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Signal Box Letter Codes

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Code letters are of necessity duplicated but are so arranged that the reuse or duplication of the codes is sufficiently separated geographically to avoid any confusion to drivers and others as to which is the supervising signal box.

Once a code letter or letters had been assigned to a signal box they normally remained in use until the box concerned closed.

The practice of putting signal numbers on plates attached to the signal posts originally came about with the introduction of multiple aspect signalling and was confined to signals within those schemes.

Semaphore signals and odd colour light signals (such as distants) in sempahore signalled areas did not normally carry number plates.

Signal numbers used within power station or other industrial complex sidings are excluded from the lists which have mostly been compiled from signalling notices held by the Society.


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

"LT" in the Region column indicates London Underground system including predecessor companies.


British Railways Eastern Region

Including: London & North Eastern Railway, British Railways North Eastern Region, Railtrack Anglia, Railtrack London North Eastern, Network Rail Anglia, Network Rail London North Eastern.

Code letters generally related to the name of the controlling signal box with certain codes reserved for automatic signals. With the advent of the Regional Control Centres, letters relate to a section of line or lines within the area controlled.


British Railways London Midland Region

In earlier Power Signal Box installations automatic signals were given the same prefix code as the controlled signals. However, they were usually numbered in a separate separate number series from the controlled signals.


British Railways Scottish Region

Initially the Scottish Region followed the main BR practice of relating the box code to the signal box name. However, in 1975 a departure from this practice appeared with Edinburgh area codes having the second letter generally relevant to a geographic area. This started with Haymarket being allocated EH.


British Railways Southern Region

Including Southern Railway, Railtrack South Zone, Network Rail South Zone.

Colour light signals in the form of multiple aspect signalling was first introduced in 1926 when the area from Holborn to St Pauls and Elephant & Castle was commissioned from Sunday 21 March. Initially single letter codes were used in sequential order in the down direction. First usage of the codes was confined to the diagrams accompanying the signal notices and they do not seem to have been used on the signal posts themselves. Indeed, the narrative in the notices referred to the signals by the more established terms of 'home', starting' and so on.

It seems possible that signal numbers were appearing on the posts by the autumn of 1926 as signal notice 34 refers to signals by their number at Holborn Viaduct and notice 18 (1927) refers to Charing Cross signals by both prefix and number. However, the first notice to explicity state that plates bearing the signal letters and numbers would be affixed to the signal posts was 20 of 1928 with the introduction of colour light signals from London Bridge to Bricklayers Arms Junction.

With the 1932 resignalling of the Brighton line from Coulsdon to the coast a change of policy was evident and the sequential allocation of box letters used two letter codes. The first letter was "C" (central section) followed by the sequential letter allocated in the up direction. "CA" was used for automatic signals.

This seems to have been the first manifestation of a strategic plan which continued well into Southern Region days to roll out colour light signalling as subsequent introduction of such revealed various two and three letter series of codes starting "C", "E" (Eastern section) and "W" (Western section). The series expanded to two letter codes where the 'section letter' appeared second and into three letter codes. In later years the allocation of codes seemed more 'gap filling' than a coherent plan.

As with any strategy abberations would occur. Some boxes received codes relating to the signal box name. However, most of these seem to be been intended to have short lives as the box concerned was abolished at the next stage of resignalling. Some of this was delayed by World War II and the financial constraints that followed.

From 1969 new code letters allocated to Power Signal Boxes generally related to the name of the signal box. By 1973 this practice had been extended to mechanical boxes as well. The new Victoria PSB heralding including automatic signal numbers within those of the the supervising signal box rather than using different code letters.

With the advent of the Regional Control Centres, letters relate to a section of line or lines within the area controlled.


British Railways Western Region

Including: Railtrack Great Western, Network Rail Great Western.

Code letters generally related to the name of the controlling signal box with certain codes reserved for automatic signals.

Automatic signals were coded D (down) and U (up) followed by M (main) or R (relief). Other letters were also used with meanings dependent on the location or area - see table. Numbers were based in milepost mileage thus DM79 would be located between the 79 and 80 mileposts. Where more than one automatic signal existed between the same pair of mileposts they would be numbered DM79A, DM79B etc.


Codes Listed in Alphabetical Order

Code Location Region RailRef From Notice To
A Aberdeen Scottish   1981 Aberdeen  
A Aberdour Scottish   1979 Inverkeithing 1979
A Abington Scottish   1972 Abington  
A Acton Western GW040 1962 LW 50  
A Aldwarke Junction Eastern MR840 1965 Aldwarke  
A Appleford Western GW080     1965
A Moorgate LT MT060 by 1921    
A Aviemore Scottish   1979 Kingussie  
A Baker Street Junction LT MT001 by 1921    
A Eastern section automatic signals Southern   1928 20  
A Holborn Viaduct Southern SE106 1926    
A Praed Street Junction LT MT001 by 1921    
AC Aviemore, Carrbridge Scottish   1979 Kingussie  
AD Addlestone Southern SW053 1970 29 SWD  
AD Airdrie Scottish   1960 Sunnyside 1991
AD Ashford SC Southern SE040 1993 1  
AE Ardmore East Scottish   1960 Ardmore  
AE Ashburys East Midland GC370 1984 100E 1984
AF Ashford CTRL HS001 2003 RTS 1  
AG Acton Grange Junction Midland   1972 1201G 1972
AJ Arpley Junction Midland   1972 1201G  
AJ Arundel Junction Southern     19 CD 1979
AK Aviemore, Kincraig Scottish   1979 Kingussie  
AL Allington Eastern GN140 2005 NR-LNE-04  
AM Aviemore, Moy Scottish   1979 Kingussie  
AN Aston Signalling Centre Midland   1992 130e  
AR Ancaster Eastern GN264 2005 NR-LNE-04  
AR Arundel Southern   1979 19 CD  
AS Aberdare Sidings GF Western GW060 1962 LW 50  
AS Aldershot "A" Southern SW062 1970 33 SWD  
AS Ashburys Midland GC370 1984 100E  
AS Aviemore, Slochd Scottish   1979 Kingussie  
ASA Aldershot "A" Ground Frame "A" Southern SW062 1970 33 SWD  
AT Aviemore, Tomatin Scottish   1979 Kingussie  
AW Ardmore West Scottish   1960 Ardmore  
AW Ashburys West Midland GC370 1984 100E 1984
AX Alexandria Scottish   1960 Balloch  
AY Acton Yard Western GW040 1962 LW 50  
AY Astley Midland   1972 1201G  
AY Athelney Western GW234 1985 6  

