Signal box prefix codes

A (hopefully) comprehensive listing

'Boxes beginning H

Last update 17 June 2025

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
H Haborough MAC3101m 13ch 17 September 1988 Ulceby Junction (UJ)
SC Hackbridge BTH1 12 August 1928 12 October 1969 Victoria Signalling Centre (VC)
HD Hackney Downs North Junction BGK3m 04ch 1872 28 May 1960 Hackney Downs [new] (H)
D Down line automatic signals
DC Down Chingford line automatic signals
DF Down fast line automatic signals
DS Down suburban line automatic signals
U Up line automatic signals
UC Up Chingford line automatic signals
UF Up fast line automatic signals
US Up suburban line automatic signals
H Hackney Downs [new] BGK3m 02ch 28 May 1960 25 May 2001 Liverpool Street [new] (L)
HD Code reported but unclear whether used
D Down line automatic signals
DF Down fast line automatic signals
U Up line automatic signals
UC Up Chingford line automatic signals
UF Up fast line automatic signals
HC Hademore Crossing LEC2113m 40ch 1899 18 March 2007 Lichfield Trent Valley Low Level (LD)
HD Hadfield HAJ12m 61ch 1 March 1964 7 December 1984 Dinting (DG)
HE Hadfield East HAJ12m 62ch 1896 1 March 1964 Hadfield (HD)
HW Hadfield West HAJ12m 47ch ≈1881 1 March 1964 Hadfield (HD)
Hagside LC MVB38m 34ch 16 March 1980 17 August 1991 Line transferred to Manchester Metrolink
LP Hainault Loop Exact name and location unknown
Hale CDM28m 36ch ≈1875 22 July 1991 Deansgate Junction (DJ)
Halewood East Junction WJL2?
Halewood West Junction WJL2?
H Halifax Named Halifax East to 30 March 1969 MRB32m 30ch 1884 20 October 2018✖last train; official closure 23 October 2018 York Rail Operating Centre (MM)
HX Unclear if code carried
R Banner repeater signals
Halifax East See Halifax
D Halifax Junction Down direction automatic signals LTN168m 04ch 1876 22 August 1970 Ipswich Station (IS)
HD Hall Dene At least one signal LEN385m 23ch 1905 6 November 2010 Seaham (S)
H Code not confirmed
HM Hallen Marsh AMB14m 41ch 11 February 1917 23 January 1988 St Andrews Junction [Bristol] (SA)
DA Down Avonmouth line automatic signals
HG Hall Green TSB1m 22ch 9 December 1907 12 August 1984 Saltley (SY)
Halling Down line IBH for Rugby Sidings? PWS235m 18ch 1 March 1890 6 February 1972 Cuxton (CX)
HL Hall Lane Believed code not carried DUH191m 57ch 1886 5 August 1979✖delayed from 27 March 1979? Hammerton Street (HS)
HR Hall Road Downgraded to gate box 15 May 1994 HXS37m 10ch 1878 5 June 1994 Merseyrail (ML)
WBV Halterworth Crossing ECR79m 25ch Eastleigh [new] (E)
HN Halton Junction WJL1179m 20ch 1897 early on 5 May 2018✖last train; official closure 9 May 2018 Manchester Rail Operating Centre (WE)
R Distant signals
HW Haltwhistle NEC237m 13ch ≈1915 23 May 1993 Haltwhistle [new] (HW)
H Code used on at least one signal (later changed to HW)
also had draw-ahead signals lettered A to E with no number in bunker siding, used from 17 August 1991
HW Haltwhistle [new] NEC237m 20ch 30 May 1993
B Bunker line signals
also had draw-ahead signals lettered A to E with no number in bunker siding
H Hamilton Engine Sheds HMN1? 17 November 1896 26 August 1973 Motherwell (M)
H Hamilton Square CWK1 28 October 1923? 7 May 1977 James Street [new] (JS)
S Automatic signals
D Code shown on 1934 plan
RD Repeater signals. Code shown on 1934 plan
H Hammerton HAY1≈8m 63ch ≈1980 Hammerton [new] (H)
H Hammerton [new] HAY18m 63ch ≈1980
Hammerton Road Gate box: line controlled by Hammerton (H) HAY19m 17ch
