A highly detailed O gauge model of the Pressed Steel built single car BR class 121 diesel multiple unit trains. 15 of these double-ended single car units were built in 1960 to supplement the Gloucester cars on branch lines and shuttle services. The majority of the type seemed to be allocated to the Western region, but examples could be found all the way up to Scotland. In addition to branch shuttle duties these flexible single cars were often used to add capacity at peak hours, as substitute motor cars on 3-car sets and for driver route learning/refresher duties. 4 cars were retained for shuttle services into the 2000s, these now making up a total of 12 in preservation.
This model is finished as car 55024 in the BR plain blue livery carried from the late 1960s until the early 1980s.