Code Location Region RailRef From Notice To
B Barassie Scottish   1982 Barassie  
B Beattock Scottish   1972 Beattock  
B Beal North Eastern NE740 1960 15A  
B Blackfriars Southern   1926 10 1931
B Bo'ness Junction Scottish   1978 Winchburgh 1979
B Boroughbridge Road Eastern   1939 22  
B Bow Junction Eastern GE001 1949 3098  
B Brentwood Eastern   1933 2718  
B Brightside Junction Eastern   1965 C (Brightside)  
B Bristol PSB Western GW153 1970 S 2646  
B Brocklesby Junction Eastern   NR-LNE-41 2015
B Bromley LMSR MR030 1927 Bow-Barking  
B Drayton Park LT MT060 by 1921    
B Edgware Road LT MT001 by 1921    
B Metropolitan Junction Southern SE001 1926 10  
B St Botolphs Eastern GE231 1958 3395  
B St John's Wood LT MT030 by 1921    
BA West Midlands SCC Blackwell - Ashchurch LNW MR250 2016 NR LNW 87  
BB West Midlands SCC Birmingham - Blackwell LNW MR250 2016 NR LNW 87  
BC Burnley Central Midland   1972 1202G  
BC Streatham Junction Southern   1952 2 1981
BD Barrhead Scottish   1974 Glasgow Extension  
BD York ROC, Barnetby - Doncaster Eastern   2015 NR-LNE-41  
BE Barnetby East Eastern       2015
BE Bushey LMSR NW066 1933 New Line  
BE Whitstable & Tankerton Southern SE131 1959 5 SED  
BG Barking Ground Frame LMSR MR030 1929 Bow-Barking  
BG Bethnal Green Eastern   1949 3086  
BG Borough Green Southern SE121     1983
BG York ROC, Barnetby - Gainsborough Eastern   2015 NR-LNE-41  
BGS Bishopsgate South Eastern GE001 1949 3086  
BH Balloch Scottish   1960 Balloch  
BH Barnham Southern LB090 1979 19 CD  
BH Basford Hall Junction Midland NW200 1961 706G  
BH Bathampton Western GW150 1967 S 2503  
BH Brockenhurst Southern SW100 1978 56 SWD  
BJ Bamfurlong Junction Midland   1972 1201G 1972
BJ Bellside Junction Scottish   1973 Motherwell 7  
BJ Blackfriars Junction Southern SE106 1931 Drivers &c 1935  
BJ Blackrod Junction Midland   1972 1202G  
BJ Bootle Junction Midland LY190 1977 500G  
BJ Bow Junction Eastern GE001 1949 3086  
BJ Bradford Junction Western GW190 1969 S 2629  
BJ Broxbourne Junction Eastern GE020 1960 3468  
BK Barking Eastern   1961 200  
BK Berwick Southern   1976 13 CD  
BL Bare Lane Station Midland   1972 1202G  
BL Bellgrove Scottish   1960 Bellgrove 1991
BL Thames Valley ROC - Bristol Western   2016 NR-GW-41  
BL York ROC, Barnetby - Lincoln Eastern   2015 NR-LNE-41  
BM Badminton Western GW120 1967 S 2517 1971
BM Bingham Eastern       2015
BN Bracknell Southern SW050 1973 40 SWD  
BN Broxbourne Eastern   1960 3549  
BP Battersea Pier "A" Southern   1938 45 1939
BP Bestwood Park Eastern   1993 3 (TLF)  
BR Betley Road Midland NW200 1961 706G  
BS Barkston South Eastern   1937 RR279  
BS Bishop's Stortford Eastern   1960 3549  
BS Bromsgrove South Western MR270 1969 S 2609 1969
BS Willesen Brent Sidings Midland   1993 6 (TLF)  
BSL Stewarts Lane Depot Southern SE002 1994 GESN 1  
BT Botley Southern SW072 1973 42 SWD 1982
BW Barking West LMSR MR030 1928 Bow-Barking  
BW Bottesford West Eastern       2015
BW Bowling Scottish NB418 1959 Dalmuir 1959
BW Bowling Scottish NB418 1959 Bowling 1991
BW Wootton Bassett West Western GW110 1966 S 2501  
BY Bletchley PSB Midland NW110      
BY Bromley Cross Midland   1972 1202G  

Code Location Region RailRef From Notice To
C Cambuslang Goods Scottish   1960 Newton  
C Cannon Street Southern SE004 1926 19  
C Campbell Road Junction LMSR MR030 1927 Bow-Barking  
C Carstairs Scottish   1972 Abington  
C Cathcart Scottish   1961 Cathcart 1  
C Chadwell Heath Eastern GE001 1949 3092 1949
C Charlestown Junction Scottish   1979 Inverkeithing 1980
C Chelmsford Eastern   1937 2849  
C Churchdown Western GW375 1966 S 2499  
C Clacton-on-Sea Eastern GE230 1959 3424  
C Clapton Eastern   1950 RR409  
C Clarborough Junction Eastern   1964 C (West Burton)  
C Cleeve Western MR270 1968 S 2597 1969
C Cogload Western GW230 1972 S 2694  
C Cornbrook West Junction CLC CL050 1935 Manchester Central  
C Cowlairs Scottish   1956 Cowlairs  
C Croft Eastern   1939 11  
C Craigendoran Scottish   1984 Craigendoran 1991
C Craigentinny Scottish   1973 Portobello 1976
C Craigentinny Chargeman Scottish   1976 Portobello  
C Cupar Scottish   1980 Ladybank  
C Cowlairs Scottish   1985 Cowlairs  
C Finchley Road LT MT030 by 1921    
C Finsbury Park LT MT060 by 1921    
CA Cambridge IECC Eastern   2003 EA No.5  
CA Carlisle PSB Midland CJ001      
CA Central section automatic signals Southern   1932 17  
CB Brighton Southern   1932 40 1983
CB Camberley Southern SW056 1973 41 SWD  
CB Canterbury East Southern SE120     2011
CB Cawburn Junction Scottish   1986 Newbridge 1 1986
CB City Basin Western GW250 1985 10  
CB Colwyn Bay Midland NW460 1985 35E  
CB York ROC, Cleethorpes - Barnetby Eastern   2015 NR-LNE-41  
CBF Epsom Southern   1964 1 CD  
CBG Ashtead Southern   1964 1 CD  
CBH Leatherhead Southern   1964 1 CD  
CBK Dorking North Southern   1938 21  
CBP Horsham Southern   1938 16  
CBV Arundel Southern     19 CD 1979
CBW Ford Southern LB090   19 CD 1979
CC Castle Cary Western GW190 1984 4 1985
CC Chichester Southern LB090 1985 5  
CC Preston Park Southern   1932 40 1985
CCF Portslade Southern       1988
CCO Newhaven Town Southern   1976 13 CD  
CD Cadder Scottish   1956 Cowlairs  
CD Carmondean Junction Scottish   1986 Newbridge 1 1986
CD Chingford Eastern   1960 3499  
CD Clayton Cutting Southern   1932 36  
CD Clydebank Dock Junction Scottish   1959 Dalmuir 1989
CD Cumbernauld Scottish   1975 Greenhill  
CDB Hampden Park Southern LB122 1991 2 2015
CE Carlisle PSB Midland CJ001 1972 1202G  
CE Cornbrook Junction East Midland CL050 1969 798G  
CE Hassocks Southern   1932 36 1982
CF Burgess Hill Southern   1932 36  
CF Codford Southern   1979 57 SWD  
CG Croftengea Scottish   1960 Balloch  
CG Keymer Crossing Southern   1932 36 1983
CH Charfield Western MR340 1969 S 2632  
CH Chingford Eastern   1950 RR409  
CH Haywards Heath Southern   1932 23 1983
CJ Balcombe Station Southern   1932 36  
CJ Camps Junction Scottish   1981 Slateford  
CJ Cheshunt Junction Eastern   1960 3549  
CJ Clarborough Junction Eastern   1965 C (Thrumpton)  
CJ Colchester Junction Eastern   1960 3610  
CJ Colchester Junction Eastern GE210 1958 3395  
CJ Colne Junction LMSR NW066 1933 New Line 1966
CK Balcombe Tunnel Southern   1932 17  
CK Cooks Crossing Southern   1969 25 SWD  
CL Charlton Lane Crossing Southern SE020 1970 28 SED  
CL Three Bridges Southern   1932 17 1983
CM Camlachie Scottish NB350 1960 Parkhead  
CM Caterham Southern SE071   40 CD 1983
CM Gatwick Racecourse / Airport Southern   1932 17 1978
CN Claydon LNE Junction Midland   2015 NR-LNW-082  
CN Craigendoran Scottish   1960 Craigendoran  
CN Crow Nest Junction Midland   1972 1201G  
CN Horley South Southern   1932 17  
CN ?? (Wrexham area) Midland   2015 NR-LNW-084  
CN Willesen Carriage Shed North Midland   1993 6 (TLF)  
CO Colchester Eastern   1961 51  
CO Cooksbridge Southern   1976 13 CD  
CP Carpenders Park LMSR NW066 1932 New Line  
CP Horley North Southern   1932 17  
CQ Cowlairs, Queen Street Scottish   1985 Cowlairs  
CQ Salfords Southern   1932 17  
CR Cadder Scottish   1971 Cadder - Greenhill  
CR Camden Road Junction Midland   2000 SA-10-MZ  
CR Chester PSB Midland        
CR Cuxton Road Southern SE120 1934 25 1959
CR Earlswood Southern   1932 17 1983
CR4 Chester No.4 Midland BJ002 1981 350G  
CS Cardross Scottish   1961 Dumbarton 2 1984
CS Carnforth Station Midland   1972 1202G  
CS Chadwell Heath Station Eastern GE001 1949 3092  
CS Colchester Station Eastern   1960 3610  
CS Cook Street Scottish   1960 Glasgow 1966
CS Star Lane Southern   1932 17  
CT Control Tower, Lindsey Oil Refinery Eastern   1967 Immingham  
CT Control Tower, Ripple Lane Eastern   1961 9  
CT Coulsdon North (former No.1) Southern   1937 20 1983
CT Coulsdon North No.2 Southern   1932 17 1937
CU Purley Southern   1955 1  
CV South Croydon Southern   1955 1 1984
CW Carmuirs West Scottish   1975 Greenhill  
CW Clyde Ironworks Scottish   1973 Glasgow Extension  
CW East Croydon Southern   1955 1 1984
CW East Croydon North Southern   1954 1 1955
CX Charing Cross Southern SE001 1935 Appendix Supplement 1  
CX Cuxton Southern SE020a 1971 36 SED  
CXA Cuxton Ground Frame "A" (Metal Box) Southern SE020a 1971 36 SED  
CY Chertsey Southern SW053 1970 29 SWD 1974
CY Clapham Yard Shunt Panel Southern   1990 3  
CY Gloucester Road Junction Southern   1954 1 1984
CZ Thornton Heath Southern   1952 1  

