and 051 was reformed as DB975029-DB975027-DB975030, but was withdrawn in late 1970, and the vehicles scrapped, except for one remaining DTBSO M75165, which was rebuilt to EPB standards and converted for Departmental Use in 1976 as Test Coach “Mars” ADB975032, based at Strawberry Hill, for commissioning refurbished Class 410/411/412 EMUs, but it was scrapped on site by MRJ Phillips (contractors) in August 1987. One DMBSO was used as a Depot Pilot Unit No: 977385, nicknamed “The Beast”, at Strawberry Hill Depot for several years, numbered 501, but was later withdrawn and scrapped in 1995. Preservation Currently two vehicles have been preserved. The two carriages used by the MOD were put up for disposal in early 2006. The driving trailer, no. 75186, was saved for preservation and has moved to the Electric Railway Museum, Warwickshire. It was joined by driving motor no. 61183 in October 2006, and it was hoped that the centre trailer coach would also eventually be preserved, but was scrapped in 2006. When the Electric Railway Museum closed in 2017, DMBSO 61183 and DTBSO 75186 were moved away and were located on a private site at Finmere Railway Station, on the former Great Central Main line (closed 1966) in Buckinghamshire, although this site was under threat from HS2, so everything there has had to be moved again. In January 2020 the station site was vacated and handed over to HS2. DMBSO 61183 and DTBSO 75186 were moved to MoD Bicester for storage after closure of Finmere Railway Station References Further reading External links 501 Train-related introductions in 1957