180000000, "year": 2009 }, "notes": "£180M extension; delivered ahead of schedule and within budget.", "sources": [ { "accessedAt": "2026-07-14", "kind": "primary", "publisher": "Transport for London", "quote": "The Mayor of London, Boris Johnson, officially opened a £180m extension of the Docklands Light Railway (DLR) to Woolwich Arsenal.", "tier": "primary", "title": "Mayor unveils DLR Woolwich Arsenal station — TfL", "url": "https://tfl.gov.uk/info-for/media/press-releases/2009/january/mayor-unveils-dlr-woolwich-arsenal-station" } ] }, "geometryRef": "london-DLR#3", "id": "london-dlr-2009-woolwich", "kind": "extension", "label": { "en": "Woolwich Arsenal extension: King George V → Woolwich Arsenal (Thames tunnel)" }, "notes": "Tunnel under the Thames from King George V to a new Woolwich Arsenal station, public service 10 Jan 2009 (Mayoral ceremony 12 Jan). Physical works began June 2005; Thames tunnel completed 23 Jul 2007. NOTE: OSM does not include a Woolwich Arsenal DLR stop node, so this phase uses a coordinate-form segment to the spine terminus — the track draws but the Woolwich Arsenal dot is absent.", "opened": "2009-01-10", "segment": { "from": [ 0.06179, 51.50197 ], "to": [ 0.07, 51.48987 ] }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "The extension opened on 10 January 2009 ... Construction began in June 2005 ... The tunnels under the Thames were completed on 23 July 2007.", "tier": "tertiary", "title": "Woolwich Arsenal station — Wikipedia (opened 10 Jan 2009)", "url": "https://en.wikipedia.org/wiki/Woolwich_Arsenal_station" }, { "accessedAt": "2026-07-14", "kind": "primary", "publisher": "Transport for London", "quote": "officially opened a £180m extension of the Docklands Light Railway (DLR) to Woolwich Arsenal.", "tier": "primary", "title": "Mayor unveils DLR Woolwich Arsenal station — TfL", "url": "https://tfl.gov.uk/info-for/media/press-releases/2009/january/mayor-unveils-dlr-woolwich-arsenal-station" } ], "stationCount": 1 }, { "confidence": "high", "constructionStart": "2007", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "GBP", "isEstimate": false, "value": 211000000, "year": 2011 }, "notes": "£211M extension from Canning Town to Stratford International.", "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "The £211 million extension ran from Canning Town to Stratford International ... the line opened on 31 August 2011.", "tier": "tertiary", "title": "Stratford International station — Wikipedia (£211M, opened 31 Aug 2011)", "url": "https://en.wikipedia.org/wiki/Stratford_International_station" } ] }, "geometryRef": "london-DLR#3", "id": "london-dlr-2011-stratford-international", "kind": "extension", "label": { "en": "Stratford International extension: Canning Town → Stratford International" }, "notes": "Extension from Canning Town largely reusing the former North London Line alignment to Stratford International, opened 31 Aug 2011. Adds Star Lane, West Ham, Abbey Road, Stratford High Street and Stratford International (the existing Stratford DLR platforms are on the drawn segment but pre-date this phase).", "opened": "2011-08-31", "segment": { "fromStopIndex": 4, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "the line opened on 31 August 2011.", "tier": "tertiary", "title": "Stratford International station — Wikipedia (opened 31 Aug 2011)", "url": "https://en.wikipedia.org/wiki/Stratford_International_station" } ], "stationCount": 5 } ], "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" }, { "accessedAt": "2026-07-14", "kind": "primary", "publisher": "Transport for London", "tier": "primary", "title": "Docklands Light Railway — Transport for London", "url": "https://tfl.gov.uk/modes/dlr/" } ] } ], "name": { "en": "London" } }