Signal box prefix codes

A (hopefully) comprehensive listing

'Boxes beginning S

Last update 23 July 2024

Additional information is always gratefully received, whether entirely new records (particularly historical records) or information to fill in gaps or correct errors, via the contact link under the Miscellaneous entry in the navigation bar above. Thank you.

Please select a starting letter from the links below:

Code Signal Box Note ELRMileage Opened Closed Control to
SA St Albans SPC119m 64ch 1892 early on 2 December 1979 West Hampstead (WH)
SA St Andrews Junction [Bristol] AMB15m 79ch 9 May 1910
Z Creep signals at Bristol Bulk Handling Terminal
SA St Andrews Junction [West Midlands] SKN41m 19ch Saltley (SY)
SA St Annes KBS116m 71ch 20 November 1983✖delayed from 2 October 1983 Kirkham North Junction (KM)
St Austell MLN3286m 34ch 1905 22 March 1980 Burngullow (B)
SA St Austell Ground Frame Line controlled by Par (PR) MLN3286m 23ch 22 March 1980
SB St Bees Believed code not carried CBC170m 22ch 21 February 1891
SB St Blazey NEW282m 19ch 25 June 1908
B St Botolphs STB53m 68ch by 1884 17 July 1983 East Gate Junction (EG)
WDN St Denys BML177m 12ch March 1899 11 October 1981 Eastleigh [new] (E)
SN Code used in final years
WA Automatic signals
SD St Dunstans Unclear if code carried LBE4191m 71ch August 1877 4 December 1972 Mill Lane Junction (M)
SE St Enoch Code used from opening SSR0m 14ch 14 May 1933 26 November 1967 High Street Junction (HS) in part; closed remainder
SE St Erth MLN4320m 67ch 10 September 1899
SF St Fagans Code used before downgrading to gate box 23 April 1966: line controlled by Cardiff (C) SWM2174m 34ch June 1889 24 December 2016✖last train; official closure 29 December 2016 Wales Rail Operating Centre (CF)
SG St Germains Downgraded to gate box 20 November 1977 ECM811m 52ch 29 September 1985 Edinburgh (EA)
SG St Germans MLN2256m 23ch 6 May 1973 25 April 1998 Plymouth (P)
SH St Helens Station SBH25m 20ch 1891
SJB St James Bridge LEN3100m 23ch 17 July 1965 Gateshead (G)
SD St James Deeping WEB83m 29ch 16 March 1876 3 November 2014✖delayed from 3 March 2014 Lincoln Control Centre (WS)
SJ At least one signal
JD Small number of signals
S St James Junction PED522m 39ch 3 February 1895 9 July 1979 Doncaster (D)
SJ
L St Johns XTD5m 54ch 30 June 1929 8 February 1976 London Bridge (L)
A Automatic signals
J St Johns [Glasgow] Code possibly not carried on signals HST0m 46ch 1 April 1893 26 November 1967 High Street Junction (HS)
SL St Leonards West Marina WJB32m 56ch 1 June 1889 2 June 1997 Bo Peep Junction (BJ)
WBH St Margarets RDG110m 61ch 1882 10 November 1974 Feltham (F)
SM St Margarets [Herts] Codes used from 17 January 1960 HEB20m 23ch 1887 27 May 2003 Liverpool Street [new] (L)
RSM Repeater signals
U Up line automatic signals
St Marys Downgraded to gate box 5 October 1970: line controlled by Gloucester (G) SWM198m 65ch ≈1870
SMG St Mary's Goods Yard 3m 16ch April 1938 20 April 1980 Derby (DY)
SN St Neots ECM151m 37ch 20 April 1898 10 December 1977 Peterborough (P)
DF Down fast line automatic signals
SP St Pancras SPC10m 14ch 3 July 1982 West Hampstead (WH)
D Down line automatic signals
PM St Philips Marsh Depot [panel 1] BRL 2 August 1991 15 August 2015 St Philips Marsh Depot [panel 3] (PM)
PM St Philips Marsh Depot [panel 2] BRL 3 December 2006 15 August 2015 St Philips Marsh Depot [panel 3] (PM)
PM St Philips Marsh Depot [panel 3] BRL 15 August 2015
CQ Salfords VTB323m 58ch 1907 27 April 1975 Earlswood (CR)
SY Salisbury BAE183m 38ch 17 August 1981
RWA Repeater to automatic signals
WA Automatic signals
WFQ Salisbury Tunnel Junction Code used from 23 April 1968 BAE182m 34ch ≈1865 17 August 1981 Salisbury (SY)
DWFQ Distant signals
SY Temporary code until area taken over by Salisbury
BS Salisbury West Unclear if code carried on signals BAE183m 61ch 2 November 1902 21 August 1981 Salisbury (SY)
SG Salop Goods Junction LLI157m 71ch 26 March 1901
Salthouse Junction CBC127m 57ch DLB27m 57ch 1898 6 September 1992 Barrow in Furness (BF)
SY Saltley Demolished February 2022 DBP340m 38ch 11 August 1969 7 November 2016 West Midlands Signalling Centre (BA, BB, LJ, WM)
BB Barnt Green-Redditch branch signals. Code used from 1 September 2014
SYR Distant signal (seen at University)
S Saltmarshe TJG23m 49ch 1905 23 November 2018✖last train; official closure 26 November 2018, delayed from 3 April 2018 York Rail Operating Centre (TG)
SA 'Official' code, not seen on site
D Down direction automatic signals
U Up direction automatic signals
SK Salwick Demolished 19 December 2017 PBN5m 03ch 1889 10 November 2017✖last train; official closure 29 January 2018 Manchester Rail Operating Centre (BL)
PX Sampford Peverell Pugham Crossing signals MLN1177m 32ch 14 February 1932 10 March 1968 Tiverton Junction (TJ)
SH Sandbach CMP1162m 61ch 5 June 1959 11 December 2005✖last train; official closure 11 March 2006 Manchester South (MS)
RSH Repeater signals
SJ Sandbach Junction CDM2≈20m 74ch Greenbank (GK)
Sanderstead SCU112m 15ch 10 March 1884 2 November 1985 Three Bridges [new] (T)
Sandhills See Merseyrail (ML)
SN Sandown Downgraded to ground frame 25 November 1988 IOW6m 41ch 1893 25 March 1989 Ryde St Johns Road (WFP)
SW Sandwich BME286m 38ch 30 January 1938
S Sandy Named Sandy South to 1927 ECM143m 70ch 6 November 1893 10 December 1977 Peterborough (P)
