London Underground 1992 Stock

The London Underground 1992 Stock is a type of rolling stock used on the Central line and Waterloo & City line of the London Underground. This was similar to the 1980 Stock for the Orange Line and it is largely similar to the prototypes that was usede for the Orange Line from 1977 to 1979.

History
The 1992 Stock was built by British Rail Engineering Limited (BREL) (under ABB, later Adtranz and now Bombardier Transportation) for the Central line following extensive testing of the three 1986 tube stock prototype trains. Even so, the introduction of this stock was far from trouble-free and there were many technical teething problems.

Eighty-five trains were ordered from BREL, each formed of four two-car units (two units have driving cabs, the others are fitted with shunting controls). Upon entering service in April 1993, the new units gradually replaced the previous 1962 tube stock, which was finally withdrawn two years later. The trains were manufactured at the Derby Litchurch Lane Works.

The 1992 stock's design is reminiscent of the 1986 prototypes. The new 2009 stock trains, built by Bombardier Transport for the Victoria line, are more like the 1992 stock in shape and design than the 1995/1996 stock.

Waterloo & City Line
After the initial construction run, an additional ten two-car units were built for British Rail for the Waterloo & 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 stock. The line's limited access meant that this was first time that the units had been brought above ground since their introduction 12 years earlier. The refurbishment of the trains saw them painted in the London Underground white, red and blue livery in place of the Network SouthEast colours used since the stock's introduction.

In January 2018, the announcements were again revised for certain stations, to include new lines and connections (such as London Overground, TfL Rail and the construction of Wood Lane station) that did not exist in 2003.