HS Hammerton Street LBE4191m 19ch 1882 16 September 1979 Mill Lane Junction (M)
CDB Hampden Park Demolished 14 February 2015 KJE321m 71ch 1888 late on 13 February 2015✖delayed from 22 November 2013 Three Bridges Rail Operating Centre (TEB)
HR Hampstead Road Junction CRC15m 23ch CRC25m 23ch Euston (EN)
WP Hampton Court Junction BML113m 30ch 28 June 1936 1 March 1970 Surbiton [new] (S)
HH Hams Hall National Distribution Park DBP333m 05ch 7 July 1997
HW Hamworthy Junction BML2115m 72ch 1893 19 May 2014 Basingstoke Signalling Control Centre (PW)
HS Handforth Sidings Shunt frame CMP1 29 June 1959 Wilmslow (WW)
H Handsworth Colliery MAC344m 29ch July 1900 10 November 1971 Orgreaves Colliery (OC)
HH Handsworth Junction PBJ 2 July 1966 Birmingham New Street (NS)
NS Temporary code until taken over by Birmingham New Street
W Code shown in 1956 notice
HL Hanwell MLN17m 24ch 1898 20 March 1955 West Ealing (WE)
HG Hardengreen Junction Line closed?
HP Hare Park DOL1171m 72ch October 1886 28 November 1970 Wakefield Westgate North (WN)
HT Harlescott Crossing All signals seen in photographs. Demolished 22 August 2015 SYC30m 30ch 1882 12 October 2013 South Wales Control Centre (SC)
HC Unclear whether code used
HX Unclear whether code used
HD Harlesden CWJ6m 02ch 10 December 1988 Willesden Suburban (WS)
RHD Repeater signals
HR Harling Road ETN101m 39ch 1883 2 December 2012 Cambridge (EN)
HA Harlow Mill BGK24m 34ch 24 July 1960 29 October 2003 Liverpool Street [new] (L)
D Down line automatic signals
RD Repeater to down line automatic signals
RHA Repeater to controlled signals
U Up line automatic signals
Harrietsham SBJ47m 36ch 5 November 1972 Maidstone East (EBX)
HP Harringay Park Junction TAH14m 15ch 8 February 1959 16 November 2009 South Tottenham Station Junction (S)
H Unclear whether code used
HW Harringay West Station ECM1 4 August 1973 Finsbury Park No 5 (F5)
HG Harringay West Up Goods ECM1 7 December 1974 Finsbury Park (FP)?
HH Harringworth Now preserved on Northampton & Lamport Railway GSM184m 79ch 1928 9 March 1996 Manton Junction (MJ)
HC Harrison & Camms Sidings 27 July 1975 Holmes Junction (HJ)
H Harrogate Formerly named Harrogate North Code used from renaming HAY220m 31ch 1947
HN Code used when named Harrogate North
LH Leeds to Harrogate section. Code used from 29 October 2012
Harrogate North See Harrogate
HS Harrogate South HAY2 20 June 1981 Harrogate North (HN)
HR Harrow No 2 CWJ11m 24ch 10 December 1988 Willesden Suburban (WS)
RHR Repeater signals
HB Hartburn LEN3≈59m 10ch 3 June 1928? November 1973 Bowesfield (B)
also had a signal lettered B with no number
HJ Hartford Junction CGJ1170m 55ch 1925 14 September 1997 Winsford (WD)
HY Hartlebury OWW131m 73ch 24 June 1876✖inspection date 28 August 2012 West Midlands Signalling Centre (DR)
H Harton JAW2?≈5m 30ch 30 March 1982 Line transferred to Metro
H Harwich MAH70m 63ch 1882 1 December 1985 Parkeston [temporary panel] (P)
H Harworth Colliery HAC15m 00ch 1983 Maltby Colliery (MC)
B Bunker line signals
also had draw-ahead signals lettered A to E with no number
EW Haslemere Code used from 18 July 1937 WPH142m 79ch 1895 November 2025 (planned) Basingstoke Rail Operating Centre (BEP) (planned)
CE Hassocks VTB343m 55ch 25 May 1913 8 August 1982 Keymer Crossing (CG)
CA Automatic signals
EDL Hastings ATH82m 26ch TTH62m 43ch 1930
HE Hatch End CWJ13m 17ch 10 December 1988 Willesden Suburban (WS)
RHE Repeater signals
H Hatfield Named Hatfield No 2 to 20 May 1973 ECM117m 68ch 1895 3 March 1974 Kings Cross (K)
