London Underground D78 Stock London Underground D78 Stock The London Underground D78 Stock, commonly referred to as D Stock, was a type of sub-surface rolling stock which operated on the District line of the London Underground, except on the Wimbledon to Edgware Road service. Following the withdrawal of the C Stock in June 2014, these were the oldest subsurface trains in service on the London Underground. The first units were withdrawn in January 2015 with the last withdrawn on 21 April 2017. The D stock was ordered in 1976 to replace the pre-war CO/CP Stock and post-war R Stock on the District line. Seventy-five
Wimbledon station taking over the West Anglia Main Line north of there). This would provide another set of transport links for the area and direct services to and . There is also a proposal for an extension of the Tramlink services running from Wimbledon to Sutton via Morden, St. Helier and Rose Hill. The typical off-peak service (Monday to Saturday) frequency is: National Rail London Underground Wimbledon station Wimbledon is a National Rail, London Underground, and Tramlink station located on Wimbledon Bridge, Wimbledon in London, and is the only London station that provides an interchange between main line rail, Underground, and Tramlink.