The 900 series classes were reserved for

multiple units A multiple-unit train (or multiple unit (MU)) is a self-propelled train composed of one or more Coach (rail), carriages joined, and where one or more of the carriages have the means of propulsion built in. By contrast, a locomotive-hauled ...

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

electrical multiple units An electric multiple unit or EMU is a multiple-unit train consisting of self-propelled carriages using electricity as the motive power. An EMU requires no separate locomotive, as electric traction motors are incorporated within one or a number ...

(EMU) (ex-300 and 500 series) and 960 to other diesel multiple units (DMU) (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 Sandite is a Chemical substance, substance used on railways in the UK, Republic of Ireland, Ireland, US, the Netherlands and Belgium to combat Slippery rail, leaves on the line, which can cause train wheels to slip and become damaged with flat ...

/De-icer units, ex-Classes

201 Year 201 ( CCI) was a common year starting on Thursday of the Julian calendar. At the time, it was known as the Year of the Consulship of Fabianus and Arrius (or, less frequently, year 954 ''Ab urbe condita''). The denomination 201 for this yea ...

203 Year 203 ( CCIII) was a common year starting on Saturday of the Julian calendar. At the time, it was known as the Year of the Consulship of Plautianus and Geta (or, less frequently, year 956 ''Ab urbe condita''). The denomination 203 for this ye ...

205 Year 205 ( CCV) was a common year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Aurelius and Geta (or, less frequently, year 958 ''Ab urbe condita''). The denomination 205 for this year h ...

, and

207 Year 207 (Roman numerals, CCVII) was a common year starting on Thursday of the Julian calendar. At the time, it was known in Rome as the Year of the Consulship of Maximus and Severus (or, less frequently, year 960 ''Ab urbe condita''). The deno ...

) *Class 960 (Departmental DMUs) * Class 999 (Prototype PPM for use in passenger trial) *

Multi-Purpose Vehicle Minivan (sometimes called simply a van) is a car classification for vehicles designed to transport passengers in the rear seating row(s), with reconfigurable seats in two or three rows . The equivalent classification in Europe is MPV (multi-pu ...

(Purpose-built

departmental vehicle Departmental vehicles, also called departmental wagons or engineering vehicles, are special railway vehicles used to support the engineering functions of the railway.Ellis, Iain (2006). ''Ellis' British Railway Engineering Encyclopaedia''. Lulu, p. ...

Gas turbine multiple unit

APT-E The APT-E, for Advanced Passenger Train Experimental, was the prototype Advanced Passenger Train tilting train unit. It was powered by gas turbines, the only multiple unit so powered that was used by British Rail. The APT-E consisted of two dr ...

(Experimental

Advanced Passenger Train The Advanced Passenger Train (APT) was a tilting high speed train developed by British Rail during the 1970s and early 1980s, for use on the West Coast Main Line (WCML). The WCML contains many curves, and the APT pioneered the concept of active ...

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 __NOTOC__ Year 501 ( DI) was a common year starting on Monday of the Julian calendar. At the time, it was known as the Year of the Consulship of Avienus and Pompeius (or, less frequently, year 1254 ''Ab urbe condita''). The denomination 501 fo ...

) *Class 937 (Sandite units, ex-Classes

302 __NOTOC__ Year 302 (CCCII) was a common year starting on Thursday of the Julian calendar. At the time, it was known as the Year of the Consulship of Constantius and Valerius or, less frequently, year 1055 ''Ab urbe condita''. The denomination ...

and

308 __NOTOC__ Year 308 ( CCCVIII) was a leap year starting on Thursday of the Julian calendar. It was known in the Roman Empire as the Year of the Consulship of Diocletian and (Galerius) Maximianus (or, less frequently, year 1061 ''Ab urbe condit ...

) *Class 960 (Test units, ex-Classes

309 __NOTOC__ Year 309 ( CCCIX) was a common year starting on Saturday of the Julian calendar. In the Roman Empire, it was known as the Year of the Consulship of Licinianus and Constantius (or, less frequently, year 1062 ''Ab urbe condita''). The ...

and

310 __NOTOC__ Year 310 ( CCCX) was a common year starting on Sunday of the Julian calendar. At the time, it was known as the Year of the Consulship of Andronicus and Probus (or, less frequently, year 1063 ''Ab urbe condita''). The denomination 310 ...

)

References

External links

* * {{Network Rail Departmental Multiple Unit Classes British Rail Departmental Units British Rail multiple units British Rail departmental multiple unit classes

Diesel multiple units

Gas turbine multiple unit

Electric multiple units

See also

References

External links