H2 Code when named Hatfield No 2
R2 Banner repeater signals
H1 Hatfield No 1 ECM117m 43ch 1891 19 May 1973 Hatfield (H)
Hatfield No 2 See Hatfield
H3 Hatfield No 3 Code assumed: may not have been carried ECM117m 65ch ≈1890 20 December 1969 Hatfield No 2 (H2)
HN Hatton North Code used from 13 October 1957 DCL112m 51ch 30 June 1897 1 September 1969 Saltley (SY)
HJ Haughley Junction LTN183m 15ch by 1893 21 July 1985 Colchester [new] (CO)
Haughton Disused from 1991? Permanently switched out 6 March 1994. Signals removed 11 March 1994 WSJ2183m 26ch November 1900 ≈27 May 1995 Gobowen North (GN)
KW Havant Named Havant Junction to 1 May 1938 WPH237m 28ch 1876 29 October 2007 Havant Area Signalling Centre (HT)
WA Automatic signals
DWA Distant to automatic signals
HT Havant Area Signalling Centre WPH2≈37m 28ch 29 October 2007
Havant Junction See Havant
H Havenhouse Unknown whether code carried GRS46m 00ch August 1899 18 March 1989 Wainfleet (W)
- Havensmouth Gate box: line controlled by Pevensey (CCV) WJB26m 00ch 21 September 2013 Havensmouth [new]
- Havensmouth [New] Gate box: line controlled by Pevensey (CCV). Accommodation moved to crossing north east corner. WJB26m 00ch 21 September 2013 late on 13 February 2015✖delayed from 22 November 2013 Three Bridges Rail Operating Centre (TEB)
H Hawkeridge Code used by 6 November 1955 WEY109m 19ch 14 July 1942 11 May 1984 Westbury [new] (W)
HL Hawkesbury Lane CNN4m 70ch 1896 26 May 2009 Rugby Signalling Control Centre (CN)
EDJ Hawkesbury Street Junction FDM77m 72ch 1934 12 April 1998 Folkestone East (YE)
HL Hawkins Lane DBP1≈10m 20ch 8 December 1929 2 February 1966 Derby (DY)
Haxby Downgraded to gate box 5 December 1965. Demolished 28 February 1988 YMS4m 18ch 28 February 1988 Strensall (S)
Haxby Road YMS3m 27ch 5? February 1989 Strensall (S)
HB Haydon Bridge NEC228m 35ch 1877
H Hayes & Harlington Code used by July 1955 MLN110m 67ch December 1912 10 June 1968 Old Oak Common [new panel] (OO)
HL Hay Lane Code used by 30 October 1953 MLN180m 00ch 1 June 1941 23 March 1968 Swindon (SN)
EH Haymarket [temporary panel] EGM21m 51ch 15 December 1975 3 October 1976 Edinburgh (EH)
HC Haymarket Central Junction ECN21m 48ch EGM245m 53ch 7 October 1894 15 December 1975 Haymarket [temporary panel] (EH)
Haymarket Depot EGM245m 25ch by 2011
CH Haywards Heath VTB337m 65ch 12 June 1932 1983 Three Bridges [new] (T)
CA Automatic signals
HG Hazel Grove BEJ2m 21ch 1877✖possibly 1903
H Hazlehead MAC124m 46ch 1877 14 October 1973 Dunford East (DE)
TE Headcorn XTD45m 15ch 28 July 1968 Ashford (UE), Tonbridge (PE)
A Automatic signals
H Headingley LEH1 Leeds (L)
R Repeater signals
HL Headstone Lane CWJ12m 38ch 10 December 1988 Willesden Suburban (WS)
RHL Repeater signals
HM Healey Mills MVN242m 64ch 16 June 1963 20 January 2018 York Rail Operating Centre (HM)
RHM Mechanical distant signals
D Down direction automatic signals
DB Down branch line automatic distant signals
R Banner repeater signals
U Up direction automatic signals
UB Up branch line automatic distant signals
HK Heatheryknowe Code used from 1960 NEM27m 02ch 6 October 1943 28 July 1991 Yoker (YS)
HJ Heath Junction CAR3m 29ch 18 November 1984 6 September 2013 South Wales Control Centre (CF)
DC Down Caerphilly line automatic signals
UC Up Caerphilly line automatic signals
H Heaton HCS2m 16ch 6 September 1964 by 21 April 1991 Heaton Control Tower (CT) and Tyneside (T)
D Down line automatic signals. Code used to 1977?
