"Electro-diesel" locomotives are primarily powered by electric traction motors picking up the electrical current from the electrified "third rail", but also have a small (600hp) diesel engine to power the loco away from the electrified power rail, principally in goods yards.  Primarily used on the Southern Region, some were used for a short period for departmental engineers trains in the Mersey Area.

Hornby R3045 Class 73 Electro-diesel loco : Gatwick Express: 73202 "David Berry £53.00	Dapol 4D-006-000 : Class 73/2 Electro-diesel Intercity: 73102 "Airtour Suisse" £139.00
Dapol 4D-006-001 : Class 73/1 Electro-diesel; blue, large logo : 73105 WAS £139 £125.00	Dapol 4D-006-006 : Class 73/1 Electro-diesel Engineers "Dutch" livery: 73138 WAS £139 £125.00
Dapol 4D-006-007 : Class 73/2 Electro-diesel GB Railfreight: 73206 "Lisa" WAS £139 £125.00	Dapol 4D-006-012 : Class 73/2 Electro-diesel South-West Trains: 73235 £145.00
Dapol 4D-006-013S : Class 73/2 Electro-diesel; GTR Southern : 73202 "Gatwick Express" SOUND £299.00	Hornby R2654: Class 73/2 Electro-diesel - GB Railfreight : 73204 £55.00