The 309 members of the class 37 underwent many changes in their long career on British railways. Under the TOPS system each change was reflected in a change of identity.
List of locomotives + Legend Strikethrough Denotes TOPS numbers allocated, but never actually carried by the locomotive. The D prefix to British Transport Commission (BTC) numbers was generally dropped after August 1968. Colour KeyIn service Stored ScrappedPreserved
Jump to D66XX D67XX D68XX D69XX