DN Down north line automatic signals. Code used to 1977
DT Down Tynemouth line automatic signals. Code used to 1977
HJ Signals jointly controlled by Metro
RUN Banner repeaters to up north line automatic signals
U Up line automatic signals. Code used to 1977
UN Up north line automatic signals. Code used to 1977?
UT Up Tynemouth line automatic signals. Code used to 1977?
CT Heaton Control Tower ECM72m 16ch 21 March 1977
CTR Off indicators
HL Heaton Lodge Junction MVL329m 49ch MVN237m 15ch 18 October 1970 Healey Mills (HM)
HN Heaton Norris Junction Code used from 3 September 2004 CMP2183m 63ch 5 March 1955
HNA Automatic signals
HW Hebburn West Believed code used from 1960 JAW11m 59ch? 2 December 1967 Pelaw (P)
HB Hebden Bridge MVN223m 55ch 1891 20 October 2018✖last train; official closure 23 October 2018 York Rail Operating Centre (HG)
HN Heckington GRS2125m 54ch 1876
H Unclear whether code used
Heck Lane Gate box: line controlled by Hensall (H) WAG164m 74ch
H Heckmondwike 20 June 1971 Route closed?
HM
HD Hednesford At least two signals RRN29m 12ch 1877 27 August 2013 West Midlands Signalling Centre (RR)
H Heighington DAE15m 09ch 1872
HR Unclear whether code used
D Distant signals
R Distant signals
HC Helensburgh Central Code used from 1960 NEM724m 31ch 17 January 1960 4 November 1984 Craigendoran [new] (C)
HD Hellifield Most signals, where plates carried SKW1231m 14ch 1911 24 December 2006 Hellifield [temporary]
H Some distant signals
Hellifield [temporary] No signals or points controlled SKW1≈231m 14ch 24 December 2006 4 January 2007 Hellifield [reopened] (HD)
HD Hellifield [reopened] Most signals, where plates carried SKW1231m 14ch 4 January 2007
H Some distant signals
H Helpringham SPD158m 13ch 6 March 1882 4 October 1979 Sleaford South [new] (SS)
RD Automatic down line distant signals
RU Automatic up line distant signals
U Up direction automatic signals
HE Helpston Formerly named Helpston East Code when named Helpston East ECM181m 69ch 2 March 1898
H Code used from 26 June 1975 when downgraded to gate box: line controlled by Peterborough (P)
Helpston East See Helpston
HW Helpston West ECM1 Peterborough (P)
HY Helsby Junction CHW17m 34ch HHJ8m 61ch 1900
Helsby West Cheshire Junction HHJ8m 13ch 20 October 1991 Helsby Junction (HY)
H Hemingborough HUL128m 02ch 1873 26 October 1997 Selby Panel (S)
HW Henbury West AFR116m 36ch 4 April 1993 28 June 1994 Bristol (B)
HS Hendon Station SPC17m 08ch 1890 West Hampstead (WH)
RHS Repeater signals
Hendon [Tyne & Wear] HNB1m 53ch 21 August 1995 Ryhope Grange (RG)
HY Hendy Junction LLA4m 64ch 1913 7 July 1973 Port Talbot (PT)
HA Henley in Arden TSB13m 34ch 9 December 1907 by 29 October 2010✖demolished; official closure 1 November 2010 West Midlands Signalling Centre (TB)
HY Henley on Thames Code used by 10 December 1961 HEN35m 22ch 1897 11 March 1972 Reading (R)
H Hensall Later code WAG164m 41ch 1875 27 May 2014 Ferrybridge [new] (FE)
HL Earlier code
R Distant signals
HK Henwick WAH121m 66ch 1875
HH Henwick Hall Downgraded to gate box 22 March 1970: up line controlled by Shaftholme (SH), down line controlled by Brayton (BN). Demolished 1-8 February 2014 TCW1172m 20ch 1912 1983? Selby Panel (S)
