GWR 6400 Class

The GWR 6400 Class is a class of 0-6-0 pannier tank steam locomotives introduced by Charles Collett in 1932. All forty were auto-fitted, with the remote-control equipment needed to work autotrains. The design was closely related to the 1930 GWR 5400 Class and to the 1936 GWR 7400 Class, which was similar but had no autotrain apparatus and a higher boiler pressure of 180 psi. Their small 4 ft 7.5 in driving wheels let them work hillier routes than the 5400 Class, and they were first allocated to the South Wales valleys, later working branch lines in Devon and around Plymouth until the early 1960s. Three of the 6400 Class have survived into preservation.