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EspañolSR MULTIPLE UNIT NUMBERING AND CLASSIFICATION
(Redirected from SR Multiple Unit Numbering and Classification)
The Southern Railway created numbering and classification systems for its large fleet of electric multiple units that were perpetuated by the Southern Region of British Rail until the early 1980s, when the impact of TOPS was felt. Even now, some stock have still been allocated Southern-style classifications in a semi-official manner.
Unit numbers were allocated in a series commencing from 1001, which followed the set numbers given to semi-fixed formations of hauled coaching stock, 1-1000. Different types of unit were given numbers according to the following division:
This series was perpetuated by the Southern Region of BR, though with modifications, as older set numbers were reused for the following different types:
The 2Pep stock reused number 2001, the 4Rep stock reused numbers from 3001 and the 4Pep stock reused numbers 4001/4002. This series was abandoned only 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 only displayed the last four digits of their TOPS number, dropping the first two digits - e.g. unit 412 301 would have the number "2301" applied. Only with later units and the 2xx series DEMUs were the full numbers shown (e.g. Classes 455 and 456 carried full 6-digit numbers).
The early AC overhead electric multiple unit types were referred to by a two-letter code. This was adapted for the DC third-rail system that was adopted as standard by the Southern Railway, with unit type being given a three-letter code (sometimes two letters) prefixed by the number of carriages within each unit, e.g. 4Sub for a 4-car suburban set.
The Southern Region of British Rail perpetuated this method of classification, and the same principles were also adopted for diesel-electric multiple unit stock, but with single-letter codes. The last type to be officially allocated a designation in this series was the Pep stock of the early 1970s. However, some types built since then have been given semi-official designations in this style.
NB: This was 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.
★ List of British Rail classes
★ British Rail brand names
The Southern Railway created numbering and classification systems for its large fleet of electric multiple units that were perpetuated by the Southern Region of British Rail until the early 1980s, when the impact of TOPS was felt. Even now, some stock have still been allocated Southern-style classifications in a semi-official manner.
| Contents |
| Unit numbering |
| Classification |
| AC overhead EMUs |
| DC third rail EMUs |
| Diesel-electric multiple units |
| See also |
Unit numbering
Unit numbers were allocated in a series commencing from 1001, which followed the set numbers given to semi-fixed formations of hauled coaching stock, 1-1000. Different types of unit were given numbers according to the following division:
| 1001-1200 | Unpowered trailer units for working with 3Sub stock (this series was later expanded to include unit numbers 989-1000) |
| 1201-1800 | 3Sub stock (ex-LSWR units had 1200 added to their original number) |
| 1801-1999 | Two-car inner-suburban stock (e.g. 2Nol) |
| 2001-2899 | Two-car outer-suburban stock (e.g. 2Bil) |
| 2901-3999 | Four-, five- and six-car outer-suburban stock (e.g. 4Lav) |
| 4001-4999 | Four-car inner-suburban stock (4Sub and 4DD) |
| 5001-5599 | British Railways four-car inner-suburban stock (4EPB) |
| 5601-6999 | British Railways two-car stock (e.g. 2Hap) |
| 7001-7999 | British Railways four-car outer-suburban stock (e.g. 4Cig) |
| 8001 | Temporary eight-car formation (8Vab) |
| S1-S101 | Departmental (non-revenue earning) stock |
This series was perpetuated by the Southern Region of BR, though with modifications, as older set numbers were reused for the following different types:
| 001-099 | Parcels and departmental stock (Former Sxxx units renumbered into this series) |
| 301-999 | Trailer Control stock (first digit indicated number of cars, e.g. 301 = 3TC) |
| 1001-1499 | Diesel Electric Multiple Units (e.g. 6S) |
The 2Pep stock reused number 2001, the 4Rep stock reused numbers from 3001 and the 4Pep stock reused numbers 4001/4002. This series was abandoned only 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 only displayed the last four digits of their TOPS number, dropping the first two digits - e.g. unit 412 301 would have the number "2301" applied. Only with later units and the 2xx series DEMUs were the full numbers shown (e.g. Classes 455 and 456 carried full 6-digit numbers).
Classification
The early AC overhead electric multiple unit types were referred to by a two-letter code. This was adapted for the DC third-rail system that was adopted as standard by the Southern Railway, with unit type being given a three-letter code (sometimes two letters) prefixed by the number of carriages within each unit, e.g. 4Sub for a 4-car suburban set.
The Southern Region of British Rail perpetuated this method of classification, and the same principles were also adopted for diesel-electric multiple unit stock, but with single-letter codes. The last type to be officially allocated a designation in this series was the Pep stock of the early 1970s. However, some types built since then have been given semi-official designations in this style.
NB: This was 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.