H Hepscott EJM≈19m 44ch 26 February 1984 Morpeth [new] (M)
H Hereford Named Ayleston Hill to 8 June 1973 SHL51m 13ch July 1884 Wales Rail Operating Centre (NS) (planned)
EK Herne Bay VIR62m 55ch 1971 Margate (GE) and Faversham (EY)
A Automatic signals
EE Herne Hill VIR3m 65ch 3 June 1956 6 December 1981 Victoria Signalling Centre (VS)
A Automatic signals
HE Hertford East Codes used from 24 January 1960 HEB24m 07ch by 27 February 1888 18 May 2003 Liverpool Street [new] (L)
D Down line automatic signals
HD Hertford North HDB19m 29ch 4 April 1910 4 July 1976 Kings Cross (K)
Heslerton Station Downgraded to gate box 10 June 1970 YMS29m 32ch 19 December 1993 Malton (M)
H Hessay Gate box: line controlled by Hammerton (H) HAY15m 11ch
HE Hessle East HUL1≈3m 20ch Hessle Road Junction (HR)
HH Hessle Haven Believed code used from 1975 HUL14m 24ch 26 February 1983 Hessle Road Junction (HR), Melton Lane (ML) (some signals)
H Earlier code
D Down line automatic signals
R Repeater signals
U Up line automatic signals
UG Up goods line automatic signals
UM Up main line automatic signals
HR Hessle Road Junction HUL11m 74ch 14 October 1962
U Up line automatic signals
Hest Bank Gate box: line controlled by Preston (PN) CGJ73m 12ch 1958 28 April 2013✖delayed from 10 February 2013 Preston (PN)
HT Hethersett ETN117m 78ch 1885 28 June 1987 Colchester [new] (CO)
also had signals labelled HTA and HTB with no number
HM Hett Mill Code used by January 1971. Downgraded to gate box 28 November 1971 ECM5≈60m 21ch 11 March 1984 Ferryhill (F)
- Hever SCU127m 27ch 7 January 1990 Oxted [new] (OD)
H Hexham Named Hexham East to September 1966 NEC220m 53ch 1918
HM
HE
R Banner repeater signals
Hexham East See Hexham
HJ Hexthorpe Junction PED521m 04ch 25 July 1910 31 August 1980 Doncaster (D)
H Code reported but probably not carried
HY Heyford Ground Frame Rugby (RY)
HR Heywood Road SWY94m 45ch WES94m 45ch 1 January 1933 11 May 1984 Westbury [new] (W)
DW Down Westbury line automatic signals
UW Up Westbury line automatic signals
Heyworth Downgraded to gate box ECM2162m 54ch 25 April 2015 Doncaster (D)
H Hickleton Named Hickleton Main Colliery to 3 May 1981 SMJ215m 05ch 1 April 1933 31 May 2011 York [IECC] (L)
Hickleton Main Colliery See Hickleton
H Higham Temporary 'box for track renewals CCH22m 45ch 15 May 1988 2 August 1988 Kennett (K), Bury St Edmunds (BY)
Highams Park Gate box CJC8m 45ch February 1925 24 February 2002 Highams Park [temporary]
Highams Park [temporary] Gate box (opposite side of line to permanent 'box) CJC8m 45ch 24 February 2002 5 June 2002 Highams Park [reopened]
Highams Park [reopened] Gate box CJC8m 45ch 5 June 2002 24 June 2002 Liverpool Street [new] (L)
HB Highbridge Code used from 23 January 1972 MLN1145m 21ch 1914 18 March 1972 Bristol (B)
DM Down main line automatic signals. Code used from 29 January 1972
H High Dyke ECM1101m 25ch 11 June 1882 24 October 1977 Grantham (G)
HD
High Eggborough Gate box: line controlled by Hensall (H) WAG163m 33ch
HF High Ferry Downgraded to gate box 12 April 1981: line controlled by Sibsey (SY) GRS3111m 23ch 22 November 1890 18 December 1982 Sibsey (SY)