Code Location Region RailRef From Notice To
D Borough Market Junction Southern SE001 1926 19  
D Dartford PSB Southern SE020a 1971 36 SED  
D Dinwoodie Scottish   1971 Loockerbie  
D Down Line Automatic signals Eastern   1928 o1817  
D Drax Eastern   1993 2 (TLF)  
D Dumbarton Scottish   1960 Dumbarton 1 1991
D Dumfries Scottish   1957 Dumfries  
D Farringdon Street LT MT001 by 1921    
D West Hampstead LT MT030 by 1921    
DA Down Athelney Line Automatic Signals Western GW234 1985 6  
DB Down Badminton Line Automatic Signals Western GW120 1967 S 2517  
DB Dunblane Ssotland        
DB Dunbridge Southern SW126 1982 69 SWD  
DC Balham Southern   1952 2 1981
DC Down Charfield Line Automatic Signals Western MR340 1968 S 2583  
DC Down Chingford Line Automatic Signals Eastern   1960 3499  
DC Down Clapton Line Automatic Eastern GE020 1935 2769  
DD Dagenham Dock Eastern MR050 1961 26  
DE Birchington-on-Sea Southern SE131 1959 5 SED  
DE Down Local Line Automatic Signals Eastern GE001 1949 3091  
DE Down Through Line Automatic Signals Eastern GE001 1949 3086  
DF Down Fast Line Automatic Signals Eastern   1960 3499  
DG Dinting Junction Midland CL002 1984 225E  
DG Down Goods Line automatic signals Eastern   1961 200  
DG Down Goods Line automatic signals Western   1969 S 2617  
DJ Dalmeny Junction Scottish   1975 Haymarket 1979
DJ Deepdale Junction Midland   1972 1202G  
DJ Denton Junction Midland NW790 1984 225E  
DK Down Kemble Line automatic signals Western   1970 S 2668  
DL Down Local Line Automatic signals Eastern   1933 2718  
DM Down Local Line Automatic Signals Eastern GE001 1949 3086  
DM Down Main Line automatic signals Eastern   1961 200  
DM Down Main Line automatic signals Western   1965 LXO 73  
DM Down Through Line Automatic Signals Eastern GE001 1949 3091  
DN Darlington North Eastern   1939 11  
DP Dalmuir Park Scottish NB418 1959 Dalmuir  
DP Dover Priory Southern SE120 1980 50 SED  
DR Dorchester South Southern SW100 1987 2  
DR Down Relief automatic signals Western   1965 LXO 73  
DS Daiseyfield Midland   1972 1202G  
DS Darlington South Eastern   1939 11  
DS Deal Street Midland   1993 110E  
DS Doncaster South Eastern   1947 RR451  
DS Down Slow Line Automatic Signals Eastern   1960 3499  
DS Down Southend Line Automatic signals Eastern   1933 2718  
DS Down Suburban Line Automatic Signals Eastern GE001 1949 3086  
DS Down Suburban Line Automatic Signals Scottish   1936 gs2512  
DS Droitwich Spa Western GW720 1969 S 2609  
DS Dumfries South Scottish   1957 Dumfries  
DT Down Tower (Bescot) Midland   1970 WE1 week 34  
DT Down Through Line Automatic signals Eastern   1933 2718  
DT Down Trowbridge Automatic Signals Western   1969 S2629  
DW Down Westbury Automatic Signals Western GW086 1978 LXO 155  
DW North Camp Southern       1980
DX Down Oxford automatic signals Western   1965 LXO 75  

