London Underground D78 Stock

The London Underground D78 Stock, commonly called D Stock, was sub-surface rolling stock that operated on the District line, except on the Wimbledon to Edgware Road service. It was ordered in 1976, and seventy-five six-car trains were built by Metro-Cammell at Washwood Heath, the first entering service on 28 January 1980 and the last delivered in 1983. The traction motors were the same LT118 type as on the 1973 Tube Stock, and the bogies were the same too, unlike other sub-surface rolling stock. The driver's cab was more ergonomic, with a swivelling seat and a joystick that replaced the dead man's handle. The first units were withdrawn in January 2015 and the last was withdrawn on 21 April 2017.