| ELR | ELR Desccription |
| AAV | ASCOT JN - ASH VALE JN |
| ABD | ABERDARE BRANCH |
| ABE1 | ALLINGTON JNC TO FORMER BARKSTON EAST JN (EXTENDED TO INCLUDE ABE2) |
| ABE2 | BARKSTON JNC BARKSTON EAST JNC (NOW REPLACED BY ABE1) |
| ABW | ABBOTSWOOD BRANCH |
| ACR | ASHFORD 'E' JN - RAMSGATE VIA CANTERBURY WEST |
| ACW | ACTON CANAL WHARF TO WILLESDEN |
| AEG | ALLERTON E JN - GARSTON JN (SPEKE-EDGE HILL LINE) |
| AFE | ABBEY FOREGATE JN - ENGLISH BR JN (LOOP LINES) |
| AFL | SEFTON JCN - METAL BOX SIDING (AINTREE FORK LINE) |
| AFR | AVONMOUTH AND FILTON RAILWAY |
| AGW | ANGERSTEIN JN - ANGERSTEIN WHARF |
| AGY | Unknown - limited data available |
| AHG | NINE ELMS JN - LINFORD STREET JN. |
| AHX | ALLERTON JN - HUNTS CROSS W JN (ALLERTON CONN.LINE) |
| AJB | ADDLESTONE JN - BYFLEET JN |
| AJM1 | AMBERGATE JN - ROWSLEY (PART CLOSED) |
| AJW | Unknown - limited data available |
| ALC1 | ASTON NTH JCN - SUTTON |
| ALC2 | SUTTON - LICHFIELD CITY JCN |
| ALK | ABERDARE LINK LINE |
| AMB | AVONMOUTH BRANCH |
| AMJ | ASHTON MOSS S JN - ASHTON MOSS N JN |
| AML | ATTENBOROUGH JN - MEADOW LANE JN |
| ANI1 | ABERDEEN TO INVERNESS : ABERDEEN STN. - KEITH |
| ANI2 | ABERDEEN TO INVERNESS : FORRES STN. - KEITH |
| ANI3 | ABERDEEN TO INVERNESS : FORRES STN - INVERNESS MILBURN JN |
| ANL | ACTON & NORTHOLT LINE (VIA GREENFORD EAST) |
| ANN | NEWTON JN - MAUCHLINE JN |
| APG | Unknown - limited data available |
| APL | APPLEDORE JN - LYDD TOWN (GOODS LINE) |
| APS | ABERTHAW POWER STATION BRANCH |
| ARG1 | RUTHERGLEN CENTRAL JN-FINNIESTON JN (PART 1) |
| ARG2 | RUTHERGLEN CENTRAL JN - FINNIESTON JN (PART 2) |
| ARH | ARDROSSAN S BEACH - ARDROSSAN HBR |
| AST | Unknown - limited data available |
| ATH | ASHFORD'D' JN - HASTINGS |
| ATL | PECKHAM RYE (ATLANTIC LINE) - BATTERSEA PARK JN |
| AWL | ACTON EAST - ACTON WELLS JN (ACTON WELLS LINE) |
| AWP | ANLABY ROAD JN WEST PARADE NORTH JN |
| AYH1 | Unknown - limited data available |
| AYH2 | Unknown - limited data available |
| AYR1 | GLASGOW - AYR (BRIDGE ST JN - COM PAISLEY GILMOUR STREET) |
| AYR2 | GLASGOW - AYR (COM PAISLEY GILMOUR STREET - ELR CHANGE BRAE) |
| AYR3 | GLASGOW - AYR (ELR CHANGE STONEY BRAE - ELR CHANGE DALRY) |
| AYR4 | GLASGOW - AYR (ELR CHANGE DALRY - COM BARASSIE JN) |
| AYR5 | GLASGOW - AYR (COM BARASSIE JN.- COM FORMER LOCHGREEN JN) |
| AYR6 | GLASGOW - AYR (COM FORMER LOCHGREEN JN. - AYR STAT |
| BAC2 | BARROW HILL NORTH JN TO SEYMOUR JN |
| BAC3 | ELMTON & CRESSWELL JN - SEYMOUR JN |
| BAE1 | BASINGSTOKE (WORTING JN) - SALISBURY (FISHERTON) |
| BAE2 | SALISBURY (FISHERTON)(SHORT MILE) - EXETER |
| BAG1 | BIRMINGHAM NEW ST - KINGS NORTON |
| BAG2 | KINGS NORTON - GLOUCESTER (BIRMINGHAM - GLOUCESTER LINE) |
| BAH1 | Unknown - limited data available |
| BAH2 | CRIGGLESTONE JN - BARNSLEY STN JN |
| BAK | KILMARNOCK STN JN - BARASSIE JN |
| BAL | BRIDGEND & ABERGWYNFI LINE |
| BAM1 | Unknown - limited data available |
| BAN2 | Unknown - limited data available |
| BAR | BARTON BRANCH |
| BAW | Unknown - limited data available |
| BBB | BOLTON E JN - BLACKBURN BOLTON JN (BOLTON-BLACKBURN) |
| BBD9 | Unknown - limited data available |
| BBJ | BALHAM JN - BECKENHAM JN |
| BBL | Unknown - limited data available |
| BBM | BLETCHLEY - BEDFORD MIDLAND |
| BBR | BARNHAM JN - BOGNOR REGIS |
| BBS4 | Unknown - limited data available |
| BBW | BRADLEY JN BRADLEY WOOD |
| BBZ | Unknown - limited data available |
| BCA | Unknown - limited data available |
| BCG | Unknown - limited data available |
| BCH | DALREOCH JN - BALLOCH STATION (20M857Y) (BALLOCH BRANCH) |
| BCJ | BIRMINGHAM CURVE JN - BRANSTON JN |
| BCV | BORDESLEY CURVE |
| BDH | BRENT CURVE JN - DUDDING HILL JN |
| BDL | Unknown - limited data available |
| BDM | Unknown - limited data available |
| BDN | Unknown - limited data available |
| BEA | BARNT GREEN, REDDITCH, EVESHAM & ASHCHURCH LINE |
| BEC | Unknown - limited data available |
| BEJ | EDGELEY JN NO 1 - BUXTON STATION (LNW) (BUXTON BRANCH) |
| BEN | BIDSTON E JN - NEW BRIGHTON (B'HEAD PARK-NEW BRIGHTON) |
| BEW | BEIGHTON JN - WOODHOUSE JN |
| BEX | ST JOHNS JN - CRAYFORD CREEK JN VIA BEXLEYHEATH |
| BFB | BRADFORD BRANCH |
| BFC | Unknown - limited data available |
| BFO | FORMER FLYOVER JN - FENNY STRATFORD |
| BFZ | Unknown - limited data available |
| BGD | Unknown - limited data available |
| BGE | BOLDON COLLIERY JN - GREEN LANE JN |
| BGH | Unknown - limited data available |
| BGK | BETHNAL GREEN - KINGS LYNN |
| BGL1 | BRISTOL AND GLOUCESTER LINE (GLOUCESTER YD JN - COM) |
| BGL2 | BRISTOL AND GLOUCESTER LINE (COM - BRISTOL E.) |
| BHI | BASFORD HALL JN - SYDNEY BR JN (INDEPENDENT LINES) |
| BHL | BERKS AND HANTS LINE |