ST Sandycroft Closed after being switched out for many years CNH3184m 73ch 1900 24 January 2005 Chester PSB (CR)
Sandy South See Sandy
S Santon DOW 4 July 1910 31 March 1973 Scunthorpe (S)
U Saughton Junction Up direction automatic signals. Named Corstorphine Junction to 31 January 1902 EGM143m 74ch 1894 15 December 1975 Haymarket [temporary panel] (EH)
SW Sawbridgeworth BGK26m 53ch 1882 24 February 1985 Harlow Mill (HA)
D Down line automatic signals
RD Repeaters to down line automatic signals
RSW Repeaters to controlled signals
U Up line automatic signals
Saxby Junction Closed after being switched out for many years GSM2101m 53ch 1892 6 February 2005 Whissendine (WH)
SY Saxilby Up signals SPD388m 42ch 25 June 1939 3 January 2014✖delayed from 10 June 2013 Lincoln Control Centre (LG)
S Down signals
SM Saxmundham Original code used to 23 October 2012 ESK91m 05ch 1881
ES Code used from 23 October 2012
BS Beccles section boards. Code used to 23 October 2012
HH Halesworth fixed distant boards. Code used to 23 October 2012
HW Halesworth section boards. Code used to 23 October 2012
OB Oulton Broad South section boards. Code used to 23 October 2012
SB Saxmundham stop boards. Code used to 23 October 2012
SX Saxmundham section boards. Code used to 23 October 2012
WB Woodbridge section boards. Code used to 23 October 2012
WBDD Woodbridge fixed distant boards. Code used to 23 October 2012
WBDDX Woodbridge fixed distant boards (reverse direction working). Code used to 23 October 2012
WF Westerfield. Code used to 23 October 2012
WFD Westerfield fixed distant boards. Code used to 23 October 2012
WFS Westerfield stop boards. Code used to 23 October 2012
WSF Westerfield section boards. Code used to 23 October 2012
S Scopwick Code carried by at least one signal SPD270m 49ch 1937 30 April 1989 Scopwick [temporary gate box] (SL)
SK Unclear whether code used
S Scopwick [temporary gate box] Code carried by at least one signal SPD270m 49ch 30 April 1989 22 July 1990 Scopwick [reopened] (SL)
SK Unclear whether code used
S Scopwick [reopened] Code carried by at least one signal SPD270m 49ch 22 July 1990 4 April 2014✖delayed from 23 September 2013 Lincoln Control Centre (SL)
SK Unclear whether code used
SD Scotswood Code used from 6 February 1966 BES2m 69ch 27 February 1983 Newcastle (N)
D Down line automatic signals
RD Banner repeaters to down line automatic signals
U Up line automatic signals
SG Scout Green Code used from 1 April 1973 CGJ735m 12ch 14 April 1973 Carlisle (CE)
SN Scremerston Code used from 10 April 1960 ECM763m 46ch 15 March 1981 Tweedmouth (T)
D Down line automatic signals
U Up line automatic signals
SN Scropton NSS22m 53ch ≈1886
S Scunthorpe DOW23m 27ch 1 April 1973
S Scunthorpe & Frodingham DOW22m 50ch 11 March 1928 1 April 1973 Scunthorpe (S)
B Scunthorpe BSC Coal Handling Plant DOW≈24m 30ch
BSC Scunthorpe BSC Terminal SAN0m 69ch
H Scunthorpe Hump Draw ahead signals DOW23m 70ch ≈23 April 1972
RH Approach to draw ahead signals
RRH Approach to draw ahead signals
RRRH Approach to draw ahead signals
A Seabanks Codes possibly used with ground position light signals SEA1 25 July 1987 Dawdon (DN)
B
Seacroft Downgraded to gate box 19 December 1967: line controlled by Skegness (S) GRS48m 02ch September 1899 29 April 1990 Skegness (S)
SF Seaford Permanently switched out June 1996 STS58m 63ch 1895 18 January 2002 Newhaven Harbour (NH)
S Seaham At least one signal. Downgraded to gate box 15 November 2010: line controlled by Ryhope Grange (NS) LEN384m 44ch 1905 13 September 2013✖last train; official closure 2 February 2014, delayed from 25 June 2011 Ryhope Grange (NS)
BC Seaham Colliery [British Coal] 14 December 1986 Colliery closed
SE Seamer East YMS39m 17ch 1910 9 April 2000 Seamer [temporary panel] (SR)
E Earlier code used from 1984
SR Seamer [temporary panel] YMS39m 18ch 9 April 2000 5 November 2000 Seamer [reopened] (SR)
SR Seamer [reopened] YMS39m 17ch 5 November 2000
YS York to Scarborough section. Code used from 1 November 2010
SW Seamer West HBS50m 43ch YMS38m 63ch 1906 9 April 2000 Seamer [temporary panel] (SR)
D Down line automatic distant signals
S Selby Named Selby South to 1972. Code used from renaming. Temporary panel fitted 1972 HUL131m 10ch 29 April 1973 Selby Panel (S)
SS Code used when named Selby South
SC Selby Canal TCW1173m 50ch 9 April 1972 Selby South (S)
SD Selby D Ground Frame Named Selby Dock Ground Frame to 1972 Selby Panel (S)
Selby Dock Ground Frame See Selby D Ground Frame
C Selby Mine NCB Control Room Stone Bunker line signals HUL3≈5m 60ch Sidings closed
B Draw ahead signals
D Draw ahead signals
S Siding signals
also had draw-ahead signals in colliery sidings lettered SA to SF, letters arranged vertically, with no number
SN Selby North Code not certain 18 April 1971 Selby South (SS)
S Selby Panel Named Selby West until 29 April 1973 when panel transferred from Selby South HUL30m 40ch 1870
U Up line automatic signals
Selby South See Selby
- Selby Swing Bridge HUL230m 70ch 1891
Selby West See Selby Panel
S Selhurst Depot [temporary] LBW9m 00ch 13 May 1984 22 March 1985 Selhurst Depot [permanent] (S)
SUY Depot shed protection signals
S Selhurst Depot [permanent] LBW9m 00ch 23 March 1985
SUY Depot shed protection signals. Code used until September 2003
SUZ Depot shed protection signals. Code used from September 2003
