No. 7050 locomotive was an experimental locomotive built by the Drewry Car Co. at the English Electric Preston works in 1934. It carried an original number of 7400 only within the works and was delivered as LMSR number 7050. For six years it was used for dock shunting at Salford before being loaned to the Air Ministry in 1940. It was withdrawn from LMSR stock in March 1943 and sold to the War Department (WD) which numbered it 224. Subsequent renumberings by the WD, and later the Army, saw it carry numbers 70224 (in 1944), 846 (1952) and 240 (1968).