Signal box prefix codes

A (hopefully) comprehensive listing

'Boxes beginning A

Last update 9 December 2008

To see the railway index, please click here ----->>.

Please select a starting letter from the links below:

Introduction A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Non-National Rail

Phil Deaves, Swindon, Wiltshire

- - c o n t a c t - m e - -

I am always grateful for additional information, whether entirely new records (particularly historical records), or information to fill in gaps or correct errors, via the email address above.  Thank you.

Code Signal Box Note ELR Mileage Opened Closed Control to
AF Abbey Foregate Junction   WSJ2 171m 13ch 1914    
AJ Abbey Junction   NWO 9m 64ch 1867? 16 February 1992 Nuneaton (NN)
R Repeater signals
AW Abbey Wood Reduced to gate box 25 October 1970 NKL   c1874 13 July 1975 Dartford (D)
  Aberbeeg Junction   EBW 14m 21ch 1892 1998  
  Abercwmboi   ABD 21m 22ch   9 October 1989 Abercynon (A/AB)
A Abercynon Aberdare branch CAM 16m 25ch 1932 30 May 2008 Abercynon (A)
AB Merthyr Tydfil branch
A Abercynon   CAM 16m 25ch 30 May 2008    
A Aberdeen Code used from 1981 ECN5 240m 63ch 21 June 1981    
A Aberdour Code used 1979 ECN2   1890 10 December 1979 Edinburgh (EU)
A Abergavenny   HNL1 22m 75ch 1934    
AY
AE Abergele   CNH3 213m 29ch 1902    
AW Aberthaw   VOG 5m 3ch 1897    
A Some signals shown on signal plan
A Abington Code used from 1972 WCM1 57m 77ch 20 September 1942 29 April 1973 Motherwell (MC)
A Acklington   ECM7 c28m 36ch   11 January 1964 Chevington (CN)
A Acle   NAY 10m 29ch 1883    
A Acton Formerly Acton West MLN1 4m 79ch 1 September 1932 24 February 1968 Old Oak Common (OO)
AB Acton Bridge Burnt down in 2000 CGJ1 172m 35ch     Winsford (WD)
ACW Acton Canal Wharf   CAW 8m 40ch 1895    
AG Acton Grange   CGJ2 c180m 12ch   16 September 1972 Warrington (WN)
AL Acton Lane   LLG 0m 30ch 1964 24 December 2000 Wembley (WM)
AM Acton Middle   MLN1 4m 25ch   31 January 1959? Acton (A)
AW Acton Wells Junction   BOK5 0m 65ch 1892    
AW Acton West   MLN1 c4m 65ch     Old Oak Common (OO)
AY Acton Yard   MLN1 4m 16ch 1 February 1959 after 1969 Old Oak Common (OO)
AC Addiscombe   EEA 12m 66ch 1899? 31 May 1997  
AD Addlestone Reduced to gate box 22 March 1970 VWW 20m 64ch by 1912 6 January 1974 Woking (WK)
AX Adwick Crossing   PED4 c14m 44ch     Sheffield (S)?
AJ Agecroft Junction   MVE1 3m 33ch November 1950 9 April 1988 Manchester Piccadilly (MP)
  Ainsdale   HXS3 14m 67ch 1878 11 March 1994 Merseyrail (ML)
AD Airdrie Code used from 1960 NEM2 10m 38ch 28 February 1960 28 July 1991 Yoker (YS)
AN Albion Converted to shunt frame 8 January 1966: line controlled by Birmingham New Street (NS) RBS2 6m 14ch     Birmingham New Street (NS)
A Aldam Junction Mileage accuracy unknown PED3 8m 78ch      
AS Aldershot Previously Aldershot 'A'? PAA1 34m 75ch c1900    
ASA Semi-automatic signals partially controlled from Ground Frame A
WAS Automatic signals (code not seen on site)
WA Automatic signals
GW Aldershot Junction North   PAA1 33m 40ch   23 August 1970 Aldershot (AS)
AJ Aldridge Junction   CBR2     May 1967? Walsall (WL)
A Aldwarke Also closed 25 February 1980 to September 1990 TJC3 c164m 46ch 7 March 1965 11 July 1992 Sheffield (S)
RA Repeater signals
AX Alexandria   BCH     11 March 1973 Yoker (YD)
AN Allerton Junction   WJL3 187m 66ch 8 August 1960    
AL Allington   NOG1 108m 72ch 3 October 2005    
AJ Allington Junction   NOG1 108m 71ch 1875 3 October 2005 Allington (AL)
A
