London Underground 1992 Stock & City line, which until 1994 was part of the national railway network, and became their Class 482. When this line passed to London Underground at the start of the process to privatise British Rail on 1 April 1994, these units also passed to London Underground. The vehicles are essentially identical to those used on the Central line; the main difference being that trip-cocks are used for protection instead of ATO/ATP. Transport for London and Metronet closed the Waterloo & City line for five months from April to September 2006 to allow major upgrade work on the tunnels and rolling
History of the London Underground appeared for the first time. On 1 July 1933, the London Passenger Transport Board (LPTB), was created as a public corporation and the Metropolitan, the UERL underground railways, tramway companies and bus operators were merged into one organisation. On the former Metropolitan Railway the Brill Branch closed in 1935, followed by the line from to Verney Junction in 1936. It was proposed to electrify to Amersham with additional tracks from Harrow to Rickmansworth and to extend the Bakerloo line to Stanmore to relieve the bottleneck on the Metropolitan from Baker Street to Finchley. Before any work was started on the