Signal box prefix codes

A (hopefully) comprehensive listing

'Boxes beginning B

Last update 6 January 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
B Backworth   BNE c2m 0ch 16 November 1958   Newsham (N)
D Down line automatic signals
U Up line automatic signals
BM Badminton Code used from late-1960s SWB 99m 77ch 1 January 1903 8 May 1971 Bristol (B)
DB Down Badminton line automatic signals
BF Baguley Fold Junction   MVL1 2m 39ch 1890    
B Balby Junction   ECM1 c155m 40ch     Doncaster (D)
CJ Balcombe   VTB3 33m 68ch   1963 Balcombe Tunnel Junction (CK)
CK Balcombe Tunnel Junction   VTB3 31m 58ch   1978 Three Bridges (CL)
BT Balderton   ECM1 116m 71ch     Doncaster (D)
B Baldock   SBR       Kings Cross (K)
DC Balham   VTB1 4m 77ch 12 October 1952 7 June 1981 Victoria SC (VC)
BH Balloch Central Code used from 1960 BCH 20m 42ch 4 April 1960 24 April 1988 Yoker (YD)
B Balne Gate box: up line controlled by Doncaster (D), down line controlled by York (Y) ECM2 165m 71ch 1957    
  Bamber Bridge Gate box: line controlled by Preston (PN) FHR4 2m 33ch 1906    
B Banavie Code not displayed on signals MLG2 0m 26ch 14 June 1987    
AL Ardlui points indicators (code not displayed)
CL Crianlarich points indicators (code not displayed)
FL Fillan points indicators (allocated, no points present)
GH Gaerlochhead points indicators (code not displayed)
UT Upper Tyndrum points indicators (code not displayed)
BN Banbury North   DCL 86m 26ch 1900    
BS Banbury South   DCL 86m 2ch 1908    
DM Down main line automatic signals
UM Up main line automatic signals
BR Bangor   CNH3 239m 2ch 1923    
B Bank   DRN c1m 43ch 11 July 1898 1993? Waterloo (WK)
A Automatic signals
PB Barassie Local Signalling Panel See Paisley Barassie interlocking AYR4 33m 3ch 29 November 1982 25 May 1986 Paisley (PB) (local control still possible)
B Barassie   AYR4 c33m 3ch 1891 29 November 1982 Paisley (PB)
  Barcroft Gate box: line controlled by Doncaster (D) ECM2 162m 15ch      
BH Bardon Hill   KSL 111m 24ch 1899    
BM Bardon Mill Out of use 29 June 2002 to 29 July 2002 NEC2 32m 41ch 1874    
BL Bare Lane   MSM 0m 57ch 1937    
BD Bargoed   CAR 18m 7ch 9 November 1970    
B Carried on 'box; unclear if carried on signals
BK Barking   FSS2 7m 42ch 20 March 1961 (some sources state 3 July 1961) 17 April 1995 Upminster (UR)
D Down line automatic signals
U Up line automatic signals TAH4 13m 62ch
BE Barking East   FSS2 7m 62ch   20 March 1961 Barking (BK)
BS Barking Station   FSS2        
BW Barking West   FSS2 7m 35ch   20 March 1961 Barking (BK)
BE Barkston East Junction   ABE2 0m 39ch 1882 3 October 2005 Allington (AL)
BS Barkston South Junction   ECM1 109m 56ch     Doncaster (D)
  Barlaston   CMD2 24m 48ch 1985   Stoke on Trent panel (SE)
  Barlby Gate box: line controlled by Selby West (S) HUL1 30m 34ch 1898    
  Barming   SBJ 37m 43ch   24 April 1982 Maidstone East (EBX)
B Barnby Replaced by structure on opposite side of line ECM1 119m 3ch   9 July 1977 Barnby (BY)
