London Underground D78 Stock total of five 3-car sets, to be built as BMMUs, in June 2018. 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 The first units were withdrawn in January 2015 with the last withdrawn on 21 April 2017.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
London Underground A60 and A62 Stock London Underground A60 and A62 Stock The London Underground A60 and A62 Stock was a type of sub-surface rolling stock which operated on the Metropolitan line of the London Underground from 12 June 1961 to 26 September 2012, and on the East London Line from 1977 until 22 December 2007, when it closed to be converted into London Overground (except in 1986, when one person operation conversion of the fleet took place). The stock was built in two batches (A60 and A62) by Cravens of Sheffield in the early 1960s, and replaced all other trains on the line. At the