SJ Selhurst Junction VTB19m 44ch 6 July 1903 21 March 1954 Gloucester Road Junction (CY)
CA Automatic signals
SD Sellafield CBC163m 76ch 1918
S Unclear whether code used
SG Selling Out of use since damaged by fire. Now preserved at Eythorne (East Kent Light Railway) FDM55m 21ch ≈1870 July 1995 Faversham (EY)
SO Selly Oak Downgraded to ground frame 6 September 1969 BAG145m 62ch 1957 12 August 1973 Saltley (SY)
SN Selsdon WDS14m 44ch 10 March 1884 1 April 1984 Three Bridges [new] (T)
GF SERC Ground Frame AMB12m 70ch 25 April 2016✖delayed from 10 April 2016
Sessay Wood See Pilmoor
D Sessay Wood Down direction signals ECM5≈18m 00ch 12 March 1933 York [PSB] (Y)
U Up direction signals
SJ Settle Junction SKW1234m 42ch 14 September 1913
SK Seven Kings LTN1≈8m 30ch 1 March 1899 7 August 1949 Liverpool Street (L)
NE Sevenoaks Code used from opening XTD21m 76ch 4 March 1962 28 June 1993 Ashford IECC (AD)
A Automatic signals
Sevenoaks Bat & Ball See Bat & Ball
SS Seven Sisters Junction HDT5m 40ch 1905 26 November 2001 Liverpool Street [new] (L)
D Down line automatic signals
U Up line automatic signals
SBJ Severn Bridge Junction WSJ2171m 33ch June 1903
Severn Tunnel East SWM2148m 42ch 2 June 1942 5 July 1969 Newport (N)
DH Severn Tunnel Junction Down Hump Yard SWM2148m 62ch 1 October 1939 4 December 1982 Newport (J)
TW Severn Tunnel West Code used from 1 November 1968 BSW15m 50ch ≈1901 5 July 1969 Newport (N)
SE Seymour Junction Temporarily closed 31 July 1982 to 15 August 1982 BAC2152m 21ch 1963 Disused since 2006 still in sectional appendix in 2018
SH Shaftholme Also called Shaftholme Junction ECM2160m 15ch February 1958 26 October 1980 Doncaster (D)
Shaftholme Junction See Shaftholme
WY Shalford RSJ40m 78ch 28 February 1954 30 December 1998 Guildford Area Signalling Centre (GD)
SQ Shap Quarry Code used from 18 March 1973 CGJ7≈37m 68ch 8 April 1962 31 March 1973 Carlisle (CE)
Sharlston Colliery Had draw-ahead signals in colliery sidings lettered A to D, with no number
SK Sharnbrook SPC256m 46ch 1 August 1981✖delayed from 16 May 1981 West Hampstead (WH)
SK Sharnbrook [temporary] SPC2≈56m 55ch 25 October 1987 5 November 1987 West Hampstead (WH)
S Shawfield WCM299m 49ch 8 April 1973 Glasgow Central (G)
SW Shaw Station MPR310m 05ch ≈1925 3 October 2009
S Sheffield TJC1158m 29ch 20 January 1973 1 May 2016 York Rail Operating Centre (S, SA)
D At least one shunt signal at Roundwood
GF Ground frame-controlled signals
N At least one shunt signal near Aldwarke
SA Aldwarke area signals
SN Sheffield North Junction TJC1≈158m 54ch 20 January 1973 Sheffield (S)
SS Sheffield South Junction TJC1≈158m 32ch 20 January 1973 Sheffield (S)
S1 Sheffield [Victoria] No 1 MAC340m 40ch March 1908 25 March 1979 Line closed
S
S2 Sheffield [Victoria] No 2 MAC340m 73ch 6 March 1908 15 November 1967 Line closed
S3 Sheffield [Victoria] No 3 MAC341m 22ch 1953 29 October 1983 Sheffield [Victoria] No 4 (S4)
S4 Sheffield [Victoria] No 4 MAC341m 39ch ≈1902 14 September 1986 Woodburn Junction (WJ)
RS4 Banner repeater signals
S5 Sheffield [Victoria] No 5 Downgraded to ground frame 3 October 1965 MAC341m 56ch ≈1902 after 1980 Woodburn Junction (WJ)
S6 Sheffield [Victoria] No 6 Downgraded to ground frame 3 October 1965 MAC342m 00ch 15 June 1941 Woodburn Junction (WJ)
S Shelford BGK52m 34ch by July 1883 10 September 1983 Cambridge (CA)
S Shenfield LTN120m 09ch ≈ December 1933 17 May 1981 Shenfield [new] (S)
DL Down Southend loop automatic signals
DS Down Southend line automatic signals
RDS Distant to down Southend line automatic signals
RS Distant signals
RUS Distant to up Southend line automatic signals
UE Up electric line automatic signals
US Up Southend line automatic signals
S Shenfield [new] LTN120m 16ch 17 May 1981 30 August 1993 Liverpool Street [new] (L)
DM Down main line automatic signals
UE Up electric line automatic signals
SL Shepcote Lane BTJ≈161m 15ch 7 December 1964 8 November 1992 Woodburn Junction (WJ)
SL Shepcote Lane Junction BTJ161m 13ch 12 November 1992 Woodburn Junction (W)
ED Shepherds Lane ATL5m 49ch VIR2m 76ch 8 March 1959 29 November 1981 Victoria Signalling Centre (VS)
SH Shepherds Well FDM71m 52ch 1878 24 December 2011 East Kent Signalling Centre (EK)
S Shepreth SBR49m 58ch 1 January 1878 26 February 1983 Cambridge (CA)
SBJ Shepreth Branch Junction BGK53m 06ch SBR55m 26ch by 1893 26 February 1983 Cambridge (CA)
SB Code shown in August 1973 weekly notice
Sherborne BAE2118m 00ch 18 December 1960 4 January 1970 Sherborne [gate box]
Sherborne [gate box] Gate box within station building: line controlled by Yeovil Junction (YJ) BAE2118m 04ch 4 January 1970 27 February 2012 Basingstoke Signalling Control Centre (SE)
SN Sherburn in Elmet North NOC12m 70ch 10 October 1982 Milford (M)
S Sherburn in Elmet South NOC12m 38ch 10 October 1982 Milford (M)
SS
SSX Sherwood Colliery Sidings South Ground Frame Set back signals Near Shirebrook PSE? 24 January 1988
SH Shettleston Code used from 1960 NEM23m 30ch 31 July 1904 28 July 1991 Yoker (YS)
S Shields Junction No 1 Code used from 1966 AYR11m 08ch 6 August 1894 2 April 1967 Glasgow Central (G)
S Shildon Named Shildon South to ≈2 September 1967 DAE18m 26ch 1887
N Shildon North [new] DAE1 1960s June 1986? Shildon (S)
SN Shildon North DAE1 2 September 1967? Shildon North [new] (N)?
