British Rail Class 950

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DB999601 at Reading on 15 May 1991.
DB999601 at Reading on 15 May 1991.
950 001 at Doncaster on 2 June 2004. It was then painted in Railtrack blue/green livery, but has since acquired Network Rail all-over yellow.
950 001 at Doncaster on 2 June 2004. It was then painted in Railtrack blue/green livery, but has since acquired Network Rail all-over yellow.

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

Unit No. DM DM
950001 999600 999601

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 the UK.

British Rail diesel multiple units
Diesel locomotives - Electric locomotives - Miscellaneous locomotives
Diesel multiple units
(DMUs and DEMUs) - Electric multiple units (EMUs) - Departmental multiple units
First-generation diesel units
Classes: 100 - 101 - 102 - 103 - 104 - 105 - 106 - 107 - 108 - 109 - 110 - 111 - 112 - 113 - 114 - 115  
116 - 117 - 118 - 119 - 120 - 121 - 122 - 123 - 124 - 125 - 126 - 127 - 128 - 129 - 130 - 131
Original TOPS: 140 - 141 - 142 - 143 - 144 - 145 - 147 - 148 - 149 - 150 - 160 - 161 - 162 - 163 - 164 - 166  
167 - 168 - 169 - 171 - 172 - 173 - 175 - 176 - 177 - 178 - 179 - 180 - 182 - 183 - 185 - 186  
188 - 189
Pre-TOPS: British United Traction - Derby Lightweight - Metro-Cammell - Railbus
GWR Railcars - LMS Railcars
Second-generation diesel units
Classes: 140 - 141 - 142 - 143 - 144 - 150 - 151 - 153 - 154 - 155 - 156 - 157 - 158 - 159 - 165 - 166
168 - 170 - 171 - 175 - 180 - 185
Diesel-electric units
Classes: 201 - 202 - 203 - 204 - 205 - 206 - 207 - 210 - 220 - 221 - 222 - 251 - 252 - 253 - 254 - 255
  SR designation: 3D - 3H - 3R - 3T - 4L - 6B - 6L - 6S
Departmental units
Classes: 901 - 930 - 950 - 951 - 960 - APT-E - MPV