| BHP | BOULTHAM JN. - PYEWIPE |
| BIB | SHIPLEY BINGLEY JN BRADFORD JN |
| BIY | Unknown - limited data available |
| BJR | BASSALEG JUNCTION & RHYMNEY LINE |
| BJW1 | BESCOT JN - WALSALL PLECK JN |
| BJW2 | WALSALL PLECK JN - RYECROFT JN |
| BJW3 | RYECROFT JN - WICHNOR JN |
| BJW4 | Unknown - limited data available |
| BKE | READING WESTBURY LINE JUNCTION - BASINGSTOKE BRANCH |
| BKS | BRANCLIFFE JNC KIRK SANDAL JNC |
| BLF | Unknown - limited data available |
| BLI1 | BRIGHTON (WEST COAST) - LITTLEHAMPTON JN |
| BLI2 | LITTLEHAMPTON JN - LITTLEHAMPTON STN |
| BLJ | SHEPCOTE LANE EAST JN - BROUGHTON LANE JN |
| BLL | BRISTOL LOOP LINE |
| BLP | BROCKENHURST - LYMINGTON PIER |
| BLW | BIRMINGHAM LOOP (WORCESTER) |
| BME1 | MINSTER EAST JN - MINSTER SOUTH JN |
| BME2 | MINSTER SOUTH JN - BUCKLAND JN |
| BMJ | BLACKFRIARS JN - METROPOLITAN JN |
| BML1 | WATERLOO (MAIN) - NORTHAM (SHORT MILE) |
| BML2 | NORTHAM (SHORT MILE) - DORCHESTER JN |
| BML3 | DORCHESTER JN - WEYMOUTH |
| BNE | BENTON NORTH JN - EARSDON JN |
| BNG | GROVE PARK JN - BROMLEY NORTH |
| BNW | BOLDON NEW CURVE : BOLDON EAST JN - BOLDON NORTH JN |
| BNY1 | Unknown - limited data available |
| BNY2 | Unknown - limited data available |
| BOC1 | BOLSOVER COLLIERY |
| BOH | BOWESFIELD JN - HARTBURN JN |
| BOK1 | BROAD STREET - CAMDEN ROAD JN |
| BOK2 | CAMDEN RD JN - KENSAL GREEN JN |
| BOK3 | KENSAL GREEN JN - WILLESDEN HIGH LEVEL JN |
| BOK4 | WILLESDEN HIGH LEVEL JN - ACTON WELLS JN |
| BOK5 | ACTON WELLS JN - OLD KEW JN |
| BOK6 | Not in GEOGIS |
| BOO | BOWERS OPENCAST |
| BPC | BESTWOOD PARK JN - CALVERTON COLLIERY |
| BPH | Unknown - limited data available |
| BPP | Unknown - limited data available |
| BRA | BRAINTREE BRANCH |
| BRB | Unknown - limited data available |
| BRD | Unknown - limited data available |
| BRI1 | BROCKLESBY JN - ULCEBY NORTH JN |
| BRI2 | ULCEBY NTH JN - IMMINGHAM DOCK (ABP) |
| BRL | BRISTOL RELIEF LINE |
| BRW | Unknown - limited data available |
| BRY | BARRY LINE |
| BSF | BATTERSEA PIER TO FACTORY JUNCTION |
| BSJ | BOOTLE JN X-OVER (BOOTLE BCH-SOUTHPORT LINE) |
| BSP1 | BATTERSEA PIER JN - LONGHEDGE A JN VIA STEWARTS |
| BSP2 | LONGHEDGE B JN - POUPARTS JN |
| BSW | BRISTOL & SOUTH WALES UNION LINE |
| BTC | BLACKHEATH JN - CHARLTON JN |
| BTH1 | SOUTH BERMONDSEY JN - SUTTON JN |
| BTH2 | SUTTON JN - EPSOM JN |
| BTH3 | EPSOM JN - HORSHAM JN |
| BTJ | BRIGHTSIDE - TREETON JN |
| BTK1 | Unknown - limited data available |
| BTK3 | Unknown - limited data available |
| BTK4 | Unknown - limited data available |
| BTL | BRIGHTON (EAST COAST) - LEWES JN |
| BUT | Unknown - limited data available |
| BUX | BUXTON - BRIGG'S SDGS(HINDLOW)(BUXTON & HIGH PEAK JN LINE) |
| BWC | BEDLINGTON JN - WOODHORN COLLIERY (4M220Y TO 4M300Y) |
| BWO1 | ASHINGTON JNC - BUTTERWELL OPEN CAST |
| BYL | DUBBS JN - BYREHILL JN |
| CAL | CALLINGTON BRANCH |
| CAM | CARDIFF & MERTHYR LINE |
| CAN | CARMARTHEN & NEWCASTLE EMLYN LINE |
| CAR | CARDIFF & RHYMNEY LINE |
| CAT | BRIXTON JN - SHORTLANDS JN (CATFORD LOOP) |
| CAW | CRICKLEWOOD CVE JN - ACTON WELLS JN |
| CBC1 | CARNFORTH NTH JN - BRANSTY (74M 73CH) |
| CBC2 | BRANSTY - MARYPORT (12M 05CH) |
| CBC3 | MARYPORT 0MP - CARLISLE SOUTH JN |
| CBD1 | CUMBERNAULD LINE (GARTCOSH JN - GARNQUEEN NORTH |
| CBD2 | CUMBERNAULD LINE (GARTCOSH JN - SIGHTHILL EAST JN. |
| CBI | Unknown - limited data available |
| CBM | CANNON STREET - BOROUGH MARKET JN |
| CBR1 | CASTLE BROMWICH JN - PARK LANE JN |
| CBR2 | PARK LANE JN - RYECROFT JN |
| CCB1 | RECTORY JN - COTGRAVE COLLIERY |
| CCB2 | Unknown - limited data available |
| CCG2 | CROXLEY GREEN JN - CROXLEY GREEN |
| CCH | CAMBRIDGE HAUGHLEY JNC |
| CCL | CASTLE CARY AND LANGPORT LINE |
| CCN | Unknown - limited data available |
| CCS1 | ROCK FERRY S JN - BIRKENHEAD WOODSIDE (CHESTER-B'HEAD RLY) |
| CCS2 | GREEN LANE JN - CAVENDISH SDGS (CHESTER-B'HEAD RLY) |
| CDC1 | LADYBANK JN - HILTON JN (LADYBANK JN - COM BRIDGE OF EARN) |
| CDC2 | LADYBANK JN - HILTON JN (COM BRIDGE OF EARN - HILTON JN) |
| CDM1 | CASTLEFIELD JN-ALTRINCHAM (CASTLEFIELD-ALTRINCHAM LINE) |
| CDM2 | ALTRINCHAM - MICKLE TRAFFORD (ALTRINCHAM-CHESTER LINE) |
| CEC | CARNFORTH E JN - CARNFORTH STN JN |
| CEJ | CARDIFF EAST JUNCTION LINE |
| CEM | CLIPSTONE EAST JN - MANSFIELD COLLIERY |
| CFM | CHURCH FENTON NORTH JN MICKLEFIELD JN |
| CFP | CANONBURY WEST JN - FINSBURY PARK |
| CGJ1 | CREWE (159MP) - WEAVER JUNCTION |
| CGJ2 | WEAVER JN - WARRINGTON |
| CGJ3 | WARRINGTON - WINWICK JN |
| CGJ4 | WINWICK JN - GOLBORNE JN |
| CGJ5 | GOLBORNE JNC - PRESTON |
| CGJ6 | PRESTON - LANCASTER |
| CGJ7 | LANCASTER - CARLISLE |
| CHL | CHELTENHAM LOOP |
