GWR 4073 Class 5080 Defiant
GWR 4073 Class 5080 Defiant is a steam locomotive. It was originally built as Ogmore Castle in May 1939 at Swindon Works, the engine being one of the many popular GWR Castle Class. Its first shed allocation was Old Oak Common.
After transfer to Cardiff (Canton), the engine was renamed Defiant in January 1941, commemorating one of the many types of aircraft which had taken part in the Battle of Britain. The name Ogmore Castle later rotated through sister engines 5056, 7007 and 7035. After the arrival of Britannia class Pacifics on the Western Region of British Railways, in 1959 it was moved to Carmarthen, staying there until its final move to Llanelli in May 1961.
It was sold to the Standard Gauge Steam Trust (since renamed Tyseley Locomotive Works), initially for spare parts for the 7029 Clun Castle, and left as the 62nd departure from Barry in August 1974. Its restoration was completed in June 1988, and it ran for a number of years. After its boiler certificate expired, it was sent to be displayed at the Buckinghamshire Railway Centre, where it presently remains.