BY Barnby Reduced to gate box: line controlled by Doncaster (D) ECM1 119m 3ch 11 July 1977    
  Barnby Moor & Sutton   ECM1 141m 56ch 1872    
WBO Barnes   HOU 7m 25ch 22 February 1959 1997 Wimbledon (W)
BE Barnetby East   MAC3 94m 64ch 1914    
BH Barnham   TBH2 22m 35ch 1911 6 May 2008 (planned) Barnham [new] (BH)
CBY Original code
BH Barnham [new]   TBH2 c22m 45ch 6 May 2008 (planned)    
BH Barnhill Code used from 2002 SCM5 19m 69ch c1874    
BY Barnsley   PED2 6m 59ch 13 April 1998    
BJ Barnsley Junction Mileage accuracy unknown PED1 29m 8ch      
BY Barnsley Station Junction   BAH2 52m 58ch 1901 10 April 1998 Barnsley (BY)
BSJ Unclear if code ever carried
BD Barrhead   GBK 6m 70ch 1894    
BR Barrhill Code used from 2002 STR2 12m 35ch 1935    
BF Barrow in Furness Code used from 2008 CBC1 29m 5ch 1907    
BR Barrow Road Gate box: line controlled by Oxmarsh Crossing (OX) BAR 106m 55ch 1885    
B Barry   BRY 8m 7ch 1897    
DB Down Barry line automatic signals
UB Up Barry line automatic signals
B Barry Island   BRY 8m 63ch 1930 5 May 1975? Barry (B)
  Barry West Gate box ECN3 8m 60ch 1908 1997 Carnoustie (CA)
BH Barton Hill   YMS 11m 49ch 1936    
BM Barton Moss   DSE 25m 50ch     Eccles (E)
  Baschurch   WSJ2 179m 14ch 1884 28 March 1999 Crewe Junction (CJ)
BH Basford Hall Junction   LEC4 156m 22ch 1897    
YW Basingstoke 'A'   BML1 47m 46ch by 1894 20 November 1966 Basingstoke [panel] (YW)
C Basingstoke 'C' [Great Western] Code displayed on 'box.  Uncertain if used (or intended for use) on signals BKE 51m 17ch by 1880 20 November 1966 Basingstoke [panel] (YW)
YW Basingstoke [panel]
("Basingstoke Old")		   BML1 47m 41ch 20 November 1966    
DWA Automatic signals reading to YWD signals
RWA Repeaters to automatic signals
YWD Semi-automatic signals controlled from Ground Frame D
YWF Semi-automatic signals controlled from Ground Frame F
WA Automatic signals
BE Basingstoke Signalling Control Centre
("Basingstoke New")		   BML1 47m 55ch 16 April 2007    
EBU Bat And Ball Named Sevenoaks Bat And Ball until 5 June 1950 OJS   c1877 22 November 1981 Sevenoaks (NE)
BH Bathampton Junction Code used from 24 August 1969 MLN1 104m 46ch 21 September 1956 15 August 1970 Bristol (B)
DM Down main line automatic signals
DT Down Trowbridge line automatic signals BFB 0m 0ch
UM Up main line automatic signals
UM Bath Goods Up main line automatic signals MLN1 107m 31ch 30 April 1911 15 August 1970 Bristol (B)
BL Bathley Lane Gate box ECM1 122m 78ch 1930   Doncaster (D)
B Batley   MDL1 35m 57ch 1878    
D Down line automatic signals
U Up line automatic signals
  Battersby   MBW1 10m 54ch by 1887 August 1989 Nunthorpe (N)
MBW2 12m 10ch
HC Battersea Park Junction   VTB1 1m 21ch 1906 7 October 1979 Victoria SC (VC)
BP Battersea Pier 'A'   VTB1 0m 77ch   4 June 1939 Victoria Central (VC)
EDN Battle   TTH 55m 46ch   1986 Bo Peep Junction (BJ)
