Camden Town is a London Underground station on the Northern line. It is a major junction for the line, as it is where the Edgware and High Barnet branches merge from the north, and is also where they split to the south into the Bank and Charing Cross branches for the journey through Central London. It is particularly busy with visitors to the Camden markets at weekends, and, until 2019, was exit-only on Sundays to prevent overcrowding. Northbound, the next stations are on the Edgware branch and on the High Barnet branch. Southbound, the next stations are on the Bank branch and on the Charing Cross branch. The station is in Travelcard Zone 2. History Charing Cross, Euston and Hampstead Railway The station was first proposed as part of the original route of the Charing Cross, Euston and Hampstead Railway (CCE&HR) (now part of the Northern line). Proposals for the line had existed since 1893, but construction did not begin until the American entrepreneur Charles Tyson Yerkes invested in the line in October 1900. Work started in July 1902, and the station was opened on 22 June 1907 by David Lloyd George, then President of the Board of Trade. The line here branched into two routes, to Hampstead and to Highgate. The line to Hampstead (now the Edgware branch) is under Chalk Farm Road; the line to Highgate (now the High Barnet branch) is under Kentish Town Road. With the narrowness of the roads above, and the necessity to keep directly beneath them to avoid having to pay compensation to landowners during construction, on both branches the northbound platform is directly above the southbound one. The two roads meet at an angle of 35° forcing the station into an unusual V shape. The surface building was designed by the Underground Electric Railways Company of London's (UERL's) architect Leslie Green. At the apex of the V was a junction allowing northbound trains to take either of the branches north, and likewise allow the trains south from the branches to join the single southbound track under Camden High Street. This resulted in four connecting tunnels. When the CCE&HR and City & South London Railway (C&SLR) lines were joined together after the C&SLR became part of the Underground Group on 1 January 1913, a short extension was planned from the Euston terminus of the City & South London Railway to connect with the