Shildon South See Shildon
BJ Shipley Bingley Junction TJC3205m 76ch 1907 25 July 1994 Leeds (L)
B Code believed used at some stage
BR Shipley Bradford Junction BIB0m 00ch SBF206m 01ch 1907 25 July 1994 Leeds (L)
B
Shipley Guisley Junction See Guisley Junction
LJ Shipley Leeds Junction TJC3205m 63ch 20 July 1975 Guisley Junction (G)
SH Shippea Hill Code in use by 1980 ETN77m 26ch 1883 20 August 2012✖delayed from 25 June 2012 Cambridge (EN)
SJ Shirebrook Junction PSE145m 14ch 1 January 1899
NX One former Elmton & Cresswell signal. Code used from 22 July 2024
Shirebrook Sidings Replaced 'box destroyed by fire 27 June 1971 PSE144m 07ch 2 June 1996 Kirkby Summit (KS)
Shirebrook Station PSE144m 79ch 1890 17 January 1998 Shirebrook Junction (SJ)
Shirehampton CNX7m 48ch 13 August 1905 17 October 1970 Bristol (B)
SS Shireoaks Formerly named Shireoaks Station. Still available for emergency level crossing control. Code used from December 1979 MAC354m 56ch 1874 13 December 1997 Worksop (WP)
B Shireoaks Colliery Bunker line MAC3≈54m 68ch 4 April 1982? Colliery closed
R Repeater signals
also had 'draw ahead' signals labelled A-F with no number
SE Shireoaks East Junction Code used from December 1979 MAC355m 62ch 23 November 1914 6 December 1997 Worksop (WP)
Shireoaks Station See Shireoaks
SH Shirley TSB3m 66ch 9 December 1907 1 November 2010 West Midlands Signalling Centre (TB)
SH Shoeburyness FSS339m 23ch 9 July 1995 Upminster IECC (UR)
R Banner repeater signals
SW Shoeburyness West Shunter's Control Panel FSS3 9 July 1995 Upminster IECC (UR)
CCG Shoreham By Sea A BLI15m 48ch 1902 14 May 1988 Lancing (LG)
CCE Shoreham By Sea B BLI15m 71ch 1877 14 May 1988 Lancing (LG)
Shoreham [Kent] SBJ22m 52ch by 1887 21 February 1971 Victoria Signalling Centre (VS)
EH Shortlands Junction VIR9m 56ch 31 May 1959 19 June 1982 Victoria Signalling Centre (VS)
S Shunters Bothy (Corkerhill CSMD) Code used from 1984 CNL≈3m 11ch ZZB2≈3m 11ch 19 August 1984
S Sibsey GRS3112m 07ch October 1888
SY
X Sidcup HDR12m 00ch 11 June 1894 8 November 1970 Dartford (D)
A Automatic signals
S Sighthill Junction Code used from 1960 SGN0m 61ch 28 November 1886 25 December 1998 Cowlairs [new] (CC)
ST Silecroft CBC148m 12ch 1923
SM Silk Mill Crossing MLN1164m 35ch 14 July 1940 21 March 1987 Exeter (E)
Silverhill Colliery Had draw-ahead signals in colliery sidings lettered A to H, with no number ?
B Silverwood Colliery [Thrybergh area] Unclear whether this was also known as Silverwood Junction, if so downgraded to ground frame 23 March 1975 ?
SB Sincil Bank SPD382m 19ch July 1882 29 January 1984 Pelham Street (PS)
SG Singer Code used from 1959 NEM58m 53ch 7 November 1907 2 July 1989 Yoker (YY)
Singleton PBN12m 32ch 1879 14 December 1997 Poulton No 3 (PT)
EV Sittingbourne VIR44m 73ch 24 May 1959 3 April 2015 in part 29 March 2016 remainder East Kent Signalling Centre (EK, EV)
A Automatic signals
S Skegness Code probably not carried on signals GRS49m 05ch May 1882
S Skellow Also known as Skellow Junction. Code used from 8 March 1970 CJS160m 59ch SKA0m 61ch 13 March 1916 16 August 1981 Doncaster (DS)
Skellow Junction See Skellow
SJ Skelton Junction WJP130m 09ch 26 January 1902 10 September 1981 Skelton Junction [temporary] (SJ)
SJ Skelton Junction [temporary] Temporary box whilst permanent structure repaired WJP1≈30m 09ch 11 September 1981 6 March 1982 Skelton Junction [reopened] (DJ)
SJ Skelton Junction [reopened] WJP130m 09ch 7 March 1982 7 July 1991✖full replacement signalling into use 22 July 1991 Deansgate Junction (DJ)
S Skelton Junction [York] Code used from opening ECM51m 50ch 8 June 1941 11 May 1989 York [IECC] (Y)
SJ Code used by 1988
U Up line automatic signals. Code used from opening until 13 March 1977. Slow lines have suffix S
UF Up fast line automatic signals. Code used from 13 March 1977 until 1980s
US Up slow line automatic signals. Code used from 13 March 1977 until 1980s
SW Skew Bridge CGJ5≈20m 45ch 3 February 1973 Preston (PN)
SK Skiers Spring SHB167m 66ch 1990 10 April 1998 Barnsley (BY)
Skipton Station North TJC3221m 33ch 1915 22 October 1994 Leeds (L)
Skipton Station South TJC3221m 13ch 1906 22 October 1994 Leeds (L)
SG Slade Green Control Room Depot control panel NKL15m 60ch 14 December 1992
DE Berthing shed protection signals
LE Berthing shed protection signals
SL Slade Lane CMP2 12 December 1959 Manchester London Road (LR)
S Slateford Junction Code used from 1960. Site of box reused for Slateford Signalling School ECA399m 19ch 18 December 1960 17 August 1981 Edinburgh (ES)
SJ Unclear whether code carried
SE Sleaford East GRS2120m 57ch 1882
SN Sleaford North Code carried by at least one signal SPD263m 47ch 6 March 1882 4 April 2014✖delayed from 30 December 2013 Lincoln Control Centre (SL)
D Sleaford South Down direction automatic signals SPD262m 13ch 6 March 1882 30 December 1957 Sleaford South [new] (SS)