BH Bay Horse   CGJ6 c15m 12ch   26 November 1972 Preston (PN)
B Beal Code used from 10 April 1960 ECM7 58m 52ch   18 April 1982 Tweedmouth (T)
D Down direction automatic signals
U Up direction automatic signals
BJ Bearley Junction   HSA 12m 58ch 1907    
TSB 17m 61ch
  Bearstead   SBJ 42m 59ch 1884 14 April 1984 Maidstone East (ME)
B Beattock Temporary panel WCM1 49m 51ch 16 January 1972 29 April 1973 Motherwell (MC)
EG Beckenham Junction   VIR c8m 40ch 12 April 1959 1983 Victoria (VS)
B Beckingham   SPD4 100m 77ch 1877    
BC Becontree   FSS2 c9m 18ch   27 March 1961 Upminster (UM)
  Bedale Gate box REB2 7m 42ch 1875 1996  
BD Bedford St Johns   BBM 15m 74ch 1977 6 September 2004 Marston Vale (MV)
LW Bedhampton Crossing Reduced to gate box 28 January 1968 WPH2 38m 8ch 1879 3 June 1979 Havant (KW)
BC Bedlam Crossing Also known as Bedlam Gates Crossing CNN 3m 40ch     Three Spires Junction (TS)
BN Bedlington North   EJM 15m 71ch 1912    
BS Bedlington South Code not confirmed EJM 15m 59ch      
  Bedminster   MLN1 119m 11ch 30 April 1932 5 April 1970 Bristol (B)
BN Bedwyn   BHL 66m 29ch 1897 11 September 1978 Reading (R)
  Beer Ferris Also known as Bere Ferrers DAC c222m 65ch by 1900 27 October 1968 Plymouth (P)
BC Beeston Castle & Tarporley   CNH1 168m 60ch 1915    
B Beeston Junction   DOL1 c182m 35ch     Leeds (L)
D Down line automatic signals
U Up line automatic signals
BN Beeston North Junction   TSN1 c124m 55ch     Trent (TT)
BNR Repeater signals
BJ Beighton Junction   CHR c155m 48ch   16 May 1982 Sheffield (S)
BX Beighton Station Junction   BEW 47m 41ch      
  Belasis Lane   POC 1m 4ch 1929    
BD Belford Code used from 1962 ECM7 51m 45ch 25 February 1962 11 July 1990 Tweedmouth (TW)
B Unclear if code ever used
D Down line automatic signals
U Up line automatic signals
BL Bellgrove Code used from 1960 NEM2 c0m 70ch? 22 May 1960 28 July 1991 Yoker (YS)
Y Bellingham   CAT   1942 17 January 1982 Victoria (VS)
BJ Bellside Junction Code used from 1973 EGS2 c3m 60ch   29 June 1981 Motherwell (M)
BJ Bellwater Junction   GRS3 118m 55ch 1913    
BO Belmont Gate box: line controlled by Starbeck (SS) HAY1 17m 69ch 1914    
B
BV Belvedere Reduced to gate box 1970 NKL   1956 January 1981 Dartford (D)
U Beningbrough Up line automatic and semi-automatic signals ECM5 c7m 1ch   ?? York (Y)
BC Bentley Colliery   ECM1 c158m 50ch 1871 26 October (or 7 December) 1980 Doncaster (D)
BC Bentley Crossing   DOL1     7 July 1979 Doncaster (D)
BH Bentley Heath Gate box from 30 August 1969: line controlled by Saltley (SY) DCL 119m 44ch 1932 18 February 2008 West Midlands Signalling Centre (LJ)
B Bentley Junction   DOW 1m 4ch   17 February 1980
(believed delayed from 7 July 1979)		 Doncaster (D)
BJ HJB 3m 24ch
B Benton Some signals also had suffix X, the meaning of which is unclear ECM7 4m 26ch 1 March 1964 1991 (by 21 April) Tyneside (T)
D Down direction automatic signals (until 1979)
R Banner repeater signals