Code Location Region RailRef From Notice To
E Aldersgate LT MT001 by 1921    
E Willesden Green LT MT030 by 1921    
E East Gate Junction Eastern   1961 51  
E East Linton Scottish   1976 Dunbar 1977
E Eastgate Junction Eastern GE230 1958 3395  
E Eastleigh PSB Southern SW070 1980 59 SWD  
E Edinburgh SC, Edinburgh Scottish NB001 1976 Edinburgh  
E Elderslie No.1 Scottish   1966 Paisley 1985
E Elvanfoot Scottish   1972 Summit  
E Exeter PSB Western GW250 1985 10  
E Leeds East Eastern   1937 7  
E London Bridge Southern SE001 1928 20  
E Northallerton East Eastern   1939 22  
E Waverley East Scottish NB001 1938 gs2578  
E Willesden Green LT MT030 by 1921    
EA Edinburgh SC, Prestonpans Scottish NB001 1977 Prestonpans  
EB Eastbourne Southern LB122 1991 2 2015
EB Edinburgh SC, Ladybank Scottish NB001 1980 Ladybank  
EB Factory Junction Southern SE101 1959 1 SED  
EB Ladybank Junction Scottish   1980 Markinch 1980
EBE Minster Southern SE060 1960 11 SED  
EBF Grove Junction Southern SE041 1957 1  
EBG Wadhurst Southern SE041 1957 1  
EBH Stonegate Southern SE041 1957 1  
EBJ Cuxton Road Southern SE120 1959 9 SED  
EBM Mottingham Southern SE028 1962 14 SED  
EBQ Richborough Sidings Southern   1962 P/EW 5 1962  
EBX Maidstone East Southern SE121      
EBZ Deal Southern SE090 1962 P/EW 1 1962  
EC Clapham Junction "B" Southern   1952 2  
EC Edinburgh SC, Cowdenbeath Scottish NB001 1981 Townhill  
ED Epsom Downs Southern   1969 7 CD  
ED Dunbar Scottish   1976 Dunbar  
ED Shepherds Lane Southern SE101 1959 1 SED 1981
EDJ Hawkesbury Street Junction Southern SE120 1980 50 SED  
EE Herne Hill Southern SE101 1959 1 SED 1981
EF Edinburgh SC, Drem Scottish NB001 1977 Drem  
EF Penge East Southern SE101 1959 3 SED  
EG Beckenham Junction Southern SE101 1959 3 SED 1983
EG Edinburgh SC, Grantshouse Scottish NB001 1977 Grantshouse  
EH Edinburgh SC, Haymarket Scottish NB001 1976 Edinburgh  
EH Haymarket Scottish   1975 Haymarket 1976
EH Shortlands Junction Southern SE101 1959 SED 1982
EJ Chislehurst Junction Southern SE001 1962 14 SED 1993
EJ Edinburgh SC, Camps Junction Scottish NB001 1981 Midcalder  
EJ Southall East Junction Western GW060 1953 E13  
EK East Kent SC (located Gillingham) Southern SE120 2011 NR-K-1-2011  
EK Herne Bay Southern SE131 1959 5 SED  
EL Edinburgh SC, Linlithgow Scottish NB001 1978 Winchburgh  
EL Swanley Southern SE120 1959 SED 1983
ELJ East London Junction Eastern GE001 1949 3086  
EM Edinburgh SC, Monktonhall Scottish NB001 1976 Monktonhall  
EM Farningham Road Southern SE120 1959 6 SED 1983
EN Edinburgh SC, Newbridge Scottish NB001 1978 Newbridge  
EN Fawkham Southern SE120 1959 6 SED  
EN London Euston Midland NW001  
EO Edinburgh SC, Charlestown Scottish NB001 1980 Charlestown  
EO Meopham Southern SE120 1959 6 SED  
EP Portobello Scottish   1976 Portobello  
EP Sole Street Southern SE120 1959 6 SED  
EQ Strood Junction Southern SE120 1959 6 SED  
ER Edinburgh SC, Markinch Scottish NB001 1980 Markinch  
ER Rochester Southern SE120 1959 6 SED  
ES Edinburgh SC, Slateford Scottish NB001 1981 Slateford  
ES Engine Shed Junction Western GW001 1962 LW 50  
ES Engine Shed Junction Western MR280 1967 S 2504  
ES Gillingham "A" Southern SE120 1959 6 SED  
ES Southall East Station Western GW060 1953 E13  
ET Edinburgh SC, Thornton Scottish NB001 1980 Thornton  
ET Enfield Town Eastern   1960 3499  
ET Gillingham Southern SE120 1973 38 SED  
ET Gillingham "B" Southern SE120 1959 6 SED  
EU Edinburgh SC, Burntisland Scottish NB001 1979 Burntisland  
EU Rainham Southern SE120 1959 4 SED  
EV Edinburgh SC, Inverkeithing Scottish NB001 1979 Inverkeithing  
EV Sittingbourne Southern SE120 1959 7 SED  
EW Edinburgh SC, Winchburgh Scottish NB001 1978 Winchburgh  
EW Haslemere Southern SW020 1937 35  
EX Teynham Southern SE120 1959 7 SED  
EY Edinburgh SC, Dalmeny Scottish NB001 1979 Dalmeny  
EY Faversham Southern SE120 1959 7 SED 2011
EZ Graveney Crossing Southern SE120 1959 7 SED  

Code Location Region RailRef From Notice To
F Ascot Southern SW050 1974 47 SWD 1974
F Bricklayers Arms Junction Southern LB040 1928 20  
F Feltham PSB Southern SW030 1974 48 SWD  
F Fenchurch Street Eastern   1961 200  
F Fobbing Crossing Eastern   1961 300  
F Forest Gate Junction Eastern   1949 3102  
F Moorgate Street LT MT001 by 1921    
F Neasden LT MT030 by 1921    
F Old Kew Junction Southern SW033 1974 46 SWD 1974
FB New Fishbourne Crossing Southern        
FC Fishbourne Crossing Southern LB090 1985 5  
FC Streatham Hill Southern   1952 2  
FE Westgate-on-Sea Southern SE131 1959 5 SED  
FG Forest Gate Junction Eastern GE001 1949 3101  
FH Fareham Southern SW072 1973 42 SWD 1982
FJ Fiskerton Junction Midland MR610     2016
FJ Fork Junction Eastern GE180 1967 Stratford  
FR Queens Park LUL NW066 1988 120E  
FS Fenny Stratford Midland NW140     2004
FS Fiskerton Station Midland MR610     2016
FW Ash Crossing Southern   1980 58 SWD  

Code Location Region RailRef From Notice To
G Galashiels Scottish   1937 gs2521 1969
G Garriongill Junction Scottish   1972 Motherwell 1973
G Geneva Eastern   1939 11  
G Glasgow Central PSB Scottish   1960 Glasgow  
G Glencraig Junction Scottish   1981 Townhill  
G Gloucester PSB Western GW370 1968 S 2569  
G Goodmayes Eastern GE001 1949 3096  
G Goswick North Eastern NE740 1960 15A  
G Grays Eastern MR050 1961 34  
G Greskine Scottish   1972 Beattock  
G Liverpool Street LT MT001 by 1921    
G Wembley Park LT MT030 by 1921    
GB Guide Bridge Midland GC370 1984 225E  
GB Richmond Southern SW030 1980 61 SWD  
GC Tulse Hill Southern   1952 2  
GD Garngad Scottish   1960 Sighthill  
GD Godstone Southern        
GE Greenford Western GW040 1994 GWS 3  
GE Margate Southern       2011
GF Gas Factory Junction Eastern   1950 RR409  
GG Goring-by-Sea Southern LB090 1988 1 1988
GH Grangemouth Junction Scottish   1979 Bo'ness  
GJ Gorton Junction Midland GC370 1984 100E 1984
GJ Greenhill Junction Scottish   1975 Greenhill  
GJ Greenhill Upper Junction Scottish   1971 Cadder - Greenhill 1975
GK Gourock Scottish   1966 Gourock  
GL Greenhill Lower Junction Scottish   1971 Cadder - Greenhill 1975
GN East Midlands ROC, Grantham - Nottingham Eastern   2015 NR-LNE-40  
GN Grantham North Eastern   1937 RR279  
GP Gidea Park Eastern   1933 2718  
GS Gartsherrie South Junction Scottish   1973 Motherwell 8  
GS Golborne Station Midland   1972 1201G 1972
GW Aldershot Junction North Southern     33 SWD 1970
GW Grays West Eastern MR050 1961 31/32 1961
GW Greenock West Scottish   1966 Gourock  

