| British Rail Class 950 | |
|---|---|
| Manufacturer | British Rail Engineering Limited |
| Built at | Holgate Road Works, York |
| Family name | Sprinter |
| Constructed | 1987 |
| Number built | 1 |
| Formation | 2 cars: DM-DM |
| Fleet numbers |
|
| Operator | Network Rail |
| Depot | Railway Technical Centre (Derby) |
| Specifications | |
| Car body construction | Steel |
| Car length | 19.930 m (65 ft 4.6 in) |
| Width | 2.816 m (9 ft 2.9 in) |
| Height | 3.774 m (12 ft 4.6 in) |
| Maximum speed | 75 mph (121 km/h) |
| Prime mover | 2 × Cummins NT855-R5 (one per vehicle) |
| Engine type | Inline-6 4-stroke turbo-diesel |
| Displacement | 14 L (855 cu in) per engine |
| Power output | 213 kW (286 hp) per engine |
| Transmission | Voith T 211 r (hydrokinetic) |
| UIC classification | 2′B′+B′2′ |
| Braking system | Electro-pneumatic (tread) |
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge |
The British Rail Class 950 is a diesel multiple unit that was purpose-built by British Rail Engineering Limited's Holgate Road carriage works for the British Rail Research Division for use as a track assessment unit. It is currently operated by Network Rail.

It was built in 1987 using the same bodyshell as the Class 150/1 Sprinters. It was originally classified as a Class 180.
In December 2024, Network Rail announced that the unit would be withdrawn and disposed of, to be replaced by additional (modified) Class 153s.
| Class | Operator | Qty. | Year built | Cars per unit | Unit nos. | Notes |
|---|---|---|---|---|---|---|
| 950 | Network Rail | 1 | 1987 | 2 | 950001 |
Media related to British Rail Class 950 at Wikimedia Commons