U Up direction automatic signals
BB Benton Bank   ECM7 c2m 60ch     Heaton (H)
  Bere Ferrers See Beer Ferris
BL Berkswell Reduced status from 2 July 1966 RBS1 c99m 30ch c1880s   Coventry (CY)
BLR Repeater signals
BK Berwick   KJE3 15m 56ch 1879    
  Bescar Lane   WBS3 30m 78ch   9 May 1993 Burscough Bridge (BB)
BC Bescot Curve Junction Unclear if code carried DPJ c4m 73ch     Walsall (WL)
DT Bescot Down Tower   PBJ 8m 20ch 1965    
BT Unclear whether code used
  Bescot Up Hump   PBJ 8m 20ch 1963   Walsall (WL)
SB Bescot Yard Prefix exists on stop boards, not on signals per se          
BD Bescot Yard Prefix exists on signals, it is believed they are controlled from within the yard PBJ 8m 20ch      
BP Bestwood Park Junction   RAC 130m 6ch 1951 29 September 2001 Trent (TT)
BW Betchworth   RSJ   1934 1983 Reigate (RG)
BG Bethnal Green   LTN1 1m 19ch 30 January 1949 2 April 1989 Liverpool St (L)
DF Down fast line automatic signals
DS Down suburban line automatic signals
R Repeater signals
UF Up fast line automatic signals
BR Betley Road   LEC4 153m 13ch 1875 4 May 2004 Stoke on Trent panel (SC)
BH Betteshanger Colliery Disused from 1989 BME2 89m 11ch 1923   Deal (EBZ)
BS Beverley   HBS 8m 16ch 1911    
B Code replaced by BS
CCW Bexhill Closed; reopened 21 December 1998 WJB 29m 61ch 1876    
D Distant signals
DCCW Distant signals
B Bicester Formerly Bicester No 1 OXD c19m 30ch by 1883 9 June 1986 Oxford (OX)
  Bicester No 2   OXD 19m 72ch 9 November 1941 29 October 1973 Bicester (B)
  Bidston Dee Junction   CWK3 4m 78ch 1936 18 September 1994 Merseyrail (ML)
WDB3 0m 9ch
BE Bidston East Junction   CWK2 4m 40ch 1937 10 September 1994 Merseyrail (ML)
CWK3 4m 40ch
BEN 4m 40ch
B Biggleswade   ECM1 c40m 75ch June 1876 16 January 1977 Kings Cross (K)
B Billingham on Tees   LEN3 63m 59ch 1904    
BT Billingshurst   TBH1 44m 73ch c1876    
BS Bilton Siding   RTS c0m 65ch   August 1985? Rugby (RY)
BM Bingham   NOG1 119m 58ch 1875    
B Bingley Station   TJC3 209m 7ch 1932 22 October 1994 Leeds (L)
PS Birchills Power Sidings Downgraded to shunt frame 4 June 1967         Walsall (WL)?
DE Birchington on Sea   VIR c70m 56ch   1968 Margate (GE)
  Birkdale   HXS3 17m 26ch 1905 11 March 1994 Merseyrail (ML)
BC Birkenhead Central   MIR2 2m 34ch 1886 10 September 1994 Merseyrail (ML)
BN1 Birkenhead North No 1 See also note 2 CWK2 4m 22ch 1888 10 September 1994 Merseyrail (ML)
BN Birkenhead North No 2 See also note 2 CWK2 3m 78ch 1888 10 September 1994 Merseyrail (ML)
NS Birmingham New Street   RBS2 0m 16ch 10 January 1966    
RNS Repeater signals
B Birmingham [Snow Hill]   DCL 129m 24ch 11 September 1960 6 March 1972 Line closed.  Controlled by Saltley (SY) on reopening
SH Code from 1968
B Birmingham Snow Hill North   DCL 129m 43ch 31 October 1909 11 September 1960 Birmingham Snow Hill South (SH)
B Birmingham Snow Hill South   DCL 129m 21ch 1913 11 September 1960  
BGS Bishopsgate South   LTN1       Liverpool Street (L)?