S High Marnham Shunt signals. A High Marnham box closed 25 March 1984 (control to Boughton Junction (BJ)): different structure? HIM Power station closed
HM High Meads Junction LLS10m 23ch by 1946 1 April 1967 Stratford (S)
High Street East Junction See High Street Junction
HS High Street Junction Named High Street East Junction to 8 February 1960 Code used from renaming NEM20m 26ch 1904 20 November 1989 Yoker (YF)
HN Hightown HXS39m 04ch 1878 11 March 1994 Merseyrail (ML)
HW Highworth Junction MLN176m 29ch June 1913 2 March 1968 Swindon (SN)
HW High Wycombe Named High Wycombe South to 21 December 1952 Code used from renaming NAJ216m 12ch 1905 10 August 1990 Marylebone [new] (ME)
WS Code used when named High Wycombe South
High Wycombe South See High Wycombe
Hillhouse No 1 See Huddersfield Hillhouse Junction
HJ Hilton Junction Code used from 21 September 1997 CDC245m 62ch SCM4149m 17ch 6 August 1873
H Unclear whether code carried
HY Hinckley WNS3m 70ch 1894 28 July 2006 Croft (CT)
Hirst Lane Gate box: line controlled by Ashington Junction (A) BWC3m 21ch
HT Hitchin Formerly named Hitchin (Cambridge Junction) Code used from renaming ECM132m 13ch ≈1868 16 January 1977 Kings Cross (K)
J Code when named Hitchin (Cambridge Junction)
WL Hitchin ERTMS test track (Hertford North-Langley Junction) control point. Control from Kings Cross when testing not taking place ECM1 4 May 2013
Hitchin (Cambridge Junction) See Hitchin
H Hitchin South Code used by 1974 ECM131m 46ch 1 March 1894 9 February 1975 Hitchin (HT)
D Down direction automatic signals
UM Up main line automatic signals
Y Hitchin Yard Code used by 1974 ECM132m 00ch June 1878 16 November 1974 Hitchin (Cambridge Junction) (J)
P Hither Green XTD7m 02ch 4 February 1962 4 November 1976 London Bridge (L)
A Automatic signals
EBW Hither Green Sidings C Code used from ≈1960 XTD8m 16ch 3 February 1962 Hither Green (P)
P Hither Green Station A Code used from 30 June 1929 on two signals only XTD7m 02ch 3 February 1962 London Bridge (L)
HS Hockley South DCL130m 05ch 1902 17 September 1972 Line closed. Controlled by Saltley (SY) on reopening
A Holborn Code used to ≈1927 HHH0m 18ch 2 March 1874 10 March 1974 Blackfriars (J)
H Code used from ≈1927
- Hollingbourne SBJ45m 06ch 1 July 1884 14 April 1984 Maidstone East (ME)
Hollinwood MPR24m 52ch 26 June 1994 Thorpes Bridge Junction [reopened] (TB)
H Holloway ECM1≈1m 35ch 17 May 1976 7 August 1976 Kings Cross (K)
ND Holloway North Down ECM11m 60ch 30 May 1948 31 July 1976 Holloway (H)
HND
SD Holloway South Down ECM11m 33ch 1901 31 July 1976 Holloway (H)
HSD
SU Holloway South Up ECM1≈1m 52ch 1876 16 May 1976 Holloway (H)
HSU
H Holme Possibly same structure as Holme gate box ECM169m 25ch 19 May 1895 13 December 1975 Holme [new] (H)
U Up direction automatic signals
H Holme [new] Gate box: line controlled by Peterborough (P). Still available as emergency control panel ECM169m 26ch 14 December 1975 3 May 1998 Peterborough (P)
Holmes Chapel CMP1166m 52ch 5 June 1959 10 December 2005 Manchester South (MS)
HJ Holmes Junction Code used by 1965 TJC2163m 43ch 17 April 1904 inspection date 29 July 1979 Sheffield (S)
CBL Holmwood BTH327m 06ch 1877 3 August 2004 Three Bridges [new] (T)
