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British Rail Class 950

British Rail Class 950
950001 at Upton on 15 January 2014
Manufacturer BREL York
Family name Sprinter
Number built 1 trainset
Formation 2 cars per trainset
Operator(s) Network Rail
Maximum speed 75 mph (121 km/h)
Track gauge 1,435 mm (4 ft 8 12 in) standard gauge

The British Rail Class 950 is a diesel multiple unit that was purpose-built for departmental use as a track assessment unit.


  • Description 1
  • Current operations 2
  • Fleet details 3
  • References and notes 4


Cab of 999600, showing the video camera and laser measurement equipment.

It was built in 1987 using the same bodyshell as the Class 150/1 "Sprinter" units that were built from 1985-1986. It was originally classified as a Class 180 test unit, but since this designation is now used by the new First Great Western "Adelante" units, it has been reclassified into the departmental series. The unit is formed of two driving motor vehicles. Individual carriages numbered as follows:

  • DM: 999600-999601

Current operations

The unit is currently painted in a plain overall yellow livery with Network Rail branding. It mostly works on lines also used by Sprinters and Pacers where the track quality is not good enough for larger and heavier track assessment stock. It is able to operate over most railway lines around Great Britain. The unit is based at the RTC in Derby.

Fleet details

Class Operator No. Built Year Built Cars per Set Unit nos. Notes
Class 950 Network Rail 1 1987 2 950001

References and notes

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