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| British Rail Metro-Cammell Lightweight | |
|---|---|
 An Eastern Region set at Brundall | |
| In service | 1955–1981 |
| Manufacturer | Metropolitan Cammell |
| Scrapped | 1967–1969, 1981 |
| Number built | 36 sets (72 cars) |
| Number scrapped | All |
| 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 |
| Operators | British Rail |
| Specifications | |
| 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 |
| Braking system(s) | Vacuum |
| 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.