|British Rail Metro-Cammell Lightweight|
An Eastern Region set at Brundall
|Number built||36 sets (72 cars)|
|Formation||2 car sets: DMBS-DTSL or DMBS-DTCL|
|Capacity||DMBS: 57 or 53 second class seats|
DTSL: 72 second class
DTCL: 12 first and 53 second class
|Train length||114 ft 0 in (34.75 m)|
|Car length||57 ft 0 in (17.37 m)|
|Width||9 ft 3 in (2.82 m)|
|Weight||DMBS: 31 long tons 10 cwt (70,500 lb or 32,000 kg)|
DTSL: 25 long tons 0 cwt (56,000 lb or 25,000 kg)
|Prime mover(s)||Two BUT (AEC) 6-cylinder diesels|
|Power output||150 hp (112 kW) each engine|
|Transmission||Mechanical: 4-speed epicyclic gearbox|
|Track gauge||4 ft 8 1⁄2 in (1,435 mm)|
In 1955, Metropolitan Cammell produced its first lightweight Diesel multiple units, the prototypes of what were to become British Rail's most successful and longest-lived First Generation DMU type, the Class 101.
The seven London Midland Region sets (formed DMBS + DTCL) were used on the Bury-Bacup line services, while the other sets (formed DMBS + DTSL) were all allocated to the Eastern Region. These sets were used on a variety of lines in East Anglia as well as the (then) non-electrified lines in Essex (Romford-Upminster and Wickford-Southminster branches).
They proved to be very successful, but with line closures continuing through the 1960s, including many in East Anglia where the type was first used, their non-standard coupling arrangements left them prone to early withdrawal, which took place during 1967–1969.
All were scrapped following withdrawal, except two (79047 + 79053), which were taken into departmental (non-revenue earning) service as 975018 + 975019. They were used at the Railway Technical Centre in Derby as Laboratory 21: Plasma Torch Research. When this extended life was complete, they too were scrapped, in 1981.
|Lot No.||Type||Diagram||Qty||Fleet numbers||Notes|
|30190||Driving Motor Brake Second (DMBS)||591||29||E79047–79075||56 seats|
|30190||Driving Motor Brake Second (DMBS)||592||7||M79076–79082||52 seats|
|30191||Driving Trailer Second with Lavatory (DTSL)||593||29||E79263–79291||72 seats|
|30191||Driving Trailer Composite with Lavatory (DTCL)||594||7||M79626–79632||12 first 53-second|
- Great Eastern Journal No 64 (Great Eastern Railway Society)