| CHM | CHANNELSEA NORTH HIGH MEADS |
| CHR | CHESTERFIELD ROTHERHAM (TAPTON JN TO MASBOROUGH) |
| CHS | CRIGGLESTONE JN HORBURY JN |
| CHW1 | CHESTER EAST JN - WALTON OLD JN |
| CHW2 | WALTON OLD JNC - WARRINGTON STH JNC |
| CIL | SALOP GDS JN - CREWE N JN (CHESTER INDEPENDENT LINE) |
| CJA1 | COPYHOLD - HAYWARDS HEATH (ARDINGLY BRANCH) |
| CJA2 | COPYHOLD - ARDINGLY |
| CJC | CLAPTON JNC - CHINGFORD |
| CJL | LUDGATE JN - LATCHMERE JN NO 2 |
| CJS | CARCROFT JN STAINFORTH JNC |
| CKL | CULVERT ROAD JN - LATCHMERE JN |
| CKT | CRAIGLOCKHART JN - SLATEFORD JN |
| CLL | CARDIFF LECKWITH LOOP |
| CLN3 | Unknown - limited data available |
| CLV | Unknown - limited data available |
| CLY | LARKFIELD JN FOR CENTRAL STN - SHIELDS JUNCTION |
| CMD1 | MACCLESFIELD STN - MLGE CHANGE(HARECASTLE) |
| CMD2 | MILEAGE CHANGE HARECASTLE - COLWICH |
| CMG | Unknown - limited data available |
| CMJ | Unknown - limited data available |
| CMM | Unknown - limited data available |
| CMP | Unknown - limited data available |
| CMP1 | CREWE NTH JN - EDGELEY JN NO 1 (CREWE-STOCKPORT LINE) |
| CMP2 | EDGELEY JN NO 1 - MANCHESTER PICCADILLY (STOCKPORT - MANCHESTER LINE) |
| CMS | CARMUIRS WEST JN - CARMUIRS EAST JN. |
| CNB1 | PEAK FOREST JN - CHINLEY N JN (ROWSLEY-NEW MILLS LINE) |
| CNB2 | PEAK FOREST JN - BUXTON JN (BLACKWELL MILLS CURVE) |
| CNB3 | MILLERS DALE JN - BUXTON CURVE JN (BUXTON BCH) |
| CNB4 | BUXTON CURVE JN - BUXTON SDGS(BUXTON CURVE) |
| CNC | CATHCART NORTH JN - CATHCART EAST JN |
| CND2 | Unknown - limited data available |
| CNH1 | CREWE NORTH JN - CHESTER EAST JN |
| CNH2 | CHESTER EAST JN - CHESTER SOUTH JN |
| CNH3 | CHESTER SOUTH JN - HOLYHEAD |
| CNL | SHIELDS JN FOR BELLAHOUSTON - PAISLEY CANAL STATION |
| CNN | COVENTRY NTH JN - NUNEATON STH JN |
| CNS | CARPENTERS ROAD NORTH TO CARPENTERS ROAD SOUTH |
| CNW | CARMARTHEN WEST LOOP |
| CNW- | Unknown - limited data available |
| CNX | CLIFTON AND AVONMOUTH LINE |
| COC | COLCHESTER - CLACTON |
| COL | LONDON RD JN - ORDSALL LANE JN (MSJ&A LINE) |
| CON1 | CONTAINER BASE BNCH (PART 1) |
| CON2 | CONTAINER BASE BCH (PART 2) |
| CON3 | CONTAINER BASE BCH. (PART 3) |
| COS1 | Unknown - limited data available |
| CPH | CRAIGENTINNY - POWDERHALL |
| CPI2 | Unknown - limited data available |
| CPL | CARDIFF PENARTH LOOP |
| CPM1 | PONTEFRACT W JN - FORMER CUTSYKE JN |
| CPM2 | FORMER CUTSYKE JN - CASTLEFORD W JN |
| CRA | CRAYFORD SPUR B JN - CRAYFORD SPUR A JN |
| CRC1 | CAMDEN ROAD JN - CAMDEN JN PART 1 |
| CRC2 | CAMDEN ROAD JN - CAMDEN JN PART 2 |
| CRE | Unknown - limited data available |
| CRF1 | FREIGHT TERMINAL JN - COM (KINGS CROSS INCLINE) |
| CRF2 | COM - CAMDEN ROAD EAST JN |
| CRG | Unknown - limited data available |
| CRL | CLARBESTON ROAD & LETTERSTON LINE |
| CRN | Unknown - limited data available |
| CRR1 | CHESTER WEST JN - HOOTON JN (CHESTER-BIRKENHEAD LINE) |
| CRR2 | HOOTON JN - ROCK FERRY STN (STH END) (CHESTER-BIRKENHEAD LINE) |
| CRS | SHERINGHAM - CROMER |
| CRY | CARDIFF RAILWAY |
| CSG | CREWE S.S.SOUTH - CREWE S.S.NORTH (UP LINES) - GRESTY LANE |
| CSM1 | CHISLEHURST JN - ST.MARY CRAY |
| CSM2 | CHISLEHURST JN - HAWKWOOD JN (UP CHATHAM LOOP) |
| CSM3 | HAWKWOOD JN - ST. MARY CRAY JN (UP CHATHAM LOOP) |
| CSN | COWLAIRS EAST JN - COWLAIRS NORTH JN |
| CSP | CARSTAIRS STATION JN - CARSTAIRS EAST JN |
| CST | CARPENTERS ROAD NORTH JNC TO STRATFORD CENTRAL JNC WEST |
| CSW | METROPOLITAN JN - CANNON STREET SOUTH JN |
| CTC | CATHCART CIRCLE (MUIRHOUSE NORTH JN - MUIRHOUSE) |
| CTH | COLNE JNC TO HYTHE JNC |
| CTL | CALDER BRIDGE JN TURNERS LANE JN |
| CTP | Unknown - limited data available |
| CUS | Unknown - limited data available |
| CWH1 | INVERKEITHING CENT JN -THORNTON SOUTH JN |
| CWH2 | INVERKEITHING CENT JN - THORNTON S.JN |
| CWH3 | INVERKEITHING C JN - THORNTON S JN |
| CWJ | CAMDEN JN - WATFORD JN (DC ELECTRIC LINES) |
| CWK1 | CANNING ST JN - BIRKENHEAD PARK (MERSEY RAIL) |
| CWK2 | BIRKENHEAD PARK - BIDSTON E JN |
| CWK3 | BIDSTON E JCN - WEST KIRBY (WEST KIRBY-SEACOMBE) |
| CWL1 | CENTRAL WALES LINE PART 1 |
| CWL2 | CENTRAL WALES LINE PART 2 |
| CWR | Unknown - limited data available |
| CWS | CLIPSTONE WEST JN - CLIPSTONE SOUTH JN |
| CWT | Unknown - limited data available |
| CYA | Unknown - limited data available |
| CYC | CHINLEY STH JN - CHINLEY E JN (CHINLEY STH CURVE) |
| CYD | Unknown - limited data available |
| DAC | EXETER AND DEVONPORT LINE |
| DAE1 | DARLINGTON PARKGATE JN - SHILDON SOUTH JN |
| DAE2 | SHILDON STH JN - WEAR VALLEY JN COM |
| DAE3 | WEAR VALLEY JN - EASTGATE (BLUE CIRCLE CEMENT) |
| DAP | DALTON JN - PARK SOUTH JN |
| DBP1 | DERBY - KINGSBURY JNC |
| DBP2 | KINGSBURY JNC - WATER ORTON |