H Holton le Moor NOB321m 10ch 1890
HD Holyhead Named Holyhead No 1 to 23 January 1938 (one week), then named Holyhead Station CNH3263m 26ch 16 January 1938
Holyhead Freight Terminal CNH3263m 47ch 1968 Holyhead (HD)
Holyhead No 1 See Holyhead
Holyhead Station See Holyhead
H Holytown Junction Code used from 1973 EGS21m 26ch 1 June 1879 21 October 1973 Motherwell (M)
HJ Holywell Junction CNH3195m 75ch June 1903✖or 1902? early on 24 March 2018✖last train; official closure 26 March 2018 Wales Rail Operating Centre (FH)
HW Holywood Code used from 2002 GSW88m 30ch
HN Honiton BAE2154m 60ch 16 June 1957 26 March 2012 Basingstoke Signalling Control Centre (SE)
H
EDF Hoo Junction Code used from opening HDR27m 23ch 14 June 1964 16 May 1971 Dartford (D)
XW Hook BML142m 11ch 25 September 1904 22 October 1966 Basingstoke A (YW)
WA Automatic signals
RWA Distant to automatic signals
HN Hooton Code used by 1984 CRR2≈7m 70ch 19 May 1985 Hooton [new] (HN)
HN Hooton [new] CRR27m 73ch 19 May 1985 10 November 2013✖delayed from 25 February 2013, again from June 2013 and then from 28 September 2013 Chester PSB (HN)
HJ Horbury Junction MVN245m 38ch 1927
H
D Automatic signals
H Horden Code used from March 1977 LEN378m 58ch 28 March 1977 14 February 1990 Easington (E)
Horley B See Horley South
CP Horley North VTB325m 42ch 1970 Three Bridges (T)
CN Horley South Believed formerly named Horley B VTB325m 75ch 23 September 1960 Horley North (CP)
HC Hornchurch FSS213m 52ch 27 March 1961 Upminster (UM)
H
HB Horninglow Bridge Downgraded to shunt frame 14 June 1969 DBP110m 30ch 6 August 1893 2 December 1973 Derby (DY)
HY Hornsey Carriage Sidings ECM14m 15ch 21 July 1976
H1 Hornsey No 1 ECM14m 00ch August 1888 14 December 1974 Wood Green (WG)
HO Hornsey Up Goods ECM14m 16ch 5 April 1900 21 July 1976 Finsbury Park (FP)?
HD Horrocksford Junction At least two colour light signals DJH21m 60ch 1873
HJ Later code
HJR Distant signals: later code
R Distant signals: earlier code
H Horsemoor EMP84m 31ch 1899 13 November 1988 March South Junction (MS)
H Horsforth LEH14m 70ch 1883 29 October 2012 Harrogate (LH)
D Some down line automatic signals
RU Banner repeaters for up line automatic signals
U Up line automatic signals
CBP Horsham Code used from new BTH335m 34ch 24 April 1938 27 August 2005✖last train; official closure 30 August 2005 Three Bridges [new] (T)
HQ Horton Quarry Ground Switch Panel SAC242m 34ch 14 April 2025
HL Hospital Crossing FHR4≈3m 24ch Preston (PN)
EBS Hothfield Code used to 1980 SBJ55m 61ch 16 February 1985✖apparently delayed from 28 April 1984 Maidstone East (ME)
HF Code used from 1980 when panel provided
H Hougham ECM1111m 42ch 2 February 1891 30 April 1972 Grantham (G)
HG Hough Green MAJ10m 52ch 1961 18 December 1988 Hunts Cross (HC)
HV Hove Formerly named Hove A BLI11m 16ch by 1911 17 March 1985 Three Bridges [new] (T)
Hove A See Hove
CCL Hove B BLI1≈1m 42ch by 1911 25 November 1973 Hove A (HV)
W Hoveton & Wroxham WHC18m 70ch 1901 26 June 2000 Trowse Swing Bridge [new] (TB)
Howden HUL122m 27ch 1873 26 October 1997 Selby Panel (S)
H Howden-On-Tyne 5m 23ch from Newcastle 10 August 1980? Line transferred to Metro
