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{{short description|Classification and number system by Southern Railway of British Rail}}
 
{{Use dmy dates|date=January 2017}}
{{Use British English|date=January 2017}}
{{More citations needed|date=March 2009}}
The [[Southern Railway (UK)|Southern Railway]] created '''classification and numbering systems''' for its large fleet of [[electric multiple unit]]s, perpetuated by the Southern Region of [[British Rail]] until the early 1980s, when the impact of [[TOPS]] was felt. Some stock is still allocated Southern-style classifications in a semi-official manner.
 
==Classification==
The early AC electric multiple units were referred to by a two-letter code. This was adapted for the DC third-rail system that was adopted by the Southern Railway, with units being given a three-letter code (sometimes two letters) prefixed by the number of cars in each unit, e.g. 4SUB for a 4four-car suburban unit.
 
The Southern Region perpetuated this, and the same principles were adopted for diesel-electric multiple units but with single-letter codes. The last new type to be officially allocated a designation in this series was the PEP stock of the early 1970s. Some types built since have been given semi-official designations in this style.▼
 
▲The Southern Region perpetuated this, and the same principles were adopted for diesel-electric multiple units but with single-letter codes. The last new type to be officially allocated a designation in this series was the PEP stock of the early 1970s. Some types built since have been given semi-official designations in this style.
''This is different from the system used by British Rail (adopted from the LNER) to indicate the type of non-powered coach — see [[British Rail coach designations]].''▼
 
▲''This is different from the system used by British Rail (adopted from the LNER) to indicate the type of non-powered coach — see [[British Rail coach designationstype codes]].''
Although some sources give class numbers to some pre-war stock (2BIL, 2HAL, 4LAV, 4COR/BUF/GRI, 5BEL) these were never officially allocated (and in any case do not conform to the system), all of these types having been withdrawn before the introduction of TOPS.
 
===AC EMUs===
{| class="wikitable"
!SR Designationdesignation
!Meaning
|-
Line 32 ⟶ 30:
===DC EMUs===
{| class="wikitable sortable"
!SR Designationdesignation
!BR Classclass
!Meaning
|-
Line 45 ⟶ 43:
|-
|align=center|TLV
|align=center|[[British Rail Class 499 (Luggage Van)|499]]
|'''T'''railer '''L'''uggage '''V'''an
|-
|align=center|2BIL
|align=center|-[[British Rail Class 401|401]]
|'''Bi'''-'''L'''avatory<ref name=SRsemifast>[[#IanAllan1968|Ian Allan ABC, 1968]] ''British Railways Motive Power Survey'', p.15 "2NOL, 2HAL and 2BIL ... no lavatory, half lavatory and both lavatory, depending on whether toilet facilities were provided in either one or both coaches of a two-car set or not provided at all"</ref>
|-
Line 57 ⟶ 55:
|-
|align=center|2HAL
|align=center|-[[British Rail Class 402|402]]
|'''Ha'''lf '''L'''avatory<ref name=SRsemifast />
|-
Line 73 ⟶ 71:
|-
|align=center|2PAN
|align=center|-[[British Rail Class 402#2Pan|402]]
|'''P'''arcels '''a'''nd '''N'''ewspapers
|-
Line 117 ⟶ 115:
|-
|align=center|4BUF
|align=center|-[[British Rail Class 404|404]]
|'''Buf'''fet
|-
Line 128 ⟶ 126:
|'''C'''orridor '''E'''lectro-'''P'''neumatic Brake
|-
|align=center|4CIG<ref name="444SWT">{{cite magazine|title=Class 444<br>SWT|magazine=[[Modern Locomotives Illustrated]]|issue=178|date=August 2009|pages=44–53}}</ref>
|align=center|4CIG
|align=center|[[British Rail Class 421|421]]<ref name="444SWT"/>
|'''C'''orridor Br'''ig'''hton<ref name=4BIG />
|-
|align=center|4COR
|align=center|-[[British Rail Class 404|404]]
|'''Cor'''ridor
|-
Line 149 ⟶ 147:
|-
|align=center|4GRI
|align=center|-[[British Rail Class 404|404]]
|'''Gri'''ddle Car
|-
|align=center|4HIT
|align=center|[[British Rail Class 455|455]]
|'''HI'''gh density, '''T'''ightlock coupling.<ref>{{cite magazine |author=<!--Staff writer(s); no by-line.--> |magazine=Live Rail |issn=0142-7326 |publisher=Southern Electric Group |page=180 |date=December 1982 |title=Regional Review }}</ref> Proposed for the class, but not used.<ref>{{cite magazine |author=<!--Staff writer(s); no by-line.--> |magazine=Live Rail |issn=0142-7326 |publisher=Southern Electric Group |page=231 |date=April 1983 |title=Editor's Note }}</ref>
|-
|align=center|4JOP<ref name="MLI"/>
|align=center|[[British Rail Class 458|458/0]]<ref name="MLI"/>
|'''J'''uniper '''O'''utersuburban '''P'''orterbrook.<ref name="MLI">{{cite magazine|title=Alstom 'Juniper' Platform|magazine=[[Modern Locomotives Illustrated]]|issue=223|date=February 2016|pages=49–59}}</ref>
|-
|align=center|4JOP4JUP
|align=center|[[British Rail Class 458|458/04]]
|'''Ju'''ni'''p'''er
|'''J'''uniper '''O'''utersuburban '''P'''orterbrook.<ref>https://www.flickr.com/photos/dave58282/6190227922/</ref>
|-
|align=center|[[SR Class 4Lav|4LAV]]
Line 177 ⟶ 179:
|-
|align=center|4RES
|align=center|-[[British Rail Class 404|404]]
|'''Res'''taurant
|-
Line 200 ⟶ 202:
|'''VE'''P '''G'''atwick Express
|-
|align=center|4VEP<ref name="444SWT"/>
|align=center|[[British Rail Class 423|423]]<ref name="444SWT"/>
|'''V'''estibule '''E'''lectro-'''P'''neumatic Brake
|-
Line 213 ⟶ 215:
|-
|align=center|5BEL
|align=center|-[[British Rail Class 403|403]]
|Brighton '''Bel'''le
|-
Line 220 ⟶ 222:
|'''Des'''iro (Unofficial)
|-
|align=center|5JUP<ref name="Fleetlist">{{cite magazine|title='Juniper' Fleet List|magazine=[[Modern Locomotives Illustrated]]|issue=223|date=February 2016|pages=70–71}}</ref>
|align=center|5JUP
|align=center|[[British Rail Class 458|458/5]]<ref name="Fleetlist"/>
|'''Ju'''ni'''p'''er<ref>https://scontent-lht6-1.xx.fbcdn.net/v/t1.0-9/40684950_2026912793997129_4172825448373288960_o.jpg?_nc_cat=0&_nc_eui2=AeFuTohCYD4fmQGXuuTVmkTXOIpVqk7ODUb4PTD2c1JjDoA_QCpIBL-qxsuCABbVLmGrkDBVpGGBVjC7Y9BrbGaDRXdN04T8YYGUmER-e2fjFg&oh=1b1cedc7fcf07c08baa0ee6cfa494be9&oe=5BF85B83 {{dead link|date=February 2022}}</ref>
|-
|align=center|5TCB
Line 264 ⟶ 266:
|'''D'''edicated Br'''ig'''hton
|-
|align=center|8GAT<ref name="MLI"/>
|align=center|[[British Rail Class 460|460]]<ref name="MLI"/>
|'''Gat'''wick Express<ref name="MLI"/>
|-
|align=center|8MIG
Line 280 ⟶ 282:
===Diesel-electric multiple units===
{| class="wikitable"
!SR Designationdesignation
!BR Classclass
!Meaning
|-
Line 315 ⟶ 317:
 