U Alne Up line semi-automatic signals ECM5 c11m 14ch   15 May 1960 Pilmoor (P)
A Alnmouth Code from 1977 replacing all others.  'Box renamed from Alnmouth North 1957 ECM7 34m 76ch 1907    
AH Code used until 1977
D Down line automatic signals
U Up line automatic signals
  Alresford Station Gate box: line controlled by East Gate Junction (EG) COC 57m 68ch 1899 2 March 2009 (planned) Colchester (CO)
AS Alrewas   BJW3 22m 10ch 1899    
GA Alstone See Cheltenham Alstone
A Altofts Junction   TJC3     2 March 1990? Altofts Junction (AJ)
AJ Altofts Junction   TJC3 186m 0ch 3 March 1990 September 1997 Castleford (CD)
NOC 23m 57ch
  Altrincham   CDM1 7m 61ch   22 July 1991 Deansgate Junction (DJ)
AY Amberley   TBH1 54m 61ch 24 January 1934    
AR Ancaster   GRS2 114m 48ch c1873    
WFN Andover 'A'   BAE1 66m 11ch   2 December 1973 Basingstoke (YW)
WFO Andover 'B'   BAE1 66m 30ch   2 December 1973 Basingstoke (YW)
AR Angel Road   BGK     10 March 1969 Liverpool Street (L)
AG Angmering   BLI1 15m 48ch 1877 1988 Lancing (LG)
AN Annan Code used from 1973 GSW 107m 10ch 1876    
A Unclear if code carried
AN Annat Gate box from 6 December 1987: line controlled by Banavie (B).  Unclear if code actually carried MLG2 2m 15ch 21 June 1964    
ANT
A Apperley Junction   ILK1 202m 3ch 1927 4 July 1994 Leeds (L)
AJ
A Appleby (Lincolnshire)   DOW 26m 59ch 1885 24 February 2003 Appleby (Lincolnshire) [temporary panel]
AY Appleby (Lincolnshire) [temporary panel]   DOW 26m 58ch 24 February 2003 November 2004 Appleby (Lincolnshire) (AY)
AY Appleby (Lincolnshire) Reopened original 'box following rebuilding DOW 26m 59ch November 2004    
A Appleby North Original code SAC 277m 34ch 1951    
AN Later code, believed introduced 8 December 2008
AP Appledore   ATH 64m 46ch 27 June 1954 1993 Ashford IECC (AD)
AX Appleford Reduced to gate box, now demolished: line controlled by Swindon B (SB).  Signal plan states "Controlled and supervised by dedicated crossing controller's panel at Swindon SCC". DCL 54m 54ch 1952 17 May 1965 Swindon B (SB)
A Code also used at some stage
AH Arbroath Formerly Arbroath North.  Code used from 2002 ECN3 16m 59ch 26 March 1911    
ZE Archcliffe Junction Sometimes also known as Arch Junction (possibly in error) XTD 76m 42ch 1928 1998 Folkestone East (YE)
AE Ardmore East Code used from 1960 NEM7   24 January 1943 12 December 1976 Yoker (YC)
AW Ardmore West   NEM7   28 February 1943 4 November 1973 Yoker (YC)
A Arksey   ECM1 158m 2ch   26 October 1980 Doncaster (D)
A Arlesey   ECM1       Kings Cross (K)
AY Arley   NWO 4m 60ch   9 August 1969 Saltley (SY)
AE Armitage   LEC2 122m 9ch   12 June 2005? Colwich (CH)
AE Arnside Code used from 2008.
Plans made for Carnforth-Arnside, with all Carnforth boxes and line to Wennington closed, showed AE signals at Silverdale, believed never installed		 CBC1 6m 29ch 1897?    
AJ Arpley Junction   WOA1 0m 0ch 1918    
SDJ2 11m 3ch
AR Arundel   TBH1 58m 36ch 27 March 1938    
CBV Original code to 1979 when new panel installed
AJ Arundel Junction One signal only, for 16 days TBH1 59m 75ch 1938 8 December 1979 Arundel (AR)
TBH2 19m 1ch
BLI1 19m 1ch
AW Ascott under Wychwood   OWW 80m 37ch 1883    
AY Asfordby   GSM4 111m 40ch      
FW Ash Crossing   GTW2 49m 15ch 13 February 1966 30 October 1998 Guildford (GD)
WA Automatic signals
RWA Repeater to automatic signals
AS Ashburys   HAJ 1m 54ch 1906    
AE Ashburys East Same 'box as Ashburys?         Ashburys (AS)
NN Ashby Junction Temporary code until Ashby taken over by Nuneaton LEC2 97m 57ch     Nuneaton (NN)
