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Northern Line

The Northern Line is a deep-level tube line of the London Underground, coloured black on the Tube map. With two routes through the central area, it is one of the more complicated lines on the system.

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The City and South London Railway, London's first deep-level tube railway, was opened in 1890 from Stockwell[?] to a now-disused station at King William Street[?]; by 1907 it had been extended to run from Clapham Common[?] to Euston[?]. The Charing Cross, Euston and Hampstead Railway (known as the "Hampstead Tube") was opened in 1907 and ran from Charing Cross to Golders Green[?] and Highgate (now Archway[?]). During the 1920s connections were built so that the two lines joined at Camden Town and Kennington[?], and the lines were extended to Morden[?] in the south and Edgware[?] in the north. The resulting line became known as the Morden-Edgware Line, and was eventually named the Northern Line in 1937.

In the 1930s an ambitious plan (the "Northern Heights") was hatched to link the Highgate branch and the Northern City Line (which ran from Moorgate[?] to Finsbury Park) to existing suburban railways and extend branches to High Barnet[?], Alexandra Palace[?] and Bushey Heath. In the event only the High Barnet branch and a single track to Mill Hill East[?] were finished before work was interrupted by the Second World War. After the war the plan was abandoned.

Beyond Highgate station, the Highgate branch runs on tracks which were formerly a suburban railway; this can be seen in the design of the stations.


High Barnet branch

Edgware branch

Camden Town

The junctions which connect the two northern branches of the Northen Line to the two central branches are just south of Camden Town station. The station has a pair of platforms on each of the two northern branches, and southbound trains can depart toward either Charing Cross or Bank from either of the two southbound platforms.

Charing Cross branch

(Also known as the West End branch.)

Southbound trains on this branch often terminate at Kennington, where they are able to reverse by means of a loop track.

Bank branch

(Also known as the City Branch.)

Morden branch

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