US Up suburban line automatic signals
BS Bishops Stortford   BGK 30m 22ch 1931 29 October 2003 Liverpool St (L)
D Down line automatic signals
RBS Repeaters to controlled signals
  Bishton Reduced to gate box 17 April 1961: line now controlled by Newport (N) SWM2 153m 0ch 7 February 1941    
BB Black Bank   EMP 75m 23ch     Manea (M)
  Blackboy Lane Crossing   TBH2 30m 25ch     Chichester (CC)
BC Black Carr Junction   ECM1 c153m 18ch   21 August 1977 Decoy No 1 (DY)
BK Blackford Code used from 2002 SCM4 133m 28ch c26 June 1933    
J Blackfriars   HHH   11 August 1946 14 February 1982 Victoria SC (VS)
B Blackfriars Junction Original code to c1927 HHH 0m 64ch 21 March 1926 2 June 1941 Blackfriars Junction temporary panel (BJ)
BJ Code from c1927
BJ Blackfriars Junction temporary panel   HHH   2 June 1941 11 August 1946 Blackfriars (J)
N Blackheath 'A'   BEX     15 March 1970 St Johns (L)
EDG Blackheath 'B'   BEX   1 May 1895 (date may be for 'A' box) 15 March 1970 St Johns (L)
B Blackmoor Crossing Mileage accuracy unknown MAC2 30m 31ch c1875 1983  
BN Blackpool North No 1 Permanently switched out from 30 April 2007.  See also note 1 PBN 16m 79ch 1959    
BN2 Blackpool North No 2 See note 1 PBN 17m 30ch 1896    
BJ Blackrod Junction   MVE2 17m 27ch 1879    
BE Blackwell East Junction   NHT1 0m 31ch     Trent (TT)
NHT2 137m 24ch
BA Blair Atholl Code used from 1978 HGL2 35m 5ch c1890    
BN Blakedown   OWW 138m 51ch 1888    
BY Blankney Also known as Metheringham SPD2 72m 79ch 1928    
B Blaydon   NEC1 5m 22ch      
BN
BM Blea Moor   SAC 248m 39ch 1941    
BP Blenkinsop   NEC2 c40m 19ch   1987 Haltwhistle (HW)
BY Bletchley Still open in part LEC1 46m 46ch 28 June 1965 7 June 2004 (in part) Rugby SCC (TK)
BYR Repeater signals 5 September 2004 (in part) Rugby SCC (KR)
BH Blisworth Shunt Frame   LEC1 c62m 74ch     Rugby (RY)
BT Blotoft Code carried by colour light but not semaphore signals SPD1 55m 26ch 1882    
BH Bloxwich   RRN1 2m 7ch 1959    
BR Bognor Regis   BBR 25m 51ch 29 May 1938    
BC Boldon Colliery Code used from 1985.  Damaged by fire: reopened 4 June 2000 LEN3 95m 19ch 1893 11 January 2002 Tyneside (T)
B
BL Bollo Lane Junction   BOK5 2m 64ch 1878    
BN Bolton On site of Bolton East MVE1 10m 31ch 8 December 1985   Manchester Piccadilly (MP)
B Bo'ness Junction   EGM1 c27m 19ch 30 April 1933 12 March 1979 Polmont (PB)
BR Boothferry Road See Goole
B Bootham   YMS 1m 51ch     Strensall (S)
BE Bootle (Cumbria)   CBC1 53m 37ch 1874    
BJ Bootle Junction A Bootle Junction (BJ) box was in use in 1977: unclear if this is a different structure HXS3 2m 34ch 13 April 1986 11 March 1994 Merseyrail (ML)
BJ Bo Peep Junction Code from 1986 TTH 60m 65ch c1912    
EDK Code to 1986 WJB 32m 72ch
BS Bordesley South   DCL 127m 62ch   30 August 1969 Saltley (SY)
BY Bordesley Down Yard Ground Frame   DCL 127m 71ch      