| DBP3 | WHITACRE JCN - PROOF HOUSE VIA WATER ORTON |
| DCF | Unknown - limited data available |
| DCL | DIDCOT - BEYOND CANNOCK ROAD JN. |
| DEC | DIDCOT EAST CURVE |
| DEX | DERBY EXTENSION (PART CLOSED) INC. COLWICK NTH |
| DHF | DENBIGH HALL S JN - FLYOVER JN |
| DJH | DAISYFIELD JN - HELLIFIELD JN |
| DJO1 | DENTON JN - CROWTHORNE JN (GUIDE BRIDGE JN LINE) |
| DJO2 | CROWTHORNE JN - ASHTON OA & GB JN (OA & GB LINE) |
| DJP | DOVEY JN - PWLLHELI |
| DJW | DUFFIELD JN - WIRKSWORTH INCLINE |
| DLO | Unknown - limited data available |
| DLS | Unknown - limited data available |
| DMY | WINCHBURGH JN - DALMENY JN |
| DOC | Unknown - limited data available |
| DOK | Unknown - limited data available |
| DOL1 | DONCASTER MARSHGATE JN - WAKEFIELD 175M 32CH |
| DOL2 | WAKEFIELD 175M 32CH - LEEDS CITY STATION (C.O.M.) |
| DOL4 | Unknown - limited data available |
| DOW | DONCASTER WRAWBY |
| DPJ | (CLOSED) DUDLEY - WALSALL PLECK JN |
| DPS | Unknown - limited data available |
| DRA1 | DRAX POWER STATION - APPROACH TRACKS |
| DRA2 | DRAX POWER STATION - MGR LOOP |
| DRS1 | Unknown - limited data available |
| DRS2 | Unknown - limited data available |
| DSD | DINTING STH JN - DINTING E JN (GLOSSOP BCH) |
| DSE | EDGE HILL JN - MANCHESTER VICTORIA (L,POOL - MANCR LINE) |
| DSN1 | DARLINGTON S JN - EAGLESCLIFFE S JN |
| DSN2 | FORMER EAGLESCLIFFE N JN - C.O.M. REDCAR |
| DSN3 | C.O.M. REDCAR - SALTBURN (DARLINGTON - SALTBURN) |
| DUY | DONCASTER UP YARD |
| DVR1 | Unknown - limited data available |
| DWC | DIDCOT WEST CURVE |
| DWS | DORE WEST - DORE STATION JN |
| DWW1 | DALSTON W JN - WOOLWICH (DALSTON JN - NAVARINO) |
| DWW2 | DALSTON W JN - WOOLWICH |
| EBW | EBBW VALE BRANCH |
| ECA1 | CARSTAIRS SOUTH JN - HAYMARKET E JN (PART 1) |
| ECA2 | CARSTAIRS SOUTH JN - HAYMARKET E JN (PART 2) |
| ECA3 | CARSTAIRS S JN - HAYMARKET E JN (SLATEFORD JN - HAYMARKET E JN) |
| ECM1 | ECML KINGS CROSS - SHAFTHOLME JN |
| ECM2 | SHAFTHOLME JN - TEMPLEHIRST JN |
| ECM3 | TEMPLEHIRST JN - COLTON JN |
| ECM4 | COLTON JN - YORK STATION |
| ECM5 | YORK STATION - NEWCASTLE WEST JN |
| ECM6 | NEWCASTLE WEST JN - NEWCASTLE STATION |
| ECM7 | NEWCASTLE - BERWICK (REGIONAL BDRY) |
| ECM8 | EDINBURGH WAVERLEY STN - BERWICK (REGIONAL BOUNDARY) |
| ECM9 | EDINBURGH WAVERLEY STATION - WAVERLEY STATION LIMITS |
| ECN1 | EAST COAST NORTH (EDINBURGH PART 1) |
| ECN2 | EAST COAST NORTH (EDINBURGH PART 2) |
| ECN3 | EAST COAST NORTH (COM CAMPERDOWN - COM ST VIGEANS) |
| ECN4 | EAST COAST NORTH (ST VIGEANS COM - KINNABER COM) |
| ECN5 | EAST COAST NORTH (KINNABER COM - ABERDEEN STATION) |
| ECR | EASTLEIGH EAST JN - ROMSEY JN |
| EDC | Unknown - limited data available |
| EDE | Unknown - limited data available |
| EEA | Unknown - limited data available |
| EEE | EARLESTOWN STH JN - EARLESTOWN W JN |
| EGG1 | Unknown - limited data available |
| EGM1 | EDINBURGH & GLASGOW MAIN (QUEEN STREET STN - HAYMARKET WEST JN) |
| EGM2 | EDINBURGH & GLASGOW MAIN (HAYMARKET WEST JN. - WAVERLEY STATION LIMITS) |
| EGM3 | EDINBURGH & GLASGOW MAIN (WAVERLEY STN LIMITS - CO |
| EGM4 | EDINBURGH & GLASGOW MAIN (EDINBURGH WAVERLEY STATION) |
| EGS1 | UDDINGSTON JN - MIDCALDER JN (UDDINGSTON JN - COM MOSSEND EAST JN) |
| EGS2 | UDDINGSTON JN - MIDCALDER JN (COM MOSSEND EAST JN - MiDCALDER JN) |
| EHW | Unknown - limited data available |
| EJM | EARSDON JN - MORPETH NORTH JN |
| EJN | EDGELEY JN NO 2 - NORTHENDEN JN (CHEADLE BCH) |
| EKE | BUSBY JN - EAST KILBRIDE STN |
| ELL1 | Unknown - limited data available |
| ELL2 | Unknown - limited data available |
| ELN | ENGINE SHED JN LEEDS CITY NORTH JN |
| ELY | ELY VALLEY BRANCH |
| EMP | ELY - MARCH - PETERBOROUGH |
| EMT | EXETER AND EXMOUTH LINE |
| END | Unknown - limited data available |
| ENT | BURY STREET JN TO ENFIELD TOWN |
| ERB | Unknown - limited data available |
| ESB | EAST SOMERSET BRANCH |
| ESK | EAST SUFFOLK |
| ETC | Unknown - limited data available |
| ETF | EASTLEIGH WEST JN - FAREHAM EAST JN |
| ETN | ELY - THETFORD - NORWICH |
| ETW | Unknown - limited data available |
| EUB | Unknown - limited data available |
| EWC | ELY WEST CURVE |
| EWG | Unknown - limited data available |
| EXR | Unknown - limited data available |
| FAL1 | FALMOUTH BRANCH (PENWITHERS JN. - COM) |
| FAL2 | FALMOUTH BRANCH (COM - COM) |
| FAL3 | FALMOUTH BRANCH (COM - FALMOUTH) |
| FCO | ORMSKIRK - FARINGTON CURVE JN (ORMSKIRK - PRESTON LINE) |
| FDM | FAVERSHAM TO DOVER MARINE JN |
| FEC | FILTON EAST CURVE (FORMERLY FIL) |
| FED | FELIXSTOWE (MAIDSTONE ROAD JN) TO FELIXTOWE DOCK |
| FEL | WESTFIELD JN TO FELIXTOWE TOWN |
| FEP | FERRYHILL PELAW (LEAMSIDE BRANCH) |
| FFH2 | Unknown - limited data available |
