Builder: 73/0: British Railways at Eastleigh Works
73/1: English Electric at Vulcan Foundry

Power: Bi-mode (electro-diesel)

Built: 1948 (D2341); 1952–1962 (D2200-2340)

Number in class: 49

Withdrawn: 1972-present

Numbers: E6001–E6049; later 73001–73006, 73101–73142; 73201-73213; 73235; 73951-73952; 73961-73971