SS Sleaford South [new] Code carried by most but not all signals SPD262m 15ch 30 December 1957 4 April 2014✖delayed from 30 December 2013 Lincoln Control Centre (WS)
SW Sleaford West GRS2120m 33ch February 1882
SE Sleights East 'Box preserved at Embsay PBS1134m 76ch 3 April 1892 6 August 2007 East Midlands Control Centre (PK)
S Slough MLN118m 44ch 14 October 1963 3 April 2015✖delayed from 25 December 2013 Thames Valley Signalling Centre (T)
C Colnbrook area stop boards
DM Down main line automatic signals
ES Windsor branch emergency stop signals. Code used from 17 March 1988. Signals out of use from 23 January 1995, still present 20 years later
UM Up main line automatic signals
Z Draw ahead signals at Hayes
SN Slough New IECC MLN118m 45ch 22 October 1992 27 December 2011 Thames Valley Signalling Centre (SN)
SW Slough West MLN118m 68ch SLO0m 01ch 1903 14 October 1963 Slough (S)
UM Up main line automatic signals
UR Up relief line automatic signals
SH Small Heath No 1 Formerly named Small Heath North DCL127m 14ch 24 July 1910 22 July 1973 Saltley (SY)
Small Heath North See Small Heath No 1
SD Smeafield Code used from 10 April 1960 ECM754m 79ch 9 December 1973 Belford (BD)
D Down direction automatic signals
U Up direction automatic signals
Smethwick Junction GSJ14m 05ch ≈December 1902 June 1964 Smethwick Junction [reopened] (SW)
SW Smethwick Junction [reopened] Believed code used in preparation for transferring control to Stourbridge Junction GSJ14m 05ch 17 April 1966 11 August 1990 Stourbridge Junction (SJ)
SB Smithy Bridge Downgraded to gate box 28 August 2011: line controlled by Rochdale West (TH) MVN212m 66ch 1907 19 January 2014 Rochdale West (TH)
S Snaith Gate box WAG168m 10ch 14 June 1986 Goole (G)
SR Snaith Road Gate box WAG170m 17ch 14 June 1986 Goole (G)
SF Sneinton Downgraded to gate box 7 December 1969: line controlled by Trent (TT) NOB10m 34ch 26 July 1914 20 July 2013 East Midlands Control Centre (NN)
Snelland NOB332m 15ch 1890 4 November 1989 Wickenby (W)
EDM Snodland PWS236m 65ch ≈1870 24 June 2013✖delayed from March 2013 Aylesford (AF)
SC Snowdown Colliery Closed after being switched out for many years (possibly 1997) FDM69m 73ch 22 March 1953 28 February 2005 Shepherds Well (SH)
SE Snydale TJC3183m 09ch? Line closed?
Soham SOB27m 61ch 1878 4 May 1992 Cambridge (CA)
SD Soho Depot RBS2
EP Sole Street VIR26m 69ch by 1887 16 July 1972 Rochester (ER)
A Automatic signals
SB Somerleyton Swing Bridge Downgraded to bridge box and renamed Somerleyton Swing Bridge Operations Cabin 24 February 2020: line controlled by Colchester [new] (YL) NOL17m 72ch 1904
EJ Southall East Junction MLN18m 58ch 1899 11 May 1968 Old Oak Common [new panel] (OO)
ES Southall East Station Code used by 1955 MLN19m 01ch February 1899 11 May 1968 Old Oak Common [new panel] (OO)
WJ Southall West Junction MLN19m 57ch 1872 11 May 1968 Old Oak Common [new panel] (OO)
WS Southall West Station MLN19m 15ch February 1899 11 May 1968 Old Oak Common [new panel] (OO)
WDS Southampton Central BML279m 28ch 2 June 1935 8 November 1981 Eastleigh [new] (E)
WFO Southampton Tunnel Junction BML278m 28ch ≈1861 2 October 1966 Northam Junction (WDQ)
CCT Southbourne TBH234m 19ch 15 February 1928 26 September 1992 Chichester (CC)
D Southbury Sidings Ground Frame HDT Liverpool Street [new] (L)
U
S Southcote Junction BHL37m 68ch BKE37m 68ch November 1895 24 April 1965 Reading (R)
UW Up Westbury line automatic signals
CV South Croydon VTB211m 37ch 8 May 1955 1 April 1984 Three Bridges [new] (T)
SC Southend Central FSS235m 47ch 1932 9 July 1995 Upminster IECC (UR)
SE Southend East FSS236m 10ch Upminster IECC (UR)
S Southend Victoria SSV41m 25ch 1889 1 September 1992 Liverpool Street [new] (L)
SD Earlier code
SJ Southerham Junction KJE251m 11ch KJE39m 11ch 1874 18 September 1976 Lewes (LW)
DSJ Distant signals
G South Gosforth Tyne & Wear Metro control centre. Code applied to certain signals 1980-1989 when shared running occurred -0.125km 18 May 1980
SG South Gosforth Formerly named South Gosforth East. Codes used from 1965. Some automatic signals also had suffix X BTN?2m 48ch? still open 10 April 1978 Line transferred to Metro
D Down line automatic signals
DB Down Benton line automatic signals
SGE Code used 1964-1965 when named South Gosforth East
U Up line automatic signals
South Gosforth East See South Gosforth
SH South Hampstead CWJ2m 18ch 10 December 1988 Willesden Suburban (WS)
South Harrow See Sudbury Hill, Harrow
SK South Kenton CWJ9m 26ch 10 December 1988 Willesden Suburban (WS)
South Kirkby See South Kirkby Junction
C South Kirkby Colliery SKB Line closed
DH Discharge Hopper signals
also had draw-ahead signals in colliery sidings lettered LA to LC (line B) and DD to DG (discharge hopper line), with no number
SK South Kirkby Junction Also known as South Kirkby. Code used from November 1970 DOL1≈165m 74ch 22 May 1971 Leeds (L)
SL South Liberty Junction Code used by 13 December 1953 MLN1121m 08ch July 1892 4 December 1971 Bristol (B)
S South Pelaw Tyneside (T)?