| FGW | FOREST GATE - WOODGRANGE PARK |
| FHR1 | FARINGTON CURVE JN - ENGINE SHED JN |
| FHR2 | ENGINE SHED JN - LOSTOCK HALL JN |
| FHR3 | LOSTOCK HALL JN - BAMBER BRIDGE JN |
| FHR4 | BAMBER BR JN - BLACKBURN STATION W |
| FHR5 | BLACKBURN STATION WEST - GANNOW JN |
| FHR6 | GANNOW JN - HALL ROYD JN |
| FJH | HALTON JN - FRODSHAM JN (FRODSHAM BCH) |
| FJJ | COSHAM JN - FARLINGTON JN |
| FJL | FORD JN - LITTLEHAMPTON JN |
| FKW | FERRYBRIDGE NORTH JN - KNOTTINGLEY WEST JN |
| FLL1 | LONGHEDGE A JN - FACTORY JN |
| FLL2 | LONGHEDGE A JN - LUDGATE LINE SE/SW BOUNDARY |
| FLL3 | LUDGATE LINE SE/SW BOUNDARY TO CLAPHAM JTN WESTERN |
| FNS1 | FROME TO NORTH SOMERSET JN LINE (FROME NORTH JN - MILEAGE CHANGE) |
| FNS2 | FROME TO NORTH SOMERSET JN LINE (MILEAGE CHANGE - SOMERSET JN) |
| FOG | Unknown - limited data available |
| FOR | Unknown - limited data available |
| FOY | Unknown - limited data available |
| FRA | FROME AVOIDING LINE |
| FRY | FRIARY BRANCH |
| FSH | FISHGUARD HARBOUR LINES |
| FSS1 | FENCHURCH STREET - BARKING WEST JN |
| FSS2 | BARKING WEST JN - SOUTHEND CENTRAL STATION |
| FSS3 | SOUTHEND CENTRAL STN - SHOEBURYNESS |
| FTB | Unknown - limited data available |
| FTL | FARRINGDON JN - BLACKFRIARS |
| FUR | WORGET JN - FURZEBROOK SIDINGS |
| FWC | FILTON WEST CURVE |
| GAE | GAER BRANCH |
| GAW1 | GARW VALLEY BRANCH PART 1 |
| GAW2 | GARW VALLEY BRANCH PART 2 |
| GBK | MUIRHOUSE SOUTH JN - KILMARNOCK GB&K JN (GB&K LINE) |
| GBN | Unknown - limited data available |
| GDL | Unknown - limited data available |
| GDW | GLOSSOP - DINTING WEST JN (GLOSSOP BCH) |
| GEC | GREENFORD EAST CURVE |
| GFB | GAS FACTORY JNC - BOW JNC |
| GGE | GORGIE JN - HAYMARKET WEST JN |
| GGZ | Unknown - limited data available |
| GHE | GARTSHERRIE SOUTH JN - GARTCOSH JN |
| GHL | GREENHILL UPPER JN - GREENHILL LOWER JN |
| GIF1 | Unknown - limited data available |
| GIF2 | Unknown - limited data available |
| GIF3 | Unknown - limited data available |
| GIF4 | Unknown - limited data available |
| GJC | GANNOW JN - COLNE |
| GJH | Unknown - limited data available |
| GLA | GAERWEN - AMLWCH |
| GLT | GREEN LANE - TYNE DOCK |
| GMH | GRANGEMOUTH JN - GRANGEMOUTH BRB/FPA BDY |
| GNE | Unknown - limited data available |
| GNQ1 | Unknown - limited data available |
| GNQ2 | Unknown - limited data available |
| GNQ3 | Unknown - limited data available |
| GNT | GARNANT BRANCH |
| GOB | Unknown - limited data available |
| GOC | Unknown - limited data available |
| GOJ | GOSPEL OAK JN - JUNCTION RD JN |
| GOU1 | WALLNEUK JN - GOUROCK STN (WALLNEUK JN - COM STONYBRAE) |
| GOU2 | WALLNEUK JN - GOUROCK STN (COM STONYBRAE - GOUROCK STN) |
| GRD | GREETLAND JN DRYCLOUGH JN |
| GRE | GRAHAM ROAD CURVE |
| GRS1 | BARKSTON SOUTH JN - 112MP (GRANTHAM - SKEGNESS LINE) |
| GRS2 | 112MP - BOSTON SLEAFORD LINE JN (GRANTHAM - SKEGNESS LINE) |
| GRS3 | BOSTON SLEAFORD LINE JN - FIRSBY EAST JN (GRANTHAM - SKEGNESS LINE) |
| GRS4 | FIRSBY EAST JN - SKEGNESS (GRANTHAM - SKEGNESS LINE) |
| GRW | Unknown - limited data available |
| GSD | Unknown - limited data available |
| GSG | GRESTY LANE NO 1 - SALOP GOODS JN (SALOP LINES) |
| GSJ1 | GALTON JN - SMETHWICK JN |
| GSJ2 | SMETHWICK JN - STOURBRIDGE JN |
| GSM1 | KETTERING NORTH JN - MANTON JN |
| GSM2 | MANTON JN - MELTON JN |
| GSM3 | SYSTON SOUTH JUNCTION - MELTON JUNCTION |
| GSM4 | MELTON JUNCTION - NOTTINGHAM |
| GSW | KILMARNOCK GBK JN - GRETNA JN (G&SW LINE) |
| GTW1 | GUILDFORD NORTH JN - ASH JN (SITE OF) |
| GTW2 | ASH JN (SITE OF) - WOKINGHAM JN |
| GUE2 | ESHOLT JN TO DOCKFIELD JN (GUISELEY - SHIPLEY) |
| GWA | GWAUN-CAE-GURWEN BRANCH |
| GXO | Unknown - limited data available |
| HAC | HARWORTH COLLIERY |
| HAF | Unknown - limited data available |
| HAG | HAMWORTHY JN - HAMWORTHY GOODS |
| HAH1 | BELASIS LANE JCN TO MILEAGE CHANGE (HAVERTON HILL BRANCH) |
| HAH2 | END OF BRANCH TO MILEAGE CHANGE (HAVERTON HILL BRANCH) |
| HAJ | ARDWICK JN - LM/ER BDY (DUNFORD BRIDGE)(MCR-SHEFFIELD LINE) |
| HAM | SURBITON (DN HAMPTON CRT LINE JN) - HAMPTON COURT |
| HAN | HANWELL LOOP |
| HAU | HABROUGH JNC ULCEBY SOUTH JNC |
| HAY1 | YORK SKELTON JN - 18M 60CH |
| HAY2 | 18M 60CH - HARROGATE STATION |
| HBL | HEST BANK JN - BARE LANE JN |
| HBS | HULL BRIDLINGTON SEAMER |
| HCD | HOLMES CHORD (ROTHERHAM) |
| HCM2 | STOKE - MARKET DRAYTON (VIA APEDALE JNC & MADELEY) |
| HCM3 | MADELEY CHORD REVERSING SDGS TO MADELEY |
| HCN | HARTFORD CLC JN - HARTFORD JN |
| HDB | HERTFORD NORTH LOOP |
| HDC | HEREFORD CURVE (RED HILL JN TO ROTHERWAS JN) |
| HDR | HITHER GREEN JN - DARTFORD - ROCHESTER BRIDGE JN |
| HDT | HACKNEY DOWNS N JN TO CHESHUNT JN VIA SOUTHBURY |
| HDY | HENDY LOOP |
