The 900 series classes were reserved for multiple units in departmental stock, most of which were converted from old passenger units. In broad terms, Classes 930-935 were allocated to Southern Region multiple units (ex-200 and 400 series), 936 & 937 to other EMUs (ex-300 and 500 series) and 960 to other DMUs (ex-100 series). In recent years, this has been less rigidly adhered to.
Diesel multiple units
- Class 901 (Test units, ex-Class 101)
- Class 930 (Departmental SR DEMUs)
- Class 950 (Purpose-built test unit, similar to Class 150)
- Class 951 (Sandite/De-icer units, ex-Classes 201, 203, 205, and 207)
- Class 960 (Departmental DMUs)
- Class 999 (Prototype PPM for use in passenger trial)
- Multi-Purpose Vehicle (Purpose-built departmental vehicles)
Gas turbine multiple unit
- APT-E (Experimental Advanced Passenger Train unit)
Electric multiple units
The original use for the Southern Region (SR) classes are included in brackets; these designations have been less rigidly applied in recent years.
- Class 910 (Test units, ex-Class 488)
- Class 920 (3PEP prototype unit)
- Class 930 (SR Sandite and de-icing units)
- Class 931 (SR route learning and stores units)
- Class 932 (SR research and tractor units)
- Class 933 (SR mobile instruction units)
- Class 935 (4PEP research units)
- Class 936 (Sandite units, ex-Classes 311 and 501)
- Class 937 (Sandite units, ex-Classes 302 and 308)
- Class 960 (Test units, ex-Classes 309 and 310)
See also
- British Rail locomotive and multiple unit numbering and classification
- SR multiple unit numbering and classification
External links