Code Location Region RailRef From Notice To
H Aldgate LT MT001 by 1921    
H Harrow South Junction LT MT030 by 1921    
H Hayes & Harlington Western GW060 1953 E13  
H Birkenhead Park Midland WI001 1977 500G  
H Hilton Junction Scottish   1980 Ladybank  
H Holborn Viaduct Southern SE106 1931 Drivers &c 1935  
H Holytown Junction Scottish   1973 Motherwell 5 1973
H Hump signals, Perth Yard Scottish   1961 Perth Yard  
H Hump signals, Millerhill Down Yard Scottish   1963 Millerhill Down  
H Hungerford Western GW086 1978 LXO 161  
H Hunterston Scottish   1986 Hunterston  
H Hurlford Scottish   1976 Kilmarnock  
H Hyndland Scottish   1979 Clyderail 1989
H1 East Ham No.1 LMSR MR030 1928 Bow-Barking  
H2 East Ham No.2 LMSR MR030 1928 Bow-Barking  
HA Harlow Mill Eastern   1960 3549  
HB Hebden Bridge Midland   1972 1202G  
HB Highbridge Crossing Western GW170 1972 S 2694 1972
HC Battersea Park Junction Southern   1938 45 1979
HC Helensburgh Scottish   1960 Craigendoran  
HC Hump Cabin, Ripple Lane Eastern   1961 9  
HD Hackney Downs Eastern GE020 1950 RR409 2001
HD Harlesden LMSR NW066 1932 New Line  
HE Hatch End LMSR NW066 1932 New Line 1983
HE Hertford East Eastern GE027 1960 3468  
HE Ramsgate Southern       2011
HF Hyndland, Finnieston Scottish   1979 Clyderail  
HG Hardengreen Junction Scottish   1962 Millerhill  
HK Heatheryknowe Scottish   1960 Sunnyside 1991
HL Hanwell Western GW060 1953 E13  
HL Headstone Lane LMSR NW066 1932 New Line  
HL Hullavington Western GW120 1967 S 2517  
HL Willesden High Level Midland   1988 120E  
HM Healey Mills Eastern   1993 RRNE 1  
HM High Meads Eastern GE190 1958 3341  
HR Harrow LMSR NW066 1932 New Line  
HS High Street Junction Scottish NB350 1960 High Street 1989
HS Watford High Street LMSR NW066 1933 New Line 1970
HU Huddersfield Eastern   1993 RRNE 1  
HV Hove Southern LB090 1984 2 1985
HW Ash Vale Junction Southern   1970 33 SWD  
HY Hyndland Scottish   1960 Hyndland 1979

Code Location Region RailRef From Notice To
I Ingatestone Eastern   1937 2849  
I Inverness SC Scottish HR020 1987 Inverness 2  
IC Ilford Car Sheds Eastern GE001 1949 3100  
IR Immingham Reception Sidings Eastern GC154 1967 Immingham  
IS Ilford Station Eastern GE001 1949 3100  
IW Immingham West Eastern   2015 NR-LNE-41  

Code Location Region RailRef From Notice To
J Blackfriars Southern SE106 1946 23 1982
J High Street LT MT005 by 1921    
J Kings Cross LT MT001 by 1921    
JC Jetty Ground Frame Eastern   1961 26  
JC Norwood Junction Southern   1954 1 1984
JC Norwood Junction North Southern   1950 1 1954
JS James Street Midland MY002 1977 500G  

Code Location Region RailRef From Notice To
K Gloucester Road LT MT005 by 1921    
K Kelvinhaugh Scottish NB370 1960 High Street 1979
K Kilmarnock Scottish   1976 Kilmarnock  
K Kilnhurst West South Eastern MR840 1965 Aldwarke  
K Kingsknowe Scottish   1981 Slateford  
K Kintbury Western GW086 1978 LXO 161  
K Kirkcaldy Scottish   1979 Burntisland  
K North Kent East Junction Southern SE001 1929 Drivers &c 1935  
KB Kilburn LMSR NW066 1932 New Line  
KC Penge West Southern   1950 1  
KE Kew East Junction Midland   1974 46 SWD  
KE Kirkdale East Midland LY160 1977 500G  
KG Kensal Green LMSR NW066 1932 New Line  
KS Kensington South Main Western     37 CD  
KW Havant Southern LB090 1938 18  

Code Location Region RailRef From Notice To
L Ladybank Junction Scottish   1980?   1980
L Liverpool Street Eastern   1949 3106  
L Liverpool Street IECC Eastern   1989 Anglia No.1  
L Lockerbie Scottish   1971 Loockerbie  
L London Bridge IECC SE001   1978 18 CD  
L Longannet Scottish   1980 Charlestown  
L Low Street Eastern MR053 1961 300  
L St Johns Southern SE001 1929 22  
L South Kensington LT MT005 by 1921    
L1 Little Ilford No.1 LMSR MR030 1928 Bow-Barking  
L2 Little Ilford No.2 LMSR MR030 1928 Bow-Barking  
LC Forest Hill Southern   1950 1  
LG Labroke Grove Western GW001 1962 LW 50  
LG Lancing Southern LB090 1988 1  
LH Littlehampton Southern LB092   19 CD  
LJ Lansdown Junction Western GW375 1966 S 2499  
LJ Latchmere Junction Southern   1978 16 CD 1983
LJ Llandudno Junction PSB Midland NW460 1980 1650G  
LM Lowdham Midland MR610     2016
LR Manchester London Road Midland NW740 1969 798G  
LW Bedhampton Crossing Southern LB090 1937 30  
LW Lewes Southern   1976 13 CD  
LW Liverpool Street West Eastern GE001 1949 3086  

Code Location Region RailRef From Notice To
M Manchester Central CLC CL041 1935 (not numbered)  
M Markinch Scottish   1980 Thornton 1980
M Marsh Junction Eastern       2015
M Masborough Station North Eastern MR840 1965 Aldwarke  
M Millerhill Scottish   1962 Millerhill 1988
M Millerhill Scottish   1988 Millerhill  
M Milngavie Scottish   1959 Singer 1990
M Morningside Road Scottish   1975 Haymarket  
M Motherwell PSB Scottish   1972 Motherwell  
M Muckingford Crossing Eastern   1961 300  
M Parks Bridge Junction Southern SE001 1929 22  
M Upper Abbey Mills Junction LMSR MR030 1927 Bow-Barking  
M Maindee Main Western   1961 W886 1961
MB Millbrook Southern SW100   11 SWD 1981
MB York ROC, Marsh Junction - Brocklesby Eastern   2015 NR-LNE-41  
MC Malden Crossing Southern SW014     1974
MC Moreton Cutting Western GW080     1965
MC Motherwell PSB Scottish CA140 1981 Midcalder  
MC New Cross Gate Southern   1950 1  
MD Mossend No.4 Scottish CA080 1973 Motherwell 4 1973
ME Maidstone East Southern   1983 60 SED  
ME Marylebone IECC Midland        
ME Mile End Eastern GE001 1949 3086  
ME Morecambe Midland   1972 1202G  
ME Muirend Scottish   1961 Muirend  
MG Magor Western   1961 W886 1961
MH Midhe Hall Midland   1972 1202G  
MJ Mitcham Junction Southern   1969 6 CD 1982
MJ Monktonhall Junction Scottish   1973 Portobello 1976
MJ Muirhouse Junction Scottish   1961 Muirhouse  
MK Monktonhall Junction Scottish   1962 Millerhill 1976
ML Marsh Lane Eastern   1937 7  
ML Marsh Lane Southern SW001 1936 21  
MP Manchester Piccadilly PSB Midland   1993 2000E  
MP Maryhill Park Junction Scottish   1960 Hyndland  
MT Marks Tey Eastern   1961 51  
MT Mount Pleasant Crossing Southern SW070 1975 51 SWD 1981
MU East Usk Western   1961 W886 1961
MW Farlington Junction Southern LB090 1937 30 1968
MW Manton Wood Eastern   1965 C (Thrumpton)  
MW Marchwood Southern SW104   66 SWD  
MY Madeley Midland NW200 1961 706G  
MY Manor Yard Eastern GE190 1958 3341  