SP
ST Southport Station HXS318m 21ch WBS335m 15ch 1917 20 March 1994 Merseyrail (ML)
SS South Shields Code used by 1963 31 March 1968 Harton (H)
S South Tottenham Station Junction Panel fitted 2 November 2009 TAH15m 71ch 1 July 1894
South Wales Control Centre See Wales Rail Operating Centre
SW South West Sidings Shunt frame Willesden New (WN)?
SG Spalding Formerly named Spalding No 1 SPD144m 21ch 11 September 1921 3 November 2014✖delayed from 3 March 2014 Lincoln Control Centre (WS)
S Original code
Spalding No 1 See Spalding
Speeton Downgraded to gate box 1 January 1973 HBS37m 34ch 12 December 1988 Bridlington Quay (BQ)
SE Speke Junction WJL3187m 15ch 1907 24 December 2018✖last train; official closure 2 January 2019 Manchester Rail Operating Centre (WE)
Speke Sidings Ground Frame No 1 WJL3 2 January 2019
Spelbrook See Spellbrook
SP Spellbrook Name board has 'Spelbrook' BGK28m 19ch 1898 29 October 2003 Liverpool Street [new] (L)
D Down line automatic signals
RD Repeater to down line automatic signals
U Up line automatic signals
SB Spital Bridge ECM1≈76m 52ch Peterborough (P)
SJ Spital Junction ECM175m 50ch 3 May 1873 2 December 1972 Peterborough (P)
SY Spital Yard ECM1≈76m 60ch Peterborough (P)
Spittal Gate box: line controlled by Tweedmouth (TW) ECM765m 01ch
SS Spondon Station Downgraded to shunt frame SPC6125m 74ch 26 May 1918 19 December 1988 Derby (DY)
SL Spon Lane Downgraded to shunt frame 8 January 1966: line controlled by Birmingham New Street (NS) RBS24m 30ch Birmingham New Street (NS)
SP Spooner Row ETN111m 27ch 1881 2 December 2012 Cambridge (EN)
SR Unclear whether code used
S Unclear whether code used
SN Springbank North ADH1≈4m 19ch Hessle Road Junction (HR)
SS Springbank South ADH1≈4m 59ch ADH2≈0m 78ch Hessle Road Junction (HR)
SN Sproughton LTN170m 60ch 1925 9 December 1984 Colchester [new] (CO)
SV Spring Vale RBS210m 45ch Wolverhampton (WN)
SD1 Stafford No 1 LEC3133m 00ch 28 May 1962 Stafford No 4 (SD4)
SD2 Stafford No 2 LEC3133m 12ch Stafford No 4 (SD4)
SD3 Stafford No 3 Code presumed LEC3 Stafford No 4 (SD4)
SD4 Stafford No 4 LEC3133m 32ch 1960 29 August 2015 Rugby Rail Operating Centre (LS, WS)
SD5 Stafford No 5 LEC3133m 57ch ≈March 1952 29 August 2015 Rugby Rail Operating Centre (SC)
ST Stainforth Junction Code used from 4 June 1972 DOW6m 37ch 1 December 1916 29 June 1980 Doncaster (D)
Stainton Gate box NOB333m 60ch ≈1890 16 December 1989 Langworth (L)
SF Stairfoot Junction PED38m 45ch 1885 17 November 1985 line closed
S Stallingborough MAC3104m 71ch 1884 1 October 2007 Stallingborough [new] (ST)
ST Stallingborough [new] New 'box on opposite side of line MAC3104m 72ch 1 October 2007 30 December 2015 York Rail Operating Centre (ST)
SE Stalybridge Named Stalybridge No 2 to 6 November 1966 MVL27m 52ch 1886 4 November 2012 Manchester East Signalling Control Centre (SE)
Stalybridge No 2 See Stalybridge
SC Stamford Crossing Code used from March 1961. Downgraded to gate box September 1961: line controlled by Little Mill (LM) ECM740m 38ch 15 April 1978 Alnmouth (A)
S
SJ Standish Junction CGJ5≈9m 34ch Warrington (WN)
SJ Standish Junction BGL2100m 06ch 28 June 1908 14 October 1968 Gloucester (G)
S Stanford-Le-Hope TLL27m 31ch 19 May 1985 Pitsea Junction (PJ)
S Stanley Junction Code used to 2002 HGL27m 08ch 30 July 1961
SJ Code used from 2002
SJP Former Pitlochry area signals. Code used from 26 March 2019
ST Stanlow & Thornton Permanently switched out 6 August 2005 HHJ6m 04ch 1941 11 February 2008 Ellesmere Port (EP)
U Stanningley East Up direction automatic signals. Downgraded to shunt frame 15 March 1964: line controlled by Mill Lane Junction (M). Destroyed by fire 2 February 1980 LBE14m 09ch 1894 6 February 1980 Mill Lane Junction (M)
S Stannington Code used from June 1962 ECM713m 74ch 1 March 1991 Morpeth [temporary] (M)
D Down line automatic signals. Code used until 1977
U Up line automatic signals. Code used until 1977
SG Stanton Gate North Shunt Frame Out of use from 2002 TCC123m 65ch 19 October 1969 June 2006 Line closed?
