GWR 4073 Class 5029 Nunney Castle is a Great Western Railway Castle Class steam locomotive. It was built at the GWR's Swindon Works in 1934, being outshopped on 28 May and taking the name of Nunney Castle near Frome, Somerset. The locomotive was used in many publicity and "life on the railway" type of photographs. During the first day of the evacuation of civilians during World War II, the locomotive hauled trains carrying children being taken from London to the safety of the countryside. Nunney Castle was also used to haul the Royal Train in October 1957 from London Paddington station to Gloucester.