| HEB | HERTFORD EAST BRANCH |
| HEG | HARTFORD EAST JN - HARTFORD NTH JN |
| HEM | Unknown - limited data available |
| HEN | HENLEY-ON-THAMES BRANCH |
| HGC | HAZEL GROVE E JN - HAZEL GROVE HIGH LEVEL JN |
| HGG1 | HURST GREEN JN - EAST GRINSTEAD |
| HGL1 | HIGHLAND LINE PERTH SOUTH JN - STANLEY JN |
| HGL2 | HIGHLAND LINE STANLEY JN - INVERNESS STN |
| HHH | BLACKFRIARS - HERNE HILL SOUTH JN |
| HHJ | HOOTON JN - HELSBY JN (HOOTON - HELSBY LINE) |
| HHT | HERNE HILL SOUTH JN - TULSE HILL SOUTH JN |
| HHW | HATTON NORTH JN - HATTON WEST JN |
| HIL | Unknown - limited data available |
| HIM | SHIREBROOK EAST JN - HIGH MARNHAM |
| HIW | Unknown - limited data available |
| HJB | HEXTHORPE JNC BENTLEY JNC |
| HJM | HEPSCOTT JN - MORPETH JN |
| HJS | HESSLE ROAD JUNCTION TO SALTEND. |
| HJW | HOUNSLOW JN - WHITTON JN |
| HLF1 | HALL LANE JN TO FOXLOW JN (MILEAGE CHANGE - HALL LANE JN) |
| HLF2 | HALL LANE JN TO FOXLOW JN (MILEAGE CHANGE - FOXLOW JN) |
| HLK | HIGH LEVEL BRIDGE JN TO KING EDWARD BRIDGE SOUTH JN |
| HLL | HEATHROW LINK LINE |
| HMN1 | HAMILTON CIRCLE PART 1 |
| HMN2 | HAMILTON CIRCLE PART 2 |
| HNB | HENDON BRANCH (RYHOPE GRANGE JN TO SOUTH DOCK) |
| HNC | HAMBLETON NORTH CURVE |
| HNL1 | HEREFORD & NEWPORT LINE (REDHILL JN - NEWPORT) |
| HNL2 | Unknown - limited data available |
| HNO | HARTFORD NORTH JN - OAKLEIGH SIDING |
| HNR | HANSLOPE JN VIA NORTHAMPTON - RUGBY |
| HNS | HEATON NORRIS JN - GUIDE BR STN JN |
| HOB2 | Unknown - limited data available |
| HOK | Unknown - limited data available |
| HOS | HOLGATE JN SKELTON JN |
| HOT | Unknown - limited data available |
| HOU | BARNES JN - FELTHAM JN (VIA HOUNSLOW) |
| HPC | HARE PARK JN CROFTON WEST JN |
| HPW | HARRINGAY PARK JNC - HARRINGAY WEST |
| HSA | HATTON - STRATFORD UPON AVON |
| HSC | HAMBLETON SOUTH CURVE |
| HSE | DOVER ARCHCLIFFE JN - HAWKESBURY STREET JN |
| HSJ | SNOW HILL - SMETHWICK LINE |
| HST | HIGH STREET JN - SHIELDS JN (CITY & UNION LINE) |
| HTG | HOO JN - GRAIN |
| HTM | Unknown - limited data available |
| HTW | Unknown - limited data available |
| HUE | Unknown - limited data available |
| HUL1 | HULL STATION - SELBY (PART OF HULL - LEEDS LINE) |
| HUL2 | SELBY - SELBY SOUTH JN (PART OF HULL - LEEDS LINE) |
| HUL3 | SELBY SOUTH JN - AREA BDY MICKLEFIELD (PART OF HULL - LEEDS LINE) |
| HUL4 | AREA BDY MICKLEFIELD TO LEEDS CITY STATION (PART OF HULL - LEEDS LINE) |
| HUN | HUNTERSTON LOW LEVEL BRANCH |
| HWG | HARTFORD WEST JN - HARTFORD NTH JN |
| HXS1 | L'POOL CENT - HUNTS CROSS W JN (MERSEY RAIL) |
| HXS2 | SANDHILLS JN - L'POOL CENT (PEMBERTON-L'POOL LINE) |
| HXS3 | SANDHILLS JN - SOUTHPORT (L'POOL - SOUTHPORT LINE) |
| HYD | HYNDLAND NORTH JN.- HYNDLAND WEST JN. |
| HYT | Unknown - limited data available |
| IGE | INVERKEITHING EAST JN - INVERKEITHING NORTH JN |
| ILK1 | APPERLEY JN - BURLEY (FORMER JN) (ILKLEY BRANCH) |
| ILK2 | BURLEY - ILKLEY |
| IOW | RYDE PIER HEAD - SHANKLIN (ISLE OF WIGHT) |
| IPD | Unknown - limited data available |
| JAT | WATERLOO INTERNATIONAL TERMINAL APPROACHES |
| JAW1 | PELAW JN - JARROW |
| JCA | JOAN CROFT JN APPLEHURST JN |
| JER | JERSEY MARINE LOOP |
| JRT1 | CARLTON RD JN (TOTTENHAM LINES) - MORTIMER ST JN |
| JRT2 | MORTIMER ST JN - JUNCTION RD JN |
| JVN | Unknown - limited data available |
| JWT | Unknown - limited data available |
| JYL | Unknown - limited data available |
| KBC | Unknown - limited data available |
| KBF | Unknown - limited data available |
| KBS1 | KIRKHAM NTH JN - BLACKPOOL CENTRAL (COASTAL ROUTE) |
| KBS2 | Unknown - limited data available |
| KCH1 | Unknown - limited data available |
| KCH2 | Unknown - limited data available |
| KCS1 | KIDSGROVE JN - CREWE SOUTH JN |
| KEB | KING EDWARD BRIDGE EAST JN TO NORTH JN |
| KEH | Unknown - limited data available |
| KES | KNOTTINGLEY EAST JN SOUTH JN |
| KGC | KENSAL GREEN JN - WILLESDEN (CITY LINES) |
| KGW | Unknown - limited data available |
| KHL | NEWTON WEST JN - CATHCART WEST JN |
| KID1 | Unknown - limited data available |
| KIL1 | KILLINGHOLME BRANCH (IMMINGHAM WEST JN (WEST)TO MILEAGE CHANGE) |
| KIL2 | KILLINGHOLME BRANCH (MILEAGE CHANGE TO END OF BRANCH) |
| KIL3 | Unknown - limited data available |
| KJE1 | KEYMER JN - SITE OF OLD SOUTHERHAM JN (SHORT MP) |
| KJE2 | SITE OF OLD SOUTHERHAM JN (SHORT MP) - SOUTHERHAM |
| KJE3 | SOUTHERHAM JN - EASTBOURNE STN |
| KJW | KINGSBURY JN - WHITACRE JN |
| KMG2 | Unknown - limited data available |
| KNE1 | CLACKMANNAN - KINCARDINE JN - ELBOWEND JN |
| KNE2 | ELBOWEND JN - CHARLESTOWN JN |
| KPS | Unknown - limited data available |
| KSH | Unknown - limited data available |
| KSL | KNIGHTON SOUTH JN - LEICESTER JN (BURTON) |