==Unit numbering==
Unit numbers were allocated from 1001, following the 1-10001–1000 set numbers of semi-fixed formations of hauled coaching stock. Different types of unit were given numbers:
 
{| class="wikitable"
|-
| 1001–1200
| Unpowered trailer units for working with 3SUB stock (this series was later expanded to include 989-1000989–1000)
|-
| 1201–1800
| 1201-1800
| 3SUB (ex-LSWR units with 1200 added to their original numbers)
|-
Line 328 ⟶ 330:
| Two-car inner-suburban (e.g. 2NOL)
|-
| 2001–2899
| 2001-2899
| Two-car outer-suburban (e.g. 2BIL)
|-
| 2901–2999
| 2901-2999
| Four-car outer-suburban (4LAV)
|-
| 3001–3999
| 3001-3999
| Four, five and six-car express (e.g. 4COR, 5BEL and 6PUL)<ref>The three 5BEL units were originally numbered 2051-3, but later renumbered 3051-3 to conform with the general scheme (''Southern Electric'' by G. T. Moody, Ian Allan Ltd., various dates).</ref>
|-
| 4001–4999
| 4001-4999
| Four-car inner-suburban (4SUB and 4DD)
|-
| 5001–5599
| 5001-5599
| British Railways four-car inner-suburban (4EPB)
|-
| 5601–6999
| 5601-6999
| British Railways two-car (e.g. 2HAP)
|-
| 7001–7999
| 7001-7999
| British Railways four-car outer-suburban (e.g. 4CIG)
|-
Line 352 ⟶ 354:
| Temporary eight-car (8VAB)
|-
| S1–S101
| S1-S101
| Departmental (non-revenue earning)
|}
Line 360 ⟶ 362:
{| class="wikitable"
|-
| 001–099
| 001-099
| Parcels and departmental (Sxxx units renumbered)
|-
| 301–999
| 301-999
| Trailer Controlcontrol (first digit indicated number of cars, e.g. 301 = 3TC)
|-
| 1001–1499
| 1001-1499
| Diesel Electricelectric Multiplemultiple Unitsunits (e.g. 6S)
|}
 
2PEP reused number 2001, 4REP from 3001 and 4PEP 4001/4002. This series was abandoned in 1983, when units were renumbered to fit in with the TOPS classification system, which had nominally been in use for a decade. Even then, many units displayed only the last four digits, dropping the first two digits -– e.g. unit [[British Rail Class 412|412]] 301 would have the number "2301" applied. Only with later units and 2xx series DEMUs were the full numbers shown, e.g. Classes [[British Rail Class 456|456]], [[British Rail Class 458|458/5]], [[British Rail Class 465|465]] and [[British Rail Class 466|466]], and some [[British Rail Class 455|Class 455]] sets, carry full 6six-digit numbers.
 
==See also==
Line 380 ⟶ 382:
 
==References==
*{{cite book |title=British Rail Locomotives and other motive power |year=1968 |publisher=[[Ian Allan Publishing|Ian Allan]] |___location=London |isbn=0-7110-0008-5 |ref=IanAllan1968 }}
*[http://www.bloodandcustard.com/bournemouth1966.html History of the TC /REP stock on BloodandCustard]
 
{{British railway rolling stock numbering and classification}}
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