B Boroughbridge Road Code used from 1963 LLP2 42m 22ch   1979 Low Gates (LG)
LLP3 42m 22ch
BG Borough Green   SBJ   1882 9 December 1983 Maidstone East (ME)
D Borough Market Junction   XTD 1m 60ch 27 June 1926 19 April 1976 London Bridge (L)
  Bosham   TBH2 31m 49ch 1904 26 September 1992 Chichester (CC)
  Boston Dock Swing Bridge   No ELR?   c1887    
WS Boston West Street Junction   GRS3 107m 13ch 1874    
BT Botley   ETF 79m 0ch
(or 78m 68ch?)		 1873 1982 Eastleigh (E)
BW Bottesford West Junction   NOG1 113m 78ch May 1876    
BC Boughton Crossing   NMH c3m 0ch      
BC Boultham Crossing   NOB1 31m 17ch 19 April 1925 19 March 1988 West Holmes (WH)
BG Bounds Green   HDB     14 September 1974 Wood Green (WG)
B
BG Bounds Green Carriage Sidings   HDB 5m 35ch c1978    
BG Bounds Green South End   ECM1 5m 5ch 1994    
BE Bourne End Ground switch panel WBB 28m 50ch 11 February 2008    
WFB Bournemouth   BML2 108m 10ch 8 July 1928 15 December 2003 Bournemouth (BC)
BC Bournemouth   BML2 108m 10ch 15 December 2003    
  Bournemouth Carriage Sidings
formerly Bournemouth West Junction		 Closed 1965; reopened as ground frame 1967 BBD 0m 68ch 1888    
B Bowesfield   DSN2 10m 75ch 1905    
B Bow Junction   LTN1 2m 69ch 24 July 1949 8 April 1996 Liverpool St (L)
BJ
DE Down electric line automatic signals
DM Down main line automatic signals GFB 3m 39ch
RB Banner repeater signals
UE Up electric line automatic signals
UM Up main line automatic signals
BW Bowling Code used from 1959 NEM5 c13m 25ch 25 October 1959 22 February 1992 Yoker (YD)
BJ Bowling Junction   MRB c39m 20ch     Mill Lane Junction (M)
EP Bow Road   CDT c0m 30ch      
  BP Terminal LC [Grangemouth]   GMH 3m 68ch 1970    
BN Bracknell   RDG1 c32m 28ch by 1900 27 January 1974 Wokingham (WM)
BJ Bradford Junctions   WEY 104m 23ch 2 May 1933 March 1990 Westbury (W)
DT Down Trowbridge line automatic signals
UB Up branch line automatic signals: code used from 1969
UT Up Trowbridge line automatic signals
  Bradford On Avon   BFB 7m 1ch by 1880 31 July 1966 Bradford Junction
B Bradley Junction   MVL3 c28m 41ch     Healey Mills (HM)
BS Bradwell Sidings   CMD2 16m 29ch 1889 18 May 2002 Stoke on Trent (SOT)
B Braidhurst   SCM1 90m 25ch   17 December 1972 Motherwell (M)
WBC Bramley   BKE 46m 38ch 1917 25 October 1977 Basingstoke (YW)
BF Brampton Fell   NEC2 50m 10ch 1918    
B Brancliffe East Junction   MAC3 53m 57ch 1905 1997? Worksop (WP)
B Brandon   ETN 86m 25ch 1931    
WBZ Branksome   BML2 110m 46ch 14 December 1886 15 December 2003 Bournemouth (BC)
BY Bransty Code used from 2008 CBC1 74m 73ch 1899    
CBC2 0m 16ch
N BREL North Ground Frame   ECM1       Doncaster (D)
  Brent Knoll   MLN1 142m 39ch 1891 29 January 1972 Bristol (B)
BS Brent Sidings   LEC1 6m 41ch   13 July 1996 Willesden PSB (WN)
BS Brereton Sidings   RRN2 13m 25ch 1908    
B Unclear if code carried on signals