SF Stanton Gate South Shunt Frame Code not confirmed TCC123m 36ch
SGF
S Stanway LTN149m 00ch 1893 10 December 1961 Colchester Station (CS)
SS Stapleford & Sandiacre Downgraded to shunt frame 18 October 1969: line controlled by Trent (TT) TCC122m 35ch 4 September 1949 9 October 2009 East Midlands Control Centre (TC)
SE Staplehurst XTD41m 65ch 1 April 1962 27 September 1993 Ashford IECC (AD)
A Automatic signals
SR Stapleton Road BSW1m 67ch 25 April 1920 17 October 1970 Bristol (B)
S Unclear if code used
SB Starbeck Formerly named Starbeck South. Code used from 2007 HAY118m 23ch
S Earlier code
SK Earlier code
SS Code when named Starbeck South
Starbeck South See Starbeck
ZC Star Bridge RED218m 41ch 29 December 1895 26 February 1983 Redhill A (RH)
CS Star Lane VTB216m 64ch 5 November 1899 22 November 1978 Three Bridges (T)
SK Staythorpe Crossing NOB114m 20ch 8 October 1950 5 November 2016 East Midlands Control Centre (NN)
SX At least one signal reading to Power Station sidings
SC Code not confirmed
SD1 Stechford No 1 Downgraded to shunt frame 2 July 1966: line controlled by Birmingham New Street (NS) RBS1108m 78ch Birmingham New Street (NS)
SD Shunt frame code
SD2 Stechford No 2 RBS1≈109m 17ch 2 July 1966 Birmingham New Street (NS)
NS Temporary code until taken over by Birmingham New Street
SC Steetley Colliery Sidings PSE ≈20 July 1985 Shireoaks Station (SS)
S Steeton TJC3215m 03ch 31 October 1924? 29 October 1989 Kildwick (K)
D Down line automatic signals
SJ Stenson Junction DBP14m 50ch 28 March 1954 28 June 1969 Derby (DY)
ST Steventon Downgraded to gate box 17 May 1965 MLN156m 57ch 1 April 1928 27 January 1974 Reading (R)
UM Up main line automatic signals
SY Stewartby Believed code not carried BBM11m 17ch 6 September 2004 Marston Vale (MV)
S Stewarts Lane BSF1m 34ch BSP11m 34ch 10 September 1933 17 May 1980 Victoria Signalling Centre (VS)
SL
BSL Stewarts Lane Depot SLC8
Stillington STF3m 71ch 18 February 1968 Norton on Tees West (NW)
SM Stirling Middle Code used from 1999 SCM3118m 08ch 4 August 1901
SK Stirling to Kincardine section
SN Stirling North Code used from 2002 SCM3118m 38ch 25 November 1900
S Stobcross Junction ARG23m 73ch 11 July 1909 26 May 1965 Line closed. Reopened 1979 controlled from Hyndland (HF)
SJ Stockport Junction Later code HAJ4m 69ch ≈January 1907 9 December 1984 Guide Bridge (GB)
S Earlier code
S1 Stockport No 1 Code used to 3 September 2004 CMP2182m 73ch 1884
ST1 Code used by 1989, used for all signals from 3 September 2004
S2 Stockport No 2 Code used to 3 September 2004 CMP2183m 08ch 1890
ST2 Code used by 1989, used for all signals from 3 September 2004
S Stocksfield NEC2≈13m 11ch 25 February 1969 Prudhoe (P)
Stocks Lane See Newland East
S Stoke ECM1100m 08ch 7 December 1886 5 July 1975 Peterborough (P)
SC Stoke Canon Crossing MLN1190m 16ch 1874 9 December 1985 Exeter (E)
SG Stoke Gifford Depot 28 September 2015✖date depot connected to network
SDE
YDE
SE Stoke Gifford East Codes used from 8 June 1970 SWB111m 44ch 1 May 1903 20 February 1971 Bristol (B)
DB Down Badminton line automatic signals
UB Up Badminton line automatic signals
Stoke Gifford West SWB111m 76ch 1 May 1903 20 February 1971 Bristol (B)
SH Stoke Hammond LEC1≈44m 43ch Bletchley (BY)
SL Stoke Lane NOB13m 66ch Netherfield Junction (NJ)
SE Stoke On Trent [panel] CMD219m 61ch 17 July 1966 25 May 2002 Stoke on Trent [temporary] (SOT)
SER Repeater signals
SOT Stoke On Trent [temporary] CMD219m 61ch 27 May 2002 28 September 2003 Stoke on Trent Signalling Centre (SOT)
SOT Stoke On Trent Signalling Centre In panel building CMD219m 61ch 29 September 2003 23 January 2024 in part Rugby Rail Operating Centre (CM, LS, RR) (in part)
CH Former Colwich area. Code used from 12 June 2005
NS Norton Bridge to Stone section
SC Stafford to Crewe section
SY Stoke Yard Shunt Frame Roughly opposite panel CMD2≈19m 61ch December 1984 Stoke on Trent [panel] (SE)?
S Stonea EMP82m 04ch 20 November 1984
SA Code used from 20 November 1984
SP Stonebridge Park CWJ6m 75ch 10 December 1988 Willesden Suburban (WS)
ST Stone Crossing Gate box, upgraded to block post 15 August 1965, downgraded to gate box 8 November 1970: line controlled by Dartford (D). Out of use from 25 February 2018 HDR19m 14ch ≈1904 Crossing closed
EBH Stonegate Formerly named Ticehurst Road TTH43m 66ch 6 May 1893✖inspection date 30 May 1984 Robertsbridge (RB)
SV Stonehaven Code used from 2002 ECN5224m 75ch 24 May 1901
SJ Stone Junction CMD2≈27m 05ch 16 July 1966 Stoke on Trent [panel] (SE)
SS Stora Sidings Ground Switch Panel TLL9m 54ch 27 May 1996
SS Stormy Sidings SWM2194m 51ch 1912 12 September 1965 Port Talbot (PT)
SY Code in use by 9 August 1959
SJ Stourbridge Junction OWW142m 25ch 1901 28 August 2012 West Midlands Signalling Centre (SJ)
S Stourton 'Temporary' 'box when opened TJC3193m 17ch 5 July 1981 28 July 2002 York [IECC] (S)
ST Stowmarket Downgraded to gate box 19 May 1985: line controlled by Colchester [new] (CO) LTN180m 53ch 1882
SP Stow Park SPD393m 12ch 6 July 1876 3 January 2014✖delayed from 10 June 2013 Lincoln Control Centre (LG)
S Code not confirmed, quoted in RSSB report
SC Strafford Crossing PED24m 30ch by 1889 27 February 1966 Barnsley (BY)
SR Strand Road Ground Frame [Preston] Code in use by 1984 PSR20m 43ch 1990s?
