The British Rail Class 104 diesel multiple units were built by Birmingham Railway Carriage and Wagon Company from 1957 to 1959.

A product of British Rail's Modernisation Plan of 1954,[2] the 104s were designed for general branch line and commuter routes.

[3] The first units ordered were for the London Midland Region, with the majority of the class for use in North West of England.

The last two London Midland DTCL vehicles to survive, M54182 & M54183, were converted in 1987/1988 into loco hauled Sandite cars and renumbered ADB977554/ADB977555 respectively.

[9] In 2008 after several years in storage, the vehicle was restored externally, retaining its departmental condition and run in a demonstration capacity with Class 37 37075 for a gala weekend at the Churnet Valley Railway.

[14] Between 2005 & 2010 attention turned to the rebuild of unique Trailer Composite Lavatory (TCL) M59137 to strengthen the 2-car set to 3 cars, however limited resources put the restoration on hold.

[14] Driving Trailer Composite Lavatory (DTCL) ADB977554 was also cosmetically restored into BR Blue livery in 2008 and performed demonstration sandite trains that year with Class 37 Diesel 37075.

[16] The railway also have a "spare" power car (M50447) which was used as a mess-coach and workshop between 1994 & 2011 before being selected itself for a restoration to operating condition, which is currently ongoing.

[20] The Telford Steam Railway was home to the remaining four vehicles (also on long-term loan), which arrived between 1999 and 2001 from Oswestry, Crewe and Meadowhall.