AC overhead EMUs
| SR Designation | Meaning |
|---|---|
| CP | 'C'rystal 'P'alace Stock |
| CW | 'C'oulsdon & 'W'allington Stock |
| SL | 'S'outh 'L'ondon Stock |
DC third rail EMUs
| SR Designation | BR Class | Meaning |
|---|---|---|
| GLV | 489 | 'G'atwick 'L'uggage 'V'an |
| MLV | 419 | 'M'otor 'L'uggage 'V'an |
| TLV | 499 | 'T'railer 'L'uggage 'V'an |
| 2Bil | 401 | 'Bi'-'L'avatory Stock |
| 2EPB | 416 | 'E'lectro-'P'neumatic 'B'rake Stock |
| 2Hal | 402 | 'Ha'lf 'L'avatory Stock |
| 2Hap | 414 | 'Ha'l electro-'P'neumatic Brake Stock |
| 2Nol | - | 'No' 'L'avatory Stock |
| 2Pan | 402 | 'P'arcels 'a'nd 'N'ewspapers Stock |
| 2Pep | 446 | 'P'rototype 'E'lectro-'P'neumatic Brake Stock |
| 2Sap | 418 | 'S'econd-Class Only H'ap' Stock |
| 2SL | - | 'S'outh 'L'ondon Stock |
| 2Wim | - | 'Wim'bledon Line Stock |
| 3Cop | 421 | 'C'oastway 'O'pen 'P'lan |
| 3Sub | - | 'Sub'urban Stock |
| 3TC | 492 | 'T'railer 'C'ontrol Stock |
| 3Tis | 486 | Vec'tis' (Isle of Wight) Stock |
| 4Bep | 412 | 'B'uffet 'E'lectro-'P'neumatic Brake Stock |
| 4Big | 422 | 'B'uffet Br'ig'hton Stock |
| 4Buf | 404 | 'Buf'fet Stock |
| 4Cap | 413 | 'C'oastway H'ap' Stock |
| 4Cep | 411 | 'C'orridor 'E'lectro-'P'neumatic Brake Stock |
| 4Cig | 421 | 'C'orridor Br'ig'hton Stock |
| 4Cor | 404 | 'Cor'idor Stock |
| 4Des | 450 | 'Des'iro |
| 4DD | - | 'D'ouble 'D'ecker Stock |
| 4EPB | 415 | 'E'lectro-'P'neumatic 'B'rake Stock |
| 4Gri | 404 | 'Gri'ddle Car Stock |
| 4Jop | 458 | 'J'uniper 'O'utersuburban 'P'orterbrook |
| 4Lav | - | 'Lav'atory Stock |
| 4Pep | 445 | 'P'rototype 'E'lectro-'P'neumatic Brake Stock |
| 4Rep | 432 | 'R'estaurant 'E'lectro-'P'neumatic Brake Stock |
| 4Res | 404 | 'Res'taurant Stock |
| 4Sub | 405 | 'Sub'urban Stock |
| 4TC | 438 | 'T'railer 'C'ontrol Stock |
| 4Tep | 412 | 'T'emporary B'ep' Stock |
| 4Vec | 485 | 'Vec'tis (Isle of Wight) Stock |
| 4Veg | 427 | 'Ve'p 'G'atwick Express Stock |
| 4Vep | 423 | 'V'estibule 'E'lectro-'P'neumatic Brake Stock |
| 4Vip | 423 | 'V'ep 'I'ntermediate 'P'lan |
| 4Vop | 423 | 'V'ep 'O'pen-'P'lan |
| 5Bel | 403 | Brighton 'Bel'le Pullman Stock |
| 5Des | 444 | 'Des'iro |
| 5TCB | 438 | 'TC' and 'B'uffet Stock |
| 5Wes | 442 | 'Wes'sex Stock |
| 6Cit | - | 'Cit'y Express Stock |
| 6Pan | - | 'Pan'try Stock |
| 6Pul | - | 'Pul'lman Stock |
| 6Rep | 431 | 'R'eformed R'ep' Stock |
| 6TC | - | 'T'railer 'C'ontrol Stock |
| 7TC | - | 'T'railer 'C'ontrol Stock |
| 8Dig | 422 | 'D'edicated Br'ig'hton Stock |
| 8Gat | 460 | 'Gat'wick Express Stock |
| 8Mig | 421 | 'M'iniature Buffet and C'ig' Stock |
| 8Vab | 480 | 'V'estibule 'A'utobrake 'B'uffet Stock |
Diesel-electric multiple units
| SR Designation | BR Class | Meaning |
|---|---|---|
| 3D | 207 | Oxte'd' Line Stock |
| 3H | 205 | 'H'ampshire Stock |
| 3R | 206 | 'R'eading Line Stock |
| 3T | 204 | Hampshire and added 'T'railer Stock |
| 6B | 203 | Hastings 'B'uffet Stock |
| 6L | 202 | Hastings 'L'ong-bodied Stock |
| 6S | 201 | Hastings 'S'hort-bodied Stock |
See also
★ List of British Rail classes
★ British Rail brand names
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