Code Location Region RailRef From Notice To
N Blackheath "A" Southern SE021 1929 22 1970
N Newport Western   1961 W886 1961
N Newton Scottish   1960 Newton 1973
N Niddrie West Scottish   1973 Portobello  
N Northallerton Eastern   1939 22  
N Norton Junction Western GW690 1969 S 2609  
NA North Acton Western GW040 1962 LW 50  
NB Norton Bridge Junction Midland NW200 1961 706G  
NB Whitmore Midland NW200 1961 706G  
NC Newark Castle Midland MR610     2016
NC West Croydon "A" Southern   1954 1 1984
ND North Pole International Depot Western GW001 1994 EPS 94/001  
NE Sevenoaks Southern   19 SED  
NF Northfleet Southern   1970 30 SED  
NH Neilston High Scottish   1961 Muirend  
NK Ashford SC North Kent South Zone SE040 2000 RTS 2  
NM Nunnery Main Line Junction Eastern   1965 C (Brightside)  
NN East Midlands SCC Nottingham - Newark LNW MR210 2016 NR LNE 42  
NN Niddrie North Scottish   1962 Millerhill  
NN Norton Midland BJ020 1972 1201G  
NP North Pole Junction Western WL001 1962 LW 50  
NQ Finchley Central Eastern   1940 RR336  
NS Birmingham New Street PSB Midland   1970 WE1 week 34  
NW Cosham Southern   1968 23 SWD 1982
NW North Wembley LMSR NW066 1932 New Line  

Code Location Region RailRef From Notice To
OB Marylebone IECC, Oxford - Bicester Midland NW130 2015 NR-LNW-082  
OD Oxted Southern   1987 1  
OJ Over Junction Western GW380 1968 S 2569 1969
OL Ordsall Lane No.1 Midland NW621 1969 798G  
OO Old Oak Common Western GW001 1971 LXO 122  
OW Green Lanes Crossing Southern   1968 23 SWD 1968

Code Location Region RailRef From Notice To
P Hither Green "A" Southern SE001 1929 22  
P Paisley PSB Scottish   1966 Paisley  
P Parkgate Junction Eastern MR840 1965 Aldwarke  
P Parkhead Scottish NB350 1960 Parkhead  
P Pasture Street Eastern       2015
P Penistone Eastern   1993 RRNE 1  
P Perth Scottish   1962 Perth  
P Pirton Sidings Western MR270 1969 S 2605 1969
P Plaistow LMSR MR030 1927 Bow-Barking  
P Plymouth PSB Western GW270      
P Polmont Scottish   1979 Bo'ness  
P Portobello Scottish   1973 Portobello 1976
P Possilpark Scottish   1956 Cowlairs  
P Prestwick Scottish   1982 Barassie 1985
P Purfleet Eastern MR050 1961 29  
PA Paisley, Ayr Scottish   1985 Glengarnock  
PB Polmont, Bo'ness Scottish   1979 Bo'ness  
PE Millerhill Scottish   1962 Portobello East  
PE Paisley, Elderslie Scottish   1985 Elderslie  
PF Petersfield Southern SW020 1969 27 SWD  
PG Paisley, Glengarnock Scottish   1985 Glengarnock  
PH Parsons Heath Eastern   1961 51  
PH Power House LMSR NW066 1932 New Line 1977
PJ Portobello Junction Western GW001 1962 LW 50  
PJ Pouparts Junction Southern   1938 45 1952
PK Paisley, Kilwinning Scottish   1986 Kilwinning  
PM Phillips Marsh Western GW151 1970 S 2653  
PN Pollockshaws North Scottish   1973 Glasgow Extension 3 1973
PN Preston PSB Midland PR001 1972 1202G  
PO Poole Southern SW100 1988 3  
PR Pyewipe Road Eastern   2015 NR-LNE-41  
PRR Purfleet Rifle Range Eastern MR050 1961 29  
PS Parson Street Western GW150 1970 S 2651  
PW Portsmouth PSB Southern LB140 1968 23 SWD  

Code Location Region RailRef From Notice To
Q Brockley Lane Southern SE113 1929 22  
Q Quintinshill Scottish   1971 Loockerbie  
QC Streatham Junction Southern   1969 6 CD  
QJ Queensferry Junction Scottish   1975 Haymarket 1978
QP Queens Park (No.3) LMSR NW066 1932 New Line 1977
QW Portsmouth Harbour Southern   1937 26 1968

Code Location Region RailRef From Notice To
R is also used as an additional prefix letter to denote a repeater (distant) signal
R Nunhead Southern SE112 1959 1 SED 1982
R Rainham Eastern MR050 1961 29  
R Reading PSB Western GW080 1965 LXO 73  
R Redford Junction Scottish   1980 Thornton 1981
R Repeater Signals LT MT060 by 1921    
R Romford Eastern GE001 1949 3091  
R Ross Junction Scottish   1972 Motherwell 1973
RB Robertsbridge Southern   1985 4  
RC Reading Colthrop Siding Western GW086 1978 LXO 155  
RG Reigate Southern        
RH Redhill "A" Southern   1983 35 CD 1985
RJ Rutherglen Junction Scottish   1973 ? Glasgow Extension  
RL Rainhill Midland   1972 1201G  
RL Ripple Lane Eastern MR050 1961 26  
RM Rawmarsh Eastern MR840 1965 Aldwarke  
RN Retford North Eastern   1965 C (Thrumpton)  
RN Roydon Eastern GE040 1960 3468  
RP Raynes Park Southern SW001 1990 2  
RR Rotherham Road Eastern GC310 1965 Aldwarke  
RW Liss Southern SW020 1974 50 SWD 1974
RY Ribble Yard Midland   1972 1202G  
RY Ripple Lane Yard Eastern MR050 1961 9  