UE Ashford   XTD 56m 23ch 29 April 1962 12 December 1995 Ashford IECC (AD)
A Automatic signals
D Distant signals
AF Ashford Centre CTRL control centre, located within Ashford IECC XTD 56m 21ch 2003    
D Down line automatic signals and stop/proceed markers
DC Automatic signals and stop/proceed markers on Stratford International-Temple Mills connecting line
DW Automatic signals and stop/proceed markers on Down Waterloo connection
U Up line automatic signals and stop/proceed markers
UW Automatic signals and stop/proceed markers on Up Waterloo connection
AD Ashford IECC   XTD 56m 21ch February 1993    
A Automatic signals
(existance of code in doubt)
R Banner repeater signals
NK North Kent area (VDU based control & indication system) 2000 (completed 2001)
WBL Ashford [Middx/Surrey]   RDG1 17m 48ch 23 February 1930 8 September 1974 Feltham (F)
A Ashington Junction Code not confirmed BWC 3m 4ch 1896    
A Ashley Hill Unclear if code used BSW 2m 61ch 5 July 1925 17 October 1970 Bristol (B)
CBG Ashtead   BTH3 16m 13ch   1978 Leatherhead (CBH)
AJ Ashton Junction (Bristol) Code used from 6 December 1971.  Out of use from 1990; destroyed by fire 1994 POD 121m 19ch 20 May 1906 1994 Bristol (B)
AM Ashton Moss North Junction Code not carried MVL1 5m 52ch 1911    
AMJ 0m 29ch
AMS Ashton Moss South Junction   DJO2 1m 29ch 1911   Ashton Moss North Junction (AM)
HW Ash Vale Junction   AAV 40m 48ch 1879    
WA Automatic signals
  Ashwell   GSM2 96m 66ch 30 June 1912    
AM Askam   CBC1 35m 3ch 1890    
  Aspatria   CBC2 7m 74ch 1891 January 1998 Maryport Station (MS)
  Aspley Guise   BBM 5m 4ch   6 September 2004 Marston Vale (MV)
AY Astley Possibly replaced by a 1972 'box DSE 22m 55ch 1872    
AN Aston   PBJ 0m 37ch 12 October 1992 (in 1957 building)    
AN Aston No 1   PBJ c1m 55ch   2 July 1966 Birmingham New Street (NS)
AE Atherstone   LEC2 102m 23ch 10 November 1962 1991 Nuneaton (NN)
  Atherton Goods Yard   WBS1 11m 18ch 1956    
AH Attenborough Station   TSN1 c121m 69ch   19 December 1969 Trent (TT)
A Attleborough   ETN 108m 20ch 1883    
AB
AR Auchterarder Code used from 2002 SCM4 137m 41ch 11 October 1895    
AU Code reported but probably not used
  Aughton Road   HXS3 17m 49ch 1928 11 March 1994 Merseyrail (ML)
AS Avenue Sidings   SPC9       Trent (TT)
A Aviemore Original code to 2002 HGL2 83m 51ch 16 June 1898    
AV Aviemore area. Code was A to 2002
AC Carrbridge interlocking.  Code used from 1979
AK Kincraig interlocking.  Code used from 1979
AM Moy interlocking.  Code used from 1979
AS Slochd interlocking.  Code used from 1979
AT Tomatin interlocking.  Code used from 1980
AD Avonmouth Dock Junction   CNX 8m 28ch 24 July 1906 22 January 1988 St Andrews Junction (SA)
AJ Awre (Junction) Apparently still extant and able to be used in emergencies SWM2 128m 22ch 1909 31 May 1969? Gloucester (G)
WDG Axe Gates   BAE2   1949   Chard Junction (CJ)
A Axminster Crossing Gate box: line controlled by Chard Junction (CJ).  Crossing controlled from station building (original gate box now out of use) BAE2 144m 41ch 16 December 1973    
  Aylesbury   MCJ2 38m 2ch 1905? 1990? Marylebone (ME)
AF Aylesford   PWS2 38m 75ch 1921    
AJ Aynho Junction   DCL 81m 3ch 4 April 1910 5 March 1992 Banbury South (BS)
PA Ayr Local Signalling Panel See Paisley Ayr interlocking AYR6 39m 73ch 7 April 1985 1 June 1986 Paisley (PA) (local control still possible)

Introduction A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Non-National Rail

 

Site Counter visits to the Signalling pages since 5th February 2007
Bpath Counter