| Date built | 1956–1959 |
| Built by | Cravens |
| Built at | No data |
| Number built | 302 |
| Status | Preserverd |
| Family name | First generation |
| Owner | Various |
| Operated by | Various |
| Originally operated by | Various |
| Original owner | Various | Date entered service | 1988 |
| Date refurbished | N/A |
| formation | 2-cars sets: DMBS-DTCL or DMBS-DMCL, 3 cars sets:DMBS-TCL-DMCL |
| Capacity | No Information |
| Predecessor | Steam locomotives
and carriages |
| Sucsesser | Class 313 |
Specifications |
| Maximum speed | 70 mph (113 km/h) |
| Power output | 150 bhp (112 kW) each engine |
| Braking system | No Information |
| Safety systems | No imformation |
| Coupling system | Screw-link couplings British Standard gangways |
| Multiple working | Blue Square |
| Engine type | British United Traction x2 |
| Unit number | Status | Operator | Owner | Notes |
| 51485 | Preserved | No information | East Lancashire Railway | N/A |
| 56121 | Preserved | No information | East Lancashire Railway | N/A |
| 56456 | Preserved | No information | Llangollen Railway | N/A |