GWR 4073 Class 4073 Caerphilly Castle

Caerphilly Castle is a member of the GWR 4073 Class built in August 1923.

The lead locomotive of its class, after a brief period of running-in service, between April and October 1924, the locomotive was exhibited at the British Empire Exhibition, which was held at Wembley Park, Wembley, north-west London.

Its August 1950 shed allocation was Bath Road, Bristol.

Refurbished for display purposes at Swindon Works, on 2 June 1961 she was formally handed over by Dr Richard Beeching at Paddington Station to the director of the Science Museum.

Pickfords hauled the engine from Park Royal Goods Depot to the museum in Kensington, using Scammell Constructor units on Sunday 4 June 1961.