  Brewery Sidings   MPR1 1m 59ch 1894 15 September 1998 Manchester North (MN)
F Bricklayers Arms Junction   LBW 2m 16ch 8 October 1950 20 July 1975 London Bridge (L)
A Automatic signals
BJ Bridge Junction   ECM1 c155m 38ch   7 July 1979 Doncaster (D)
BC Bridgeton Central Code used from 1960 BGN 0m 61ch 1912 30 October 1988 Yoker (YF) (in part: remainder closed)
B  
  Bridgwater   MLN1 151m 29ch 1932 18 March 1972 Bristol (B)
BN Bridlington Code from 9 February 1998 when 'box renamed from Bridlington South HBS 30m 58ch 1875    
BS Code until 9 February 1998 when 'box renamed
BQ Bridlington Quay   HBS 31m 6ch 1911 7 February 1998 Bridlington (BN)
  Brierfield   GJC 24m 14ch 1876    
B Brigg   MAC3 91m 23ch 1885    
D Brighouse Down line automatic signals
(thought that up line indicates to Elland)		 MVN2 c34m 36ch     Elland (E)
CB Brighton   VTB3 50m 37ch 16 October 1932 30 March 1985 Three Bridges (T)
L Brighton Lovers Walk Depot   VTB3 49m 74ch 1985    
BN Carriage shed
BIY From February 2006
B Brightside   TJC2 c161m 17ch 25 April 1965 18 March 1973 Sheffield (S)
D Down line automatic signals
U Up line automatic signals
BD Brimsdown   BGK 10m 66ch 1944 27 August 2002 Liverpool St (L)
D Down line automatic signals
U Up line automatic signals
BW Brinklow   LEC2 c88m 0ch   12 September 1964 Rugby (RY)/Nuneaton (NN)
RY Temporary code until control taken over by Rugby (RY)
B Bristol   MLN1 118m 26ch 7 March 1970    
BD Down direction automatic signals on up Badminton line
BU Up direction automatic signals on down Badminton line
DA Down Avonmouth line automatic signals
DB Down Badminton line automatic signals
DB Down Bristol line automatic signals
DC Down Charfield line automatic signals
DF Down Filton line automatic signals
DFM Down Filton main line automatic signals
DFR Down Filton relief line automatic signals
DM Down main line automatic signals
DT Down Trowbridge line automatic signals
DT Down Tunnel line automatic signals
MD Down direction automatic signals on up main line
MU Up direction automatic signals on down main line
UA Up Avonmouth line automatic signals
UB Up Badminton line automatic signals
UC Up Charfield line automatic signals
UF Up Filton line automatic signals
UFM Up Filton main line automatic signals
UFR Up Filton relief line automatic signals
UM Up main line automatic signals
UT Up Trowbridge line automatic signals
UT Up Tunnel line automatic signals
  Bristol East   MLN1 118m 5ch 29 November 1935 7 March 1970 Bristol (B)
  Bristol East Depot Down Yard   MLN1 117m 21ch c1889 18 July 1970 Bristol (B)
ED Bristol East Depot Main Line Box moved to Hungerford 1972 MLN1 116m 77ch 11 January 1960 18 July 1970 Bristol (B)
  Bristol Loco Yard   MLN1 118m 38ch 9 December 1934 15 March 1970 Bristol (B)
PM Bristol St Philips Marsh   BRL 0m 42ch April? 1893 18 July 1970 Bristol (B)
PM Bristol St Philips Marsh Depot   BRL 0m 40ch 2 August 1991    