| KWD | Unknown - limited data available |
| KWS | KNOTTINGLEY WEST JN SHAFTHOLME JN |
| KYL | DINGWALL JN - KYLE OF LOCHALSH STN |
| LAN2 | Unknown - limited data available |
| LAV | LAVERSTOCK NORTH JN - LAVERSTOCK SOUTH JN |
| LBC | LONDON BRIDGE (PLATS. 14 - 16) - BRICKLAYERS ARMS |
| LBE1 | LEEDS HOLBECK W JN - COM (LAISTERDYKE) |
| LBE2 | LAISTERDYKE COM - 190M 50CH |
| LBE3 | 190M 50CH - 191M 30CH |
| LBE4 | 191M 30CH - MILL LANE JN BRADFORD |
| LBW | LONDON BRIDGE (PLATS. 7 - 13) - WINDMILL BRIDGE JN |
| LCH | LEWISHAM EAST JN (LADYWELL LN) - HAYES |
| LCJ | Unknown - limited data available |
| LCN | LOSTOCK JN - CROW NEST JN (LOSTOCK - PEMBERTON LINE) |
| LCS | Unknown - limited data available |
| LDZ | Unknown - limited data available |
| LEC1 | LONDON EUSTON - RUGBY TRENT VALLEY JCN |
| LEC2 | RUGBY T V JNC - STAFFORD SOUTH |
| LEC3 | STAFFORD STATION AREA |
| LEC4 | STAFFORD NORTH - CREWE 157M20C |
| LEC5 | CREWE STATION |
| LED | LITTLE EATON JN - DENBY |
| LEE | LEE JN - LEE SPUR JN |
| LEH1 | LEEDS WORTLEY JN - FORMER PANNAL JN |
| LEH2 | FORMER PANNAL JN-FORMER CRIMPLE JN |
| LEH3 | FORMER CRIMPLE JN - HARROGATE STATION |
| LEJ | LEATHERHEAD JN - EFFINGHAM JN |
| LEL | LIFFORD EAST JN - LIFFORD WEST JN |
| LEN2 | NORTHALLERTON HIGH JN - EAST LOW JN |
| LEN3 | EAST LOW JN - NEWCASTLE EAST JN VIA HARTLEPOOL |
| LFL | Unknown - limited data available |
| LFS1 | LARKFIELD JN FOR MUIRHOUSE-MUIRHOUSE S.JN |
| LFS2 | LARKFIELD JN FOR MUIRHOUSE-MUIRHOUSE S.JN |
| LGS1 | KILWINNING JN - LARGS (KILWINNING JN - HOLM JN). |
| LGS2 | KILWINNING JN - LARGS (HOLM JN - LARGS) |
| LHJ | Unknown - limited data available |
| LHL | FARINGTON JN - LOSTOCK HALL JN |
| LHS1 | Unknown - limited data available |
| LIJ | Unknown - limited data available |
| LIL | LISKEARD LOOP |
| LJT1 | LLANDUDNO JN - BLAENAU FFESTINIOG |
| LJT2 | BALA - TRAWSFYNYDD CEGB SDG - BLAENAU FFESTINIOG |
| LLA | LLANDEILO LINE |
| LLG | W LONDON JN - SUDBURY JN (2M59) LOW LEVEL GOODS |
| LLI | SALOP GDS JN - CREWE COAL YARD (LIVERPOOL INDEPENDENT LINES) |
| LLJ | LLANDUDNO JUNCTION - LLANDUDNO |
| LLL | PARKS BRIDGE JN - LADYWELL JN |
| LLP2 | BOROUGHBRIDGE RD LC - EAST LOW JUNCTION |
| LLS1 | HIGH MEADS JN - TEMPLE MILLS EAST JCN |
| LLS2 | LEA JN - HIGH MEADS JN |
| LNK | LANARK JN - LANARK STATION |
| LOC | LOUGHBOROUGH JN - CANTERBURY RD JN |
| LOF | Unknown - limited data available |
| LOO | LOOE BRANCH |
| LRK | Unknown - limited data available |
| LSC1 | LEAMINGTON SPA JN - MILVERTON |
| LSC2 | MILVERTON - COVENTRY SOUTH JN |
| LSN | LENTON SOUTH JN - LENTON NORTH JN |
| LSS | LANDOR ST - ST ANDREWS JN (FORMERLY PART OF SKN) |
| LTC | LOUGHBOROUGH JN - CAMBRIA JN |
| LTH | TULSE HILL JN (LEIGHAM LINE) - LEIGHAM JN |
| LTN1 | LIVERPOOL STREET - TROWSE LOWER JN |
| LTN2 | TROWSE LOWER JN - NORWICH |
| LTR | LLANTRISANT BRANCH |
| LTV | LICHFIELD TV JN - LICHFIELD TRENT VALLEY |
| LUD1 | Unknown - limited data available |
| LUD2 | Unknown - limited data available |
| LVS | Unknown - limited data available |
| LVT | TANNERS HILL JN - LEWISHAM VALE JN |
| MAC3 | DEEPCAR (BSC) - CLEETHORPES |
| MAH | MANNINGTREE - HARWICH |
| MAI | MAINDEE EAST LOOP |
| MAJ | HUNTS CROSS W JN - MANCHESTER CEN (CLC LPOOL-MANCR LINE) |
| MAN1 | Unknown - limited data available |
| MAS | TOTLEY TUNNEL EAST - CHINLEY NTH JN |
| MAX | Unknown - limited data available |
| MBW1 | MIDDLESBROUGH WHITBY (GUISBOROUGH JN - BATTERSBY JN) |
| MBW2 | MIDDLESBROUGH WHITBY (BATTERSBY TO GROSMONT JNC) |
| MBW3 | MIDDLESBROUGH WHITBY (GROSMONT JNC - WHITBY) |
| MCG | CARLISLE CURROCK JN - ROME ST JN |
| MCH | CHEADLE HULME JN - MACCLESFIELD STN |
| MCJ1 | MARYLEBONE - BR/LTE BOUNDARY (197M 05CH) |
| MCJ2 | LTE/BR BOUNDARY VIA QUAINTON ROAD -VERNEY JN |
| MCJ3 | ANNESLEY - CALVERT JCN - QUAINTON ROAD JCN |
| MCJ4 | CALVERT - CLAYDON LNE JUNCTION |
| MCL | MOORGATE - CARLTON RD JN (MOORGATE LINES) |
| MDE | MOSSEND SOUTH JN FOR HOLYTOWN - MOSSEND EAST JN |
| MDL1 | THORNHILL LNW JN - HOLBECK EAST JN |
| MDN | MOSSEND N JN - MOSSEND E JN (FOR HOLYTOWN JN) |
| MDW | MOSSEND SOUTH JN (FOR UDDINGSTON)- MOSSEND WEST JN |
| MDY | Unknown - limited data available |
| MEB1 | MOORGATE BRANCH |
| MEB2 | Unknown - limited data available |
| MED | Unknown - limited data available |
| MEN1 | MUIRHOUSE STH JN - EGLINTON ST JN. SECTION 1 |
| MEN2 | MUIRHOUSE STH JN - EGLINTON ST JN. SECTION 2 |
| MEW1 | METHLEY JN - METHLEY JN FOR WHITWOOD |
| MEW2 | METHLEY JN FOR WHITWOOD - WHITWOOD JN |
| MGE | MILNGAVIE JN (WESTERTON) - MILNGAVIE STATION |
| MGW | MILFORD JN - GASCOIGNE WOOD JN |
| MHH | MORECOMBE JN - HEYSHAM HARBOUR |
| MHL1 | MONKTONHALL JN - MILLERHILL YARD SECTION 1 |