SH Stranraer Harbour Code used from 2002 STR453m 73ch 24 November 1897
S Stranton Code used from 19 July 1987 LEN371m 22ch 1911 13 November 2010✖demolished; official closure 13 November 2010 Ryhope Grange (NS)
S Stratford LTN13m 79ch 28 August 1949 6 April 1999 Liverpool Street North London Lines (S)
RS One down line shunt signal at Temple Mills
SE Stratford Eastern LTN14m 16ch 1891 28 August 1949 Stratford (S)
S
DE Down electric line automatic signals
DM Down main line automatic signals
UE Up electric line automatic signals
UM Up main line automatic signals
SJ Stratford Southern Junction DWW23m 79ch 1895 3 November 1984 Stratford (S)
Stratford Upon Avon East HSA9m 17ch 10 August 1933 5 April 1998 Bearley West Junction (BJ)
SW Stratford Western LTN13m 58ch 1893 4 September 1949 Stratford (S)
SJ Strathbungo Junction Believed code not carried GBK1m 19ch ≈December 1906 17 September 1973 Cathcart (C)
VZ Strawberry Hill Carriage Sidings Code used from 23 October 2008 SHF
SC Streatham Common Named Streatham Common North to 16 February 1936 VTB16m 44ch 1 July 1886 12 October 1952 Streatham Junction (BC)
CA Automatic signals
Streatham Common North See Streatham Common
FC Streatham Hill BBJ5m 46ch 1898 19 November 1967 Balham (DC)
BC Streatham Junction VTB16m 35ch 12 October 1952 9 August 1981 Victoria Signalling Centre (VC)
CA Automatic signals
S Streethouse Downgraded to gate box 17 May 1969 WAG152m 10ch 22 March 1987 Oakenshaw (O)
S Strensall Code used from 28 February 1988 YMS6m 49ch 1901
Strensall No 1 Downgraded to gate box: line controlled by Strensall (S) YMS6m 00ch 5 February 1989 Strensall (S)
SN Stretton SPC8145m 34ch 11 October 1969 Trent (TT)
EQ Strood Junction HDR31m 22ch VIR32m 69ch 29 January 1939 17 October 1971 Dartford (D) and Rochester (ER)
A Automatic signals
ST Sturry Code when restored to block post 2 June 2004 ACR72m 59ch 1893
SY Code used when downgraded to gate box 14 March 1964: line controlled by Canterbury West (EDH)
SW Sturt Lane Junction BML132m 15ch 25 September 1904 5 June 1966 Woking (WV)
SS Substation Ground Frame MLN1 Old Oak Common [new panel] (OO)
S Subway Junction MLN10m 76ch 10 September 1911 19 November 1967 Old Oak Common [new panel] (OO)
SJ
SY Sudbury NSS20m 67ch 1885
Sudbury Hill, Harrow Named South Harrow to 19 July 1926 NAJ12m 57ch 1905 29 May 1990 Marylebone [new] (ME)
SJ Sudbury Junction LEC1≈7m 69ch Wembley Mainline (WM)?
S Sudforth Lane Demolished over closure weekend WAG161m 09ch 1959 27 May 2014 Ferrybridge [new] (FE)
SL
R Repeater signals
S Summit Code used from 1972 WCM149m 51ch 3 October 1899 29 April 1973 Motherwell (MC)
S Sunderland Code used from new LEN389m 46ch 10 October 1965 11 January 2002 Tyneside (T)
SD Sunningdale Downgraded to gate box 8 September 1974 RDG126m 64ch ≈1878 5 September 1975 Feltham (F)
D Distant signals
SJ Sunnyside Junction Code used from 1960 NEM28m 43ch 8 August 1920 28 July 1991 Yoker (YS)
SJR Repeater signals
WN Surbiton BML112m 17ch 28 June 1936 1 March 1970 Surbiton [new] (S)
S Surbiton [new] BML112m 28ch 1 March 1970 14 April 1998 Woking ASC (WK)
WA Automatic signals
DWA Distant to automatic signals
DS Distant to controlled signals
SUB Sutton Bridge Junction SHL0m 65ch 1913
SU Sutton Junction BTH114m 71ch 4 January 1925 3 October 1982 Victoria Signalling Centre (VC)
CA Automatic signals
DCA Distant to automatic signals
SO Sutton Oak Junction SHS2 27? May 1989 Warrington (WN)
S Suttons 'Box name unclear: S signal present on HIM2 at about 26m 50ch HIM2 Ollerton Colliery (OC)
ST Swainsthorpe LTN1109m 65ch 1885 19 October 1986 Colchester [new] (CO)
EL Swanley VIR17m 39ch 16 April 1939 19 June 1983 Victoria Signalling Centre (VS)
A Automatic signals
SM Swansea Maliphant depot SWM2 2015
SY Swinderby NOB124m 68ch 6 January 1901 Lincoln Control Centre (NL) (planned)
S
SN Swindon MLN177m 19ch 3 March 1968 22 February 2016✖delayed from 23 August 2014, then again from 23 May 2015 Thames Valley Signalling Centre (SW)
BD Down direction automatic signals on up Badminton line
BU Up direction automatic signals on down Badminton line
DB Down Badminton line automatic signals
DK Down Kemble line signals
DM Down main line automatic signals
SND Down direction automatic signals on up line between Hullavington and Wootton Bassett
SNU Up direction automatic signals on down line between Hullavington and Wootton Bassett
U Up Badminton line automatic signals
UB Up Badminton line automatic signals
UK Up Kemble line signals
UM Up main line automatic signals
SB Swindon B IECC MLN177m 60ch 13 September 1993 27 December 2012 Thames Valley Signalling Centre (SB)
DM Down main line automatic signals
DR Down relief line automatic signals
UM Up main line automatic signals
UR Up relief line automatic signals
LY Swindon Locomotive Yard SWM177m 64ch 27 January 1924 29 June 1968 Swindon (SN)
Swing Bridge East PMT24m 64ch 21 April 1899 1997 Carmuirs East Junction (CEJ)
S Swinton Junction Code believed used from 1979 SMJ1167m 24ch ≈4 October 1982 Sheffield (SA)
SS Swinton Station Possibly also named Swinton Town TJC3166m 72ch ≈22 April 1973 Kilnhurst (K)
S Existence of code uncertain
Swinton Town See Swinton Station
SJ Swynnerton Junction NBS2m 06ch 5 August 1940 21 November 1965 Norton Bridge (NB)
Sykes Junction SPD390m 04ch 1885 18 September 1988 Saxilby (S, SY)
SS Syston South Junction SPC5103m 72ch 26 November 1911 12 April 1987 Leicester (LR)