Code Location Region RailRef From Notice To
S Automatic Signals LT MT060 by 1921    
S Immingham NCB Terminal Eastern   1970 7  
S Longannet SSEB Scottish   1969 Longannet  
S Shawfield Scottish   1973 Glasgow Extension 1 1973
S Sheffield PSB Eastern   1992 1 (TLF)  
S Shenfield Eastern   1933 2718  
S Shields Junction No.1 Scottish   1966 Glasgow Extension 1967
S Sighthill Junction Scottish   1956 Cowlairs  
S Slateford Junction Scottish   1975 Haymarket 1981
S Slough Western GW060 1974 LXO 134  
S Southcote Junction Western   1964 1 SWD 1965
S Stanford-le-Hope Eastern   1961 300  
S Stanway Eastern   1960 3610  
S Stewarts Lane Southern   1978 16 CD  
S Stratford Eastern GE001 1949 3104  
S Summit Scottish   1972 Summit  
S Surbiton PSB Southern SW001 1970 30 SWD  
S Swanwick Southern SW076   59 SWD 1980
S Swinton Town Station Eastern MR840 1965 Aldwarke  
S4 Sheffield Victoria No.4 Eastern   1965 C (Sheffield)  
SA St Andrews Junction Western GW142 1994 GWS 1  
SB Smithy Bridge Midland   1972 1202G  
SB Thames Valley ROC, Didcot workstation Western   2015 NR-GW-38  
SC Streatham Common Southern   1936 5  
SD Smeafield North Eastern NE740 1960 15A  
SD Southend Eastern   1938 2893  
SD Sunningdale Southern SW050 1974 47 SWD 1974
SD5 Stafford No.5 Midland   1970 WE1 week 34  
SE Stalybridge Midland NW810 1984 225E  
SE Stratford Eastern Eastern GE001 1949 3102 1949
SG St Germains Crossing Scottish   1977 Prestonpans 1977
SG Singer Scottish   1959 Singer 1989
SG Slade Green South Zone SE020 1992 14  
SH Shettleston Scottish   1960 Shettleston 1991
SH Shepherds Well Southern       2011
SH South Hampstead LMSR NW066 1933 New Line 1970
SJ Selhurst Junction Southern   1952 1 1954
SJ Shirebrook Junction Midland   1991 photograph  
SJ Standish Junction Midland   1972 1201G  
SJ Standish Junction Western MR290 1968 S 2591  
SJ Strathbungo Junction Scottish   1961 Muirhouse  
SJ Sunnyside Junction Scottish   1960 Sunnyside 1991
SK Salwick No.2 Midland   1972 1202G  
SK Seven Kings Eastern GE001 1949 3096 1949
SK South Kenton LMSR NW066 1932 New Line  
SM St Margarets Eastern GE027 1960 3468  
SN Scremerston North Eastern NE740 1960 15A  
SN Sheffield North Junction Eastern   1965 C (Brightside)  
SN Slough IECC Western GW060 1992 57  
SN Swindon "A" PSB Western GW110 1968 S 2577  
SN Thames Valley ROC, former Slough IECC area Western   2015 NR-GW-39  
SP Spellbrook Eastern   1960 3549  
SP Stonebridge Park LMSR NW066 1932 New Line  
SR Stapleton Road Western GW130 1970 S 2649  
SR Strand Road Midland   1972 1202G  
SS Seven Sisters Eastern   1960 3499  
ST Steventon Western GW080     1965
SU Sutton Southern   1969 6 CD 1982
SX Staythorpe Crossing Midland MR610     2016
SW Sawbridgeworth Eastern   1960 3549  
SW Stratford Western Eastern GE001 1949 3098 1949
SW Thames Valley ROC, Swindon workstation Western   2015 NR-GW-38  
SY Barnt Green Midland MR270 1969 S 2617  
SY Salisbury PSB Southern SW120 1981 63 SWD  
SY Saltley PSB Midland   1993 50e  

Code Location Region RailRef From Notice To
T Cambria Junction Southern SE112 1959 1 SED  
T Thingley Junction Western GW110 1966 S 2501  
T Thorpe-le-Soken Eastern GE230 1959 3424  
T Thrumpton Eastern   1965 C (Thrumpton)  
T Thryburgh Junction Eastern GC310 1965 Aldwarke  
T Tilbury Riverside Eastern MR050 1961 38  
TTilehurstWesternGW080  1965
T Trimley Eastern   1970 E 17  
T Tweedmouth Scottish   1977 Grantshouse  
T Three Bridges IECC Southern   1982 28 CD  
T Totnes Western GW270      
TB Trowse Swing Bridge Eastern   2000 RT-EA-02  
TC Peckham Rye "C" Southern   1962 P/EW 47 CD  
TC Tattenham Corner Southern   1970 8 CD 1983
TE Temple Mills East Eastern GE190 1958 3341  
TH Thames Haven Junction Eastern   1961 300  
TJ Terminus Junction Scottish   1967 Glasgow Extension  
TJ Trent Junction Eastern   1964 C (West Burton)  
TP Trafford Park Junction Midland CL050 1969 798G  
TJ Tuffley Junction Western GW370 1968 S 2569 1968
TS Tweedmouth South North Eastern NE740 1960 15A  
TTN Tilbury Town North Eastern   1961 34  
TV Lichfield Trent Valley Junction Midland   1992 130e  
TW Farnborough Southern SW060 1966 9 SWD 1966
TW Temple Mills West Eastern GE190 1958 3341  
TX Thorington Crossing Eastern GE231 1958 3395  
TY Tinsley Yard Eastern   1992 1 (TLF)  

Code Location Region RailRef From Notice To
U East Usk Western   1961 W886 1961
U Loughborough Junction Southern SE106 1959 1 SED 1981
U Uddingston Junction Scottish   1960 Newton  
U Up Line Automatic Signals Eastern   1928 o1817  
U Upton Park LMSR MR030 1927 Bow-Barking  
UA Up Avoiding Line Automatic Signals Western   1968 S 2569  
UB Up Badminton Line Automatic Signals Western GW120 1967 S 2517  
UB Up Branch Automatic Signals Western   1969 S 2629  
UC Up Carriage Line Automatic Signals Western   1992 55  
UC Up Charfield Line Automatic Signals Western MR340 1968 S 2583  
UC Up Chingford Line Automatic Signals Eastern   1960 3499  
UC Up Clapton Line Automatic Eastern GE020 1935 2769  
UD Up Departure Midland CA009 1985 25E  
UE Ashford Southern     SED  
UE Up Local Line Automatic Signals Eastern GE001 1949 30891  
UE Up Through Line Automatic Signals Eastern GE001 1949 3086  
UF Uffington Western GW110 1965 LXO 77  
UF Up Fast Line Automatic Signals Eastern   1960 3499  
UG Up Goods automatic signals Western   1965 LXO 75  
UJ Ulceby Junction Eastern       2015
UK Up Kemble Line automatic signals Western   1970 S 2668  
UL Up Local Line Automatic Signals Eastern   1933 2718  
UM Up Local Line Automatic Signals Eastern GE001 1949 3086  
UM Up Main Line automatic signals Western   1965 LXO 73  
UM Up Through Line Automatic Signals Eastern GE001 1949 30891  
UM Upminster Eastern   1961 200  
UR Up Relief Line automatic signals Western   1965 LXO 73  
US Up Slow Line Automatic Signals Eastern   1960 3499  
US Up Southend Line Automatic Signals Eastern   1933 2718  
US Up Suburban Line Automatic Signals Eastern GE001 1949 3086  
US Up Suburban Line Automatic Signals Scottish   1936 gs2512  
UT Up Through Line Automatic Signals Eastern   1933 2718  
UT Up Tower Midland CA009 1985 25E 1985
UT Up Trowbridge Automatic Signals Western   1969 S2629  
UW Frimley Junction Southern SW056   41 SWD 1973
UW Up Westbury Automatic Signals Western GW086 1978 LXO 155  
UX Up Oxford automatic signals Western   1965 LXO 75  

Code Location Region RailRef From Notice To
V Inverkeithing Central Junction Scottish   1979 Dalmeny 1979
VC Victoria Central Southern   1939 23  
VC Victoria IECC (Central section area) Southern   1979 18 CD  
VE Manchester Victoria East Midland   1993 110E  
VP Victoria Park Eastern NW040 1967 Stratford  
VS Victoria IECC Southern   1979 25 CD  
VS Victoria South Southern   1938 45 1939

