<Li> Jump up ^ The name dates from 1937 . </Li> <Li> Jump up ^ Until 1994 the Waterloo & City line was operated by British Rail and its predecessors . </Li> <P> The Underground uses a number of railways and alignments that were built by main - line railway companies . </P> <Ul> <Li> Bakerloo line: Between Queen's Park and Harrow & Wealdstone this runs over the Watford DC Line alongside the London & North Western Railway (LNWR) main line that opened in 1837 . The route was laid out by the LNWR in 1912--15 and is part of the Network Rail system . </Li> <Li> Central line: The railway from just south of Leyton to just south of Loughton was built by Eastern Counties Railway in 1856 on the same alignment in use today . The Underground also uses the line built in 1865 by the Great Eastern Railway (GER) between Loughton to Ongar via Epping . The connection to the main line south of Leyton was closed in 1970 and removed in 1972 . The line from Epping to Ongar was closed in 1994; most of the line is in use today by the heritage Epping Ongar Railway . The line between Newbury Park and Woodford junction (west of Roding Valley) via Hainault was built by the GER in 1903, the connections to the main line south of Newbury Park closing in 1947 (in the Ilford direction) and 1956 (in the Seven Kings direction). </Li> <Li> Central line: The line from just north of White City to Ealing Broadway was built in 1917 by the Great Western Railway (GWR) and passenger service introduced by the Underground in 1920 . North Acton to West Ruislip was built by GWR on behalf of the Underground in 1947--8 alongside the pre-existing tracks from Old Oak Common junction towards High Wycombe and beyond, which date from 1904 . As of May 2013, the original Old Oak Common junction to South Ruislip route has one main - line train a day to / from Paddington . </Li> <Li> District line: South of Kensington Olympia short sections of the 1862 West London Railway (WLR) and its 1863 West London Extension Railway (WLER) were used when District extended from Earl's Court in 1872 . The District had its own bay platform at Olympia built in 1958 along with track on the bed of the 1862 / 3 WLR / WLER northbound . The southbound WLR / WLER became the new northbound main line at that time, and a new southbound main - line track was built through the site of former goods yard . The 1872 junction closed in 1958, and a further connection to the WLR just south of Olympia closed in 1992 . The branch is now segregated . </Li> <Li> District line: The line between Campbell Road junction (now closed), near Bromley - by - Bow, and Barking was built by the London, Tilbury & Southend Railway (LTSR) in 1858 . The slow tracks were built 1903--05, when District services were extended from Bow Road (though there were no District services east of East Ham from 1905 to 1932). The slow tracks were shared with LTSR stopping and goods trains until segregated by 1962, when main - line trains stopped serving intermediate stations . </Li> <Li> District line: The railway from Barking to Upminster was built by LTSR in 1885 and the District extended over the route in 1902 . District withdrew between 1905 and 1932, when the route was quadrupled . Main - line trains ceased serving intermediate stations in 1962, and the District line today only uses the 1932 slow tracks . </Li> <Li> District line: The westbound track between east of Ravenscourt Park and Turnham Green and Turnham Green to Gunnersbury follows the alignment of a railway built by the London & South Western Railway (LSWR) in 1869 . The eastbound track between Turnham Green and east of Ravenscourt Park follows the alignment built in 1911; this was closed 1916 but was re-used when the Piccadilly line was extended in 1932 . </Li> <Li> District line: The line between East Putney and Wimbledon was built by the LSWR in 1889 . The last scheduled main - line service ran in 1941 but it still sees a few through Waterloo passenger services at the start and end of the daily timetable . The route is also used for scheduled ECS movements to / from Wimbledon Park depot and for Waterloo services diverted during disruptions and track closures elsewhere . </Li> <Li> Hammersmith & City: Between Paddington and Westbourne Park Underground station, the line runs alongside the main line . The Great Western main line opened in 1838, serving a temporary terminus the other side of Bishop's Road . When the current Paddington station opened in 1854, the line passed to the south of the old station . On opening in 1864, the Hammersmith & City Railway (then part of the Metropolitan Railway) ran via the main line to a junction at Westbourne Park, until 1867 when two tracks opened to the south of the main line, with a crossing near Westbourne Bridge, Paddington . The current two tracks to the north of the main line and the subway east of Westbourne Park opened in 1878 . The Hammersmith & City route is now completely segregated from the main line . </Li> <Li> Jubilee line: The rail route between Canning Town and Stratford was built by the GER in 1846, with passenger services starting in 1847 . The original alignment was quadrupled "in stages between 1860 and 1892" for freight services before the extra (western) tracks were lifted as traffic declined during the 20th century, and were re-laid for Jubilee line services that started in 1999 . The current Docklands Light Railway (ex-North London Line) uses the original eastern alignment and the Jubilee uses the western alignment . </Li> <Li> Northern line: The line from East Finchley to Mill Hill East was opened in 1867, and from Finchley Central to High Barnet in 1872, both by the Great Northern Railway . </Li> <Li> Piccadilly line: The westbound track between east of Ravenscourt Park and Turnham Green was built by LSWR in 1869, and originally used for eastbound main - line and District services . The eastbound track was built in 1911; it closed in 1916 but was re-used when the Piccadilly line was extended in 1932 . </Li> </Ul>

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