Carriage section, British Railways Mark I, 3rd class compartment, about 1951. The mock up section is half a compartment, open on one side, with a row of three seats upholstered in 'boomerang' moquette. The exterior of the carriage section is painted in the crimson and cream livery known as 'blood and custard'. The mock up was built for exhibition at the Festival of Britain in 1951.

British Railways 3rd class Mark 1 carriage mock-up built for exhibition at the Festival of Britain in 1951. This carriage section was used to publicise new standard carriages introduced by the recently nationalised British Railways. It is painted in the crimson and cream livery colloquially known as 'blood and custard'. The seats are upholstered in a bright moquette known as 'boomerang' because of its pattern. About 9,000 Mark 1 carriages were built and they remained in use on British Railways into the 1990s.