Code Location Region RailRef From Notice To
W Leeds West Eastern   1937 7  
W Walworth Coal Sidings Southern SE106 1926    
W Waterloo Southern SW001 1984 72 SWD 1990
W Waverley West Scottish   1936 gs2512 1976
W West Ham LMSR MR030 1927 Bow-Barking  
W Westbury PSB Western   1979 57 SWD  
W Westerton Scottish   1959 Singer 1990
W Wickford Junction Eastern   1938 2882 1993
W Wimbledon IECC Southern SW001 1990 2  
W Winchburgh Junction Scottish   1978 Newbridge 1978
W Wincobank Station Junction Eastern   1965 C (Brightside)  
W Wishaw Central Scottish   1972 Motherwell 1973
W Witham Eastern   1961 29  
W Wivenhoe Eastern GE230 1958 3395  
W Woodburn Junction Eastern   1992 1 (TLF)  
WA Ware Eastern GE027 1960 3468  
WA Western section automatic signals Southern   1936 18  
WB Waterloo Southern SW001 1936 36 1984
WB Wembley LMSR NW066 1932 New Line  
WB West Burton PSB Eastern   1964 C (West Burton)  
WB West Midlands SCC Worcester Branch LNW MR250 2016 NR LNW 87  
WBB Clapham Junction "C" Southern SW030 1959 2  
WBC Bramley Southern   1964 1 SWD  
WBD Point Pleasant Junction Southern SW030 1959 2 1990
WBE East Putney Southern SW032 1970 35 SWD 1991
WBF Wimbledon Park Southern SW032 1970 36 SWD 1991
WBG Richmond Southern SW030 1940 1  
WBM Gunnersbury Southern SW035     1980
WBO Barnes Southern SW030 1959 2  
WBP White Hart Crossing Southern SW030 1959 2  
WBQ Mortlake Southern SW030 1959 2  
WBR North Sheen Southern SW030 1959 2 1974
WBV Halterworth Crossing Southern SW126 1972 38 SWD  
WBW Romsey Southern SW126 1972 38 SWD 1982
WBX Redbridge Southern SW100   65 SWD 1982
WC West Calder Scottish   1981 Fauldhouse 1981
WC West Croydon "B" Southern   1972 10 CD  
WC Loco Junction Southern SW001 1936 18  
WD Queens Road Southern SW001 1936 18 1990
WDM Walton-on-Thames Southern SW001 1970 30 SWD 1970
WDN St Denys Southern SW070 1966 10 SWD 1981
WDQ Northam Junction Southern SW070 1966 11 SWD 1981
WDS Southampton Central Southern SW100 1966 11 SWD 1981
WDU Totton Southern SW100 1966 12 SWD 1982
WDV Brockenhurst "A" Southern SW100 1966 12 SWD 1978
WDX Lymington Junction Southern SW100 1967 19 SWD 1978
WDY Christchurch Southern SW100 1967 19 SWD 1972
WDZ Pokesdown Southern SW100 1966 17 SWD 1972
WE West London Junction Southern SW001 1936 18 1990
WF Clapham Junction "A" Southern SW001 1936 18 1990
WF Watford Junction LMSR NW066 1933 New Line 1967
WFB Bournemouth Central Southern SW100 1966 17 SWD  
WFD Southampton Tunnel Junction Southern SW100 1964 P/EW 43 SWD 1966
WFH Virginia Water Southern SW050 1970 29 SWD 1974
WFK Earley Southern SE080 1965 LXO 79 1973
WFN Andover "A" Southern SW120 1967 18 SWD 1973
WFO Andover "B" Southern SW120 1968 24 SWD 1973
WFP Ryde St Johns Road Southern   1967 20 SWD  
WFQ Salisbury Tunnel Junction Southern SW120 1968 24 SWD 1981
WFW Dorchester Junction Southern GW223 1970 31 SWD  
WG Earlsfield Southern SW001 1936 18  
WG Putney Bridge Southern MD014 1970 35 SWD  
WH Wimbledon "A" Southern SW001 1936 18 1991
WH West Hampstead PSB Midland   1988 2  
WJ Southall West Junction Western GW060 1953 E13  
WJ Watford Junction PSB Midland   1964 525G  
WJ Wimbledon "B" Southern   1936 18 1982
WJ Woodburn Junction Eastern   1965 C (Sheffield)  
WJ Woodley Junction Midland CL002 1984 225E  
WJ Wrawby Junction Eastern       2015
WK Turnham Green Southern SW035 1980 61 SWD  
WK Wimbledon "C" Southern   1936 18  
WL Charlton Lane Crossing Southern   1970 28 SED  
WL Raynes Park Junction Southern SW001 1936 18  
WL Willesden New LMSR NW066 1965 New Line 1988
WL Wood Lane Crossing Southern SW033 1974 46 SWD 1974
WM Malden Junction Southern SW001 1936 18  
WM Wokingham Southern SE080 1973 40 SWD  
WM Wembley Main Line SCC Midland   2000 SA-06-MZ  
WN Surbiton Southern SW001 1936 21 1970
WN Warrington PSB Midland   1972 1201G  
WN Whifflet North Junction Scottish   1973 Motherwell 5  
WN Willesden New LMSR NW066 1932 New Line 1965
WN Willesden PSB Midland   1970 WE1 week 34  
WN Wilton (former Wilton South) Southern SW140 1973 43 SWD  
WO Waterloo Southern SW001 1990 3 1991
WP Hampton Court Junction Southern SW001 1936 21  
WP Woodgrange Park Eastern   1961 200  
WR Wantage Road Western GW110 1965 LXO 77 1965
WR Warwick Road Midland MA002 1969 798G  
WS Southall West Station Western GW060 1953 E13  
WS Wembley SCC Midland NW066 2005    
WS Willesden Suburban Midland NW066 1988 120E 2005
WS Wilton South Southern SW140   43 SWD 1973
WT Motspur Park Southern SW012 1966 7 SWD  
WT West Thurrock Junction Eastern MR050 1961 31/32  
WT Witham Western GW190 1984 4 1984
WU West Byfleet Southern SW001 1969 26 SWD 1970
WV Woking Southern SW001 1937 28  
WW Effingham Junction Southern SW016 1965 3 SWD 1969
WW Westerleigh West Western   1971 S 2680 1971
WW Wigan Wallgate Midland   1972 1201G  
WW Worplesdon Southern SW020 1937 28  
WX Guildford PSB Southern SW020 1966 8 SWD  
WX Guildford Yard Southern SW020 1937 28 1966
WY Guildford South Southern SW020 1937 2 1966
WY Shalford Southern SE073 1966 8 SWD  
WY Wembley Yard Midland   1993 6 (TLF)  
WY Wormley Eastern   1960 3549  
WY Wylye Southern   1973 43 SWD  
WZ Farncombe Southern SW020 1965 5 SWD  

Code Location Region RailRef From Notice To
X Sidcup Southern SE028 1962 14 SED  

Code Location Region RailRef From Notice To
Y Bellingham Southern SE112 1959 2 SED  
Y Yate South South Junction Western MR340 1969 S 2632  
YC Yoker IECC, Craigendoran Scottish   1991 Yoker 9  
YD Yoker IECC, Dumbarton Scottish   1991 Yoker 9  
YF Yoker IECC, Finnieston Scottish   1989 Yoker 3  
YH Yoker IECC, Hyndland Scottish   1989 Yoker 2  
YP Yeovil Pen Mill Western GW220 1985 6  
YS Yate South Western   1970 S 2640 1971
YS Yoker IECC, Shettleston Scottish   1991 Yoker 8  
YW Basingstoke "A" Southern SW060 1966 13 SWD 1966
YW Basingstoke PSB Southern SW060 1966 16 SWD  
YWD Basingstoke PSB (Ground Frame "D" at Overton) Southern SW120 1973 44 SWD  
YWF Basingstoke PSB (Ground Frame "F" at Andover) Southern SW120 1973 44 SWD  
YY Yoker IECC, Yoker Scottish   1989 Yoker 1  

Code Location Region RailRef From Notice To
Z Bromley North Southern   1962 14 SED  
ZE Folkestone Junction Southern   1960 P/EW 11 SED  
ZW Eastleigh PSB Southern   1966 14 SWD  

 



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