Signal box prefix codes

A (hopefully) comprehensive listing

'Boxes beginning G

Last update 18 November 2009

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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
G Gaer Temporary panel SWM2 159m 34ch 27 November 1961 9 December 1962 Newport (N)
GN Gaerwen At least 2 distant signals CNH3 245m 9ch 1882    
GC Gainsborough Central   MAC3 74m 30ch 1885    
LR Gainsborough Lea Road Burnt down 11 February 2009 SPD3 98m 3ch c1877 15 February 2009 Gainsborough Trent Junction (TJ)
TJ Gainsborough Trent Junction   MAC3 73m 24ch 1964    
G Galashiels Code used from 1937     10 January 1937 27 April 1969  
  Garden Street   MAC3 109m 27ch 1881 September 1993 Pasture Street (P)
G Garforth         10 November 1984 Peckfield (P)
D Down line automatic signals
U Up line automatic signals
GD Garngad   SGN     ? Yoker (YS)
  Garnqueen North Junction   SCM3 97m 5ch c1890 1 May 1999 Cowlairs (CN)
G Garsdale   SAC 256m 55ch 1910    
  Garston Church Road   SCR 24m 0ch 1969 ? Speke Junction (SE)
GJ Garston Junction Destroyed by fire 2002 SCR 23m 47ch 1908 10 April 2006 Speke Junction (SE)
  Gartcosh   GHE 97m 6ch 12 May 1899 1 May 1999 Cowlairs (CN)
GS Gartsherrie South Junction   SCM3 95m 64ch 20 December 1903 1 May 1999 Motherwell (MG)
GW Gascoigne Wood   MGW 6m 27ch 1908    
G
B Gascoigne Wood down sidings Discharge bunker signals
(Also had draw-ahead signals in colliery sidings lettered A to E, with no number)		 HUL3        
GF Gas Factory Junction   FSS1 2m 52ch     Upminster (UR)
G Gateshead   PLG2 0m 5ch 9 December 1962 12 April 1991 Tyneside (T)
D Down direction automatic signals
R Banner repeater signals
U Up direction automatic signals
CM Gatwick Airport Renamed from Gatwick Racecourse 25 May 1958; originally named Gatwick VTB3 26m 50ch   26 April 1978 Three Bridges (CL)
CA Automatic signals
G Geneva   DSN1 c1m 16ch   13 May 1972 Darlington (D)
GC Gerrards Cross   NAJ2 7m 33ch   13 August 1990 Marylebone (ME)
GH Gibbet Hill   LSC2     December 1972 Coventry (CY)
GP Gidea Park   LTN1 13m 63ch 1931 23 August 1997 Liverpool St (L)
DL Down local line automatic signals
DT Down through line automatic signals
UL Up local line automatic signals
UT Up through line automatic signals
  Gidea Park EMU Sidings   LTN1 13m 75ch ?    
G Gilberdyke Junction   HUL1 17m 7ch 1903    
GM Gillingham (Dorset)   BAE2 105m 23ch 28 April 1957    
GH Unclear whether code used
ES Gillingham 'A' (Kent)   VIR 35m 78ch   21 January 1973 Gillingham (ET)
ET Gillingham (Kent) Was Gillingham 'B' to 21 January 1973 VIR 36m 15ch 1913    
A Automatic signals
CFC Gipsy Hill Three signals only, for 3 months BBJ     1969 Victoria SC (VC)
GV Girvan Code used from 2002 STR2 0m 18ch 1893    
  Glaisdale   MBW2 c26m 50ch 1902 20 August 1989 Nunthorpe (N)
G Glasgow Central Code used from 1961 AYR1 0m 2ch 2 January 1961    
GR Banner repeater signals WCM2 101m 54ch
T G Some shunt signals: "T" indicates telephone present
(See this sketch)
GC Glasshouse Crossing Mileage accuracy unknown PED2 6m 48ch   ?  
GE Glazebrook East   MAJ 24m 60ch 1961    
G Glencraig Junction   CWH3 c29m 37ch 21 April 1896 10 May 1981 Edinburgh (ET)
GN Glendon North Junction   SPC3 74m 77ch     Leicester (LR)
GW Glenwhilly Code used from 2002 STR2 20m 70ch 1905    
G Gloucester   BAG2 92m 69ch 25 May 1968    
DC Down Charfield line automatic signals
DG Down goods line automatic signals
DK Down Kemble line automatic signals
DM Down main line automatic signals
GL Signals controlling crossings supervised by Lydney gate box
GU Up direction signals on down main/down Charfield lines
UA Up avoiding line automatic signals
UC Up Charfield line automatic signals
UK Up Kemble line automatic signals
UM Up main line automatic signals
