Changes

Some existing locomotives were therefore renumbered under this policy, for example the 13xxx series became Dxxxx D3xxx/D4xxx with [[BR Class 08 D3022|13022]] becoming D3022.After the end of steam the 'D' prefix was omitted, so that for example D821 became 821. Classes 35 and 52 with their cast numbers and numberplates had the 'D' painted out (or sometimes removed), although enthusiasts sometimes removed the paint to leave the original prefix and number showing.

A more significant renumbering was carried out in the early 1970s after BR introduced [[TOPS codes]] at the end of the 1960s. Diesel locomotives were allocated into classes with the class being the first two digits in the new locomotive number. D3022 was allocated into Class 08, resulting in another new number of 08015. Certain classes slated for early withdrawal were allocated a class number and never received the five figure TOPS number, these included the Class 11 and the WR diesel hydraulic Classes 14, 35, 42 and 52 now resident on the SVR.