  Bristol West   MLN1 118m 51ch 26 May 1935 12 April 1970 Bristol (B)
  Bristol West Depot   MLN1 120m 68ch 1906 4 December 1971 Bristol (B)
BG Broad Green   DSE c3m 47ch     Liverpool Edge Hill (EH)
BH Broadwath Ground Box Code probably not carried on signals NEC2 c54m 61ch     Corby Gates (CG)
BH Brockenhurst Code from 19 October 1978 BML2 92m 57ch 22 November 1964    
WDV Code to 1978 when new panel installed and name changed from Brockenhurst 'A'
B Brocklesby   MAC3 99m 33ch 1914    
Q Brockley Lane   NTL 6m 37ch   1973 Nunhead (R)
BD Bromfield   SHL 25m 20ch 1873    
BB Bromford Bridge   DBP3 38m 43ch   23 August 1969 Saltley (SY)
B Bromley By Bow   FSS1 3m 12ch   1 May 1961? Fenchurch Street (F)
BC Bromley Cross Gate box.  Line controlled by Manchester Piccadilly (MP) BBB 13m 47ch 1875    
Z Bromley North   BNG     4 November 1976 London Bridge (L)
BS Bromsgrove South   BAG2 55m 61ch c1922 21 April 1969 Gloucester (G)
  Brook Hall Road Gate box HXS3 5m 69ch 1885 11 March 1994 Merseyrail (ML)
RW Brookwood   BML1 28m 0ch 25 September 1904? 5 June 1966 Woking (WV)
B Broomfleet   HUL1 14m 33ch 19 May 1904    
WDF Broom Gates   BAE2 c141m 14ch     Chard Junction (CJ)
BE Brough East   HUL1 10m 24ch 28 February 1904    
B Unclear whether code used
BN Broxbourne   BGK 17m 24ch (January? or) 10 July 1960 27 May 2003 Liverpool St (L)
D Down line automatic signals
U Up line automatic signals
BJ Broxbourne Junction Codes used from 31 January 1960 BGK 18m 37ch     Liverpool St (L)
U Up line automatic signals
BL Brundall Junction   NOL 5m 73ch 1883    
  Bryn y Gwynon Gate box SWM2 185m 9ch c1870 1993 Port Talbot (PT)
  Buckland Crossing Gate box VIR 49m 16ch c1880 7 December 1997 Faversham (EY)
S Buildwas Power Station Control Room Sometimes also known as Ironbridge Power Station MJI2 159m 60ch      
BW Bullfield West   MVE2 c11m 15ch     Manchester Piccadilly (MP)
B Bullhouse Colliery Mileage accuracy unknown MAC1 25m 77ch      
CF Burgess Hill   VTB3 41m 46ch   1963 Keymer Crossing (CG)
  Burn Lane Gate box: line controlled by Selby West (S) TCW1 170m 70ch      
B Burnmouth   ECM8 c51m 60ch     Edinburgh (EG)
R Banner repeater signals
BC Burnley Central   GJC       Preston (PN)
BS Burrows Sidings   VON 46m 66ch      
  Burrs Road Gate box: line controlled by Clacton (C) COC 68m 4ch      
BB Burscough Bridge   WBS3 27m 50ch 1922    
  Burton Agnes   HBS 24m 45ch 1875 or 1903   Driffield (D)
BH Burton & Holme   CGJ7       Carlisle (CE)?
BHR Repeater signals
BL Burton Lane   YMS 1m 9ch 1878 30 April 1989 Strensall (S)
BY Bury St Edmunds Yard   CCH 28m 33ch 1888    
BE Bushey   CWJ 15m 75ch   1988? Willesden Suburban (WS)
B Butterwell   BWO 6m 10ch 1977    
  Buxton   BEJ 18m 70ch 1894    
BL Bystable Lane Code seen a little north of Thornton Abbey station BAR c102m 10ch      

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