ES Gloucester Engine Shed Junction   CHL 92m 30ch 22 February 1942 26 May 1968 Gloucester (G)
CY Gloucester Road Junction   VTB1 9m 59ch 21 March 1954 7 April 1984 Three Bridges (T)
GN Gobowen North   WSJ2 189m 57ch 1884    
GE Godley East Junction   HAJ     by 1973 Godley Junction (GJ)/Mottram No 1 (M1)
GJ Godley Junction   HAJ 8m 24ch   7 December 1984 Dinting (DG)
G Godnow Bridge Gate box: line controlled by Doncaster (D).  Believed code not carried DOW 14m 6ch 1886    
GD Godstone   RTT 27m 30ch   1986 Three Bridges (T)
(Retained as a ground frame)
GS Ground frame code
GS Golborne Station   CGJ5 c1m 40ch   30 September 1972 Warrington (WN)
GM Gomshall Code used on one signal for 11 days in 1980 whilst control passed to Shalford (WY) and Betchworth (BW) RSJ 35m 17ch 1941 1980 Shalford (WY) and Betchworth (BW)
G Goodmayes   LTN1 9m 36ch 26 September 1949 29 March 1997 Liverpool St (L)
DE Down electric line automatic signals
DM Down main line automatic signals
UE Up electric line automatic signals
G Goole Renamed from Boothferry Road 19 January 1975 TJG2 6m 51ch 1909    
BR Code when named Boothferry Road
D Down line automatic signals
R Shunt signals
E Goole Engine Shed Temporary 'box on opposite side of line to previous, damaged, one WAG1 73m 52ch c25 May 1980 19 October 1980 Goole (G)
WAG2 0m 64ch
WAG3 73m 52ch
GB Goole Swing Bridge Britain's first panel 'box (circa 1931), predating Thirsk TJG2 5m 8ch 1869    
D Down direction automatic signals
U Up direction automatic signals
G Goonbarrow Junction   NEW 287m 40ch 1909    
GJ Goose Hill Junction   MVN2 50m 31ch   2 October 1988 Wakefield Kirkgate (K)
G Code reported probably in error TJC3 184m 56ch
G Gordon Hill   HDB c9m 55ch   4 July 1976 Kings Cross (K)
GG Goring   BLI1 13m 10ch by 1907 1988 Lancing (LG)
G Gorgie Junction   SUB2   14 December 1897 15 December 1975 Haymarket (HC)
G Gorton Junction   HAJ 2m 43ch   May 1984 Ashburys (AS)
GO Gosberton   SPD1 49m 13ch 1882    
GO Gospel Oak   BOK2 1m 12ch 1985    
G Goswick Code used from 10 April 1960 ECM7 60m 67ch   28 March 1982
(delayed from 15 March 1981)		 Tweedmouth (T)
D Down direction automatic signals
U Up direction automatic signals
GK Gourock Renamed 14 March 1966 from Gourock No 2 GOU2 c126m 20ch 31 May 1889 22 September 1985 Paisley (PU)
G Goxhill   BAR 104m 50ch 1910    
- Grain Crossing Gate box: line controlled by Ashford (NK) HTG 38m 23ch 1882    
GC Grange Court   GCT 121m 41ch     Gloucester (G)
GE Grange Junction "Temporary" closure 2 March 2002 CMD2 18m 26ch 26 February 1966 17 May 2002 Stoke on Trent (SOT)
GH Grangemouth Junction Code used from 1979 PMT 23m 75ch c1882    
GS Grange Over Sands Code used from 2008 CBC1 9m 31ch 1956    
G Grangetown Code in use by 1973 DSN2 18m 65ch 30 May 1954    
D Down line automatic signals
R Distant signals
RR Outer distant signals
G Grantham Named Grantham Yard until 20 February 1972 ECM1 c105m 30ch     Doncaster (D)
GN Grantham North   ECM1 c105m 45ch   20 February 1972 Grantham (G)
D Down line automatic signals
R Repeater signals
U Up line automatic signals
GS Grantham South   ECM1 105m 1ch   20 February 1972 Doncaster (D)
EZ Graveney Crossing   VIR 54m 78ch   1972 Faversham (EY) and Margate (GE)
GG Grayrigg Code used from 15 April 1973 CGJ7 c26m 26ch   28 April 1973 Carlisle (CE)
G Grays   TLL 19m 77ch   8 April 1996 Upminster (UR)
GB Great Barr   PBJ c7m 54ch ?   Walsall (WL)
  Great Bentley Downgraded to gate box 21 December 1958: line controlled by Thorpe-le-Soken (T) COC 60m 62ch ? 4 May 2009 Colchester (CO)
CH Great Chesterford   BGK c45m 56ch 1881 11 December 1983 Cambridge (CA)
GC Great Coates No 1   MWN 108m 34ch 1909    
GM Greatham Code from 1 November 2004 LEN3 67m 27ch 1889    
G Earlier code (in use by 1975)
A Great Missenden Automatic signals MCJ2 29m 0ch 1 September 1892 23 April 1990 Marylebone (ME)