HD
HS Howe & Co's Siding SAC302m 77ch 1916
How Mill NEC252m 66ch 28 January 1875✖inspection date 23 August 1989 Corby Gates (CG)
H Howsham Gate box YMS13m 29ch 1873
Howsham (Lincs) NOB316m 17ch 1890 7 May 1989 Holton le Moor (H)
Hoylake CWK39m 32ch 1889 18 September 1994 Merseyrail (ML)
HB Hubberts Bridge GRS2133m 43ch 29 January 1961
U Up line automatic signals
Hucknall Colliery had draw-ahead signals lettered V to Z with no number 15 January 1987 Bestwood Park Junction (BP)
HU Huddersfield MVL325m 60ch 30 November 1958 20 January 2018 York Rail Operating Centre (HU)
HD Possibly earlier code, though not likely
D Down line automatic signals
U Up line automatic signals
H Huddersfield Hillhouse Junction Believed renamed from Hillhouse No 1 MVL326m 16ch September 1970 Huddersfield (HU)
Huddersfield Junction See Penistone
Huish Crossing Downgraded to gate box 29 January 1972. Demolished 1990 MLN1132m 11ch 13 October 1903 16 December 1973 Bristol (B)
HL Hullavington SWB94m 17ch 1 May 1903 23 March 1968 Swindon (SN)
DB Down Badminton line automatic signals
HB Hull Bridge ADH11m 66ch 1885
D Hull Dock Control Cabin KGD
HP Hull Paragon Code used from December 1984. Once world's largest relay interlocking HUL10m 18ch 25 April 1938
P Code used from opening to December 1984
HR Humber Road Junction RBS1 10 August 1914? 13 September 1964 Coventry (CY)
Huncoat Station Local Control Frame FHR517m 35ch 1902 22 November 2014
H Hungerford BHL61m 47ch 19 March 1972 15 July 1978 Reading (R)
H Hunmanby HBS41m 51ch 1875 5 March 2001 Seamer [reopened] (SR)
H Hunslet TJC3 Stourton (S)
H Hunterston Junction Code used from 1978 LGS236m 47ch 2 April 1978 28 August 1992 Paisley [new] (PH)
Hunterston Emergency Signalling Panel See Paisley Hunterston interlocking LGS236m 45ch 9 November 1986
H Hunterston High Level Code not certain LGS237m 16ch 1978
H Hunterston BSC Control Tower LGS237m 48ch 2 June 1979 1992 Hunterston BSC Control Tower [reopened] (H)
H Hunterston BSC Control Tower [reopened] LGS237m 48ch 1996
HU1 Huntingdon North No 1 ECM158m 58ch 29 October 1899 13 March 1977 Peterborough (P)
R Banner repeater signals
HU2 Huntingdon North No 2 ECM159m 02ch 15 July 1894 13 March 1977 Peterborough (P)
H Huntly Formerly named Huntly South Code used from 2002 to 2003 ANI140m 43ch 3 March 1890
HT Code used from 4 January 2003
Huntly South See Huntly
HC Hunts Cross MAJ7m 13ch 5 December 1982
HC Hunts Cross West Junction MAJ6m 22ch 2 December 1956 4 December 1982 Hunts Cross (HC)
Huntspill MLN1147m 04ch 19 May 1940 18 March 1972 Bristol (B)
H Hurlford Named Hurlford South to 8 July 1934 Code used from 1976 to 2002 GSW35m 50ch 1926
HF Code used from 2003
Hurlford South See Hurlford
CCN Hurst Green SCU121m 31ch 11 July 1987 Oxted [new] (OD)
HN Huyton Demolished 8 July 2014 DSE5m 50ch 1899 5 July 2014 Manchester Rail Operating Centre (LL)
H Hyde Junction HAJ6m 15ch February 1903 9 December 1984 Guide Bridge (GB)
HR Hyde Road Junction GTP21m 16ch 29 January 1906 15 October 1988 Line closed
H Hyndland Code used from 1979 NEM33m 48ch 3 July 1960 20 November 1989 Yoker (YH)
HY Code used from opening
HF Finnieston interlocking. Code used from 1979