R Repeater signals
  Great Rocks Junction   CNB1 163m 2ch 1923    
GS Greaves Sidings Uncertain if prefix actually carried on signals DCL 99m 13ch 1918 ? Fenny Compton (FC)
GK Greenbank   CDM2 22m 21ch 1975    
G Greenfield Junction   MVL3 12m 46ch 1888 5 April 1999 Stalybridge (SE)
  Greenfoot LC   SCM3 97m 59ch ? 18 April 1999 Cowlairs (CN)
G Greenford East General code as shown on signalling plans ANL 7m 44ch 1904    
GE One signal only on signalling plans, but many "on the ground"
DB Down branch line automatic signal
GJ Greenhill Junction Renamed from Greenhill Upper Junction 8 June 1975.  Code used from 1971 EGM1 17m 28ch ?    
GU Code used from 1966
GL Greenhill Lower   SCM3   ? 9 June 1975 Greenhill Junction (GJ)
GL Green Lane Crossing   WSJ2 211m 1ch c1925 13 January 1985
(or 5 January 1986?		 Chester PSB (CR)
OW Green Lanes Crossing   WPH2     1968 Portsmouth (PW)
GL Greenloaning Code used from 2002 SCM4 129m 18ch 2 July 1891    
GW Greenock West   GOU2 c123m 76ch 31 May 1889 12 February 1967 Ladyburn (later Paisley (P))
HM Greetland Emergency Operating Panel Panel still available for emergency use: dates for regular planned use MVN2 30m 77ch 27 July 2009 7 August 2009 Healey Mills (HM)
G Greetland Junction   MVN2 30m 77ch 1942 26 July 2009 Greetland Emergency Operating Panel (HM)
  Greetland Mill   BFB 7m 27ch by 1880 27 November 1966 Bradford Junction
G Greskine   WCM1 45m 31ch ? 29 April 1973 Motherwell (MC)
GL Gresty Lane Gresty Lane No 1 until October 1984 SYC 0m 33ch 1899    
GA Gretna Junction   WCM1 8m 57ch 10 October 1915 8 July 1973 Carlisle (CE)
GAR Distant signals
GJ Griff Junction   CNN     3 February 1985 Nuneaton (NN)
GD Grindleford   MAS 159m 6ch 1934    
B Grimesthorpe Junction No 2 Temporary code until transfer completed TJC2 c160m 34ch   8 August 1965 Brightside (B)
G Grimethorpe Colliery Panel in shunter's cabin.  (Also had draw-ahead signals in colliery sidings lettered B, with no number)     by 1983   Colliery closed
GC
G Gristhorpe Downgraded to gate box 13 March 1983: line controlled by Seamer West (SW) HBS 46m 38ch 1873    
EBF Grove Junction Code used from 25 March 1962 TTH 34m 56ch 1932 19 April 1986 Tonbridge (PE)
A Automatic signals
Z Grove Park Code used from c1960 XTD 9m 7ch   3 February 1962 Hither Green (P)
GR Grove Road Downgraded to gate box 22 August 1976; line controlled by Retford (RD) (later Doncaster (D)) ECM1 137m 37ch 1880    
GC Grovesend Colliery Loop   SDI2 9m 35ch   ? Port Talbot (PT)
GB Guide Bridge Code from 10 December 1984 HAJ 5m 4ch 1906    
R Banner repeater signals
A Code to 10 December 1984 when renamed from Ashton Junction
  Guide Bridge East Junction Code unknown but believed used HAJ 5m 31ch   December 1984 Guide Bridge (GB)
WX Guildford [panel]   WPH1 30m 9ch 17 April 1966 30 October 1998 Guildford ASC (GD)
CA Automatic signals
DCA Distant to automatic signals
RWA Repeaters to automatic signals
WA Automatic signals
GD Guildford ASC   WPH1 30m 40ch 30 October 1998    
WY Guildford South   WPH1   by 1917 17 April 1966 Guildford [panel] (WX)
WX Guildford Yard   WPH1 30m 7ch by 1917 17 April 1966 Guildford [panel] (WX)
G Guisborough Junction Burnt out June 1980 DSN2 c15m 23ch   June 1980 Guisborough Junction [temporary] (G)
G Guisborough Junction [temporary]   DSN2 c15m 23ch June 1980 8 May 1982 Middlesbrough (M)
GY Guiseley Also called Guiseley Station ILK1 205m 22ch 1906 11 July 1994 Leeds (L)
G Guiseley Junction   TJC3 205m 45ch 1901 25 July 1994 Leeds (L)
GJ GUE 3m 41ch
G Gunhouse Junction   DOW c20m 32ch   1 April 1973 Scunthorpe (S)
WBM Gunnersbury   SAR2 9m 68ch 1 January 1869 26 March 1980 Richmond (GB)
G Gyfeillon Upper   THT 14m 34ch c1897 1984 Pontypridd (P)

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

 

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