| MHL2 | MONKTONHALL JN - MILLERHILL YARD SECTION 2 |
| MHL3 | MONKTONHALL JN - MILLERHILL YARD SECTION 3 |
| MHY | NIDDRIE WEST JN FOR NIDDRIE NORTH - NIDDRIE SOUTH |
| MIA | MANCHESTER INTERNATIONAL AIRPORT RAIL LINK |
| MIL | MILFORD HAVEN BRANCH |
| MIR1 | MANN ISLAND JN - MANN ISLAND JN (LIVERPOOL LOOP LINE) |
| MIR2 | MANN ISLAND JN - ROCK FERRY STN (STH END)(MERSEY RAIL) |
| MIT | Unknown - limited data available |
| MJI1 | MADELEY JN - LIGHTMOOR JN |
| MJI2 | KETLEY JN - LIGHTMOOR JN - IRONBRIDGE |
| MJS1 | MELBOURNE JN - SINFIN - CHELLASTON EAST JCN |
| MJT1 | MANSFIELD JN - RADFORD JN |
| MJT2 | RADFORD JN - TROWELL JN |
| MJW | Unknown - limited data available |
| MKB1 | Unknown - limited data available |
| MKB2 | Unknown - limited data available |
| MLA | Unknown - limited data available |
| MLG1 | FORT WILLIAM JN. - MALLAIG SECTION 1 |
| MLG2 | FORT WILLIAM JN. - MALLAIG SECTION 2 |
| MLN1 | PADDINGTON-BRISTOL-PENZANCE (PADDINGTON - COM PLYMOUTH STN WEST) |
| MLN2 | PADDINGTON-BRISTOL-PENZANCE (COM PLYMOUTH STN. WEST - COM ST.GERMANS) |
| MLN3 | PADDINGTON-BRISTOL-PENZANCE (COM ST.GERMANS - COM CHACEWATER) |
| MLN4 | PADDINGTON-BRISTOL-PENZANCE (COM CHACEWATER - PENZANCE LINE) |
| MOA | Unknown - limited data available |
| MOB | Unknown - limited data available |
| MPC | MOTSPUR PARK JN - CHESSINGTON SOUTH |
| MPR1 | MILES PLATTING STN JN - THORPES BRIDGE JN |
| MPR2 | THORPES BRIDGE JN - OLDHAM WERNETH JN |
| MPR3 | OLDHAM WERNETH JN - ROCHDALE E JN |
| MRB | MILNER ROYD JN BRADFORD |
| MRH | MACCLESFIELD - MARPLE WHARF JN |
| MRJ | Unknown - limited data available |
| MRL1 | COWLAIRS W JN - KNIGHTSWOOD N JN SECTION 1 |
| MRL2 | COWLAIRS W JN - KNIGHTSWOOD N JN SECTION 2 |
| MSC | Unknown - limited data available |
| MSL | Unknown - limited data available |
| MSM | MORECAMBE SOUTH JN - MORECAMBE |
| MSW | MINSTER WEST JN - MINSTER SOUTH JN |
| MTE | Unknown - limited data available |
| MTL1 | Unknown - limited data available |
| MTL2 | Unknown - limited data available |
| MVE1 | MANCHESTER VIC STN - BOLTON STN (MANCHESTER-BOLTON LINE) |
| MVE2 | BOLTON STN - EUXTON JN (BOLTON-EUXTON LINE) |
| MVL1 | MILES PLATTING JN - STALYBRIDGE JN (ASHTON BRANCH) |
| MVL2 | STALYBRIDGE JN - STALYBRIDGE STN |
| MVL3 | STALYBRIDGE STN - HEATON LODGE JN |
| MVL4 | Unknown - limited data available |
| MVM | MANCHESTER VIC STN - MILES PLATTING JN |
| MVN1 | Unknown - limited data available |
| MVN2 | THORPES BRIDGE JN - NORMANTON (MANCHESTER - NORMANTON LINE) |
| MWB | MARLOW BRANCH |
| MWC | Unknown - limited data available |
| MWJ | MARCHEYS HOUSE JN - WINNING COLLIERY CROSSING JN |
| MWL | MARCH WEST JNC - MARCH WHITEMOOR JNC |
| MWN | MARSH WEST JNC TO GRIMSBY DOCKS |
| MWY | MWYNDY BRANCH |
| MWZ | Unknown - limited data available |
| MYC | Unknown - limited data available |
| MYL | Unknown - limited data available |
| NAB | NEATH AND BRECON LINE |
| NAJ1 | NEASDEN SOUTH JN - NORTHOLT JN |
| NAJ2 | NORTHOLT JCN - ASHENDON JCN |
| NAJ3 | ASHENDON JN - AYNHO JN |
| NAY | BRUNDALL JN - ACLE - YARMOUTH |
| NBB | NEW BECKENHAM JN - BECKENHAM JN |
| NBE | END OF LINE BATHGATE YARD - NEWBRIDGE JUNCTION |
| NBK | DREM JN - NORTH BERWICK STN |
| NBS | NORTON BRIDGE JN - STONE JN |
| NCP | Unknown - limited data available |
| NCS | COURTHILL LOOP JN NORTH - COURTHILL LOOP JN SOUTH |
| NDE1 | PORTOBELLO JN (EX NIDDRIE NTH JN) TO MILLERHILL ST |
| NDN | NORTH DEVON LINE |
| NEC1 | NEWCASTLE - CARLISLE |
| NEC2 | NEWCASTLE MLGE CHGE - CARLISLE S JN |
| NEK | Unknown - limited data available |
| NEM1 | Unknown - limited data available |
| NEM2 | DRUMGELLOCH - HELENSBURGH (VIA SINGER) |
| NEM3 | DRUMGELLOCH - HELENSBURGH (VIA SINGER) COM HIGH ST |
| NEM4 | DRUMGELLOCH - HELENSBURGH (VIA SINGER) KNIGHTSWOOD |
| NEM5 | DRUMGELLOCH - HELENSBURGH (VIA SINGER) KNIGHTSWOOD |
| NEM6 | DRUMGELLOCH - HELENSBURGH (VIA SINGER) COM BOWLING |
| NEM7 | DRUMGELLOCH - HELENSBURGH (VIA SINGER) COM DUMBART |
| NEN1 | Unknown - limited data available |
| NEW | NEWQUAY BRANCH |
| NFE | NORWOOD JN (WEST CROYDON LINE) - EPSOM DOWNS |
| NGC | NETHERFIELD JN - COLWICK NORTH |
| NGD | CARLISLE LONDON RD JN - BOG JN (NEWCASTLE GOODS LINE) |
| NGJ | NEWTON LE WILLOWS JN - GOLBORNE JN (N.U.LINE) |
| NGL | HAMPTON COURT JN - GUILDFORD JN (GUILDFORD NEW LINE) |
| NHB | Unknown - limited data available |
| NHP | Unknown - limited data available |
| NJN | Unknown - limited data available |
| NKE1 | KEW EAST JN TO NEW KEW (KEW EAST - COM) |
| NKE2 | NEW KEW JN - KEW EAST JN |
| NKL | NORTH KENT EAST JN - DARTFORD JN VIA GREENWICH |
| NLF | NORWOOD JN TO LOW FELL |
| NLP | NEWLANDS LOOP |
| NMA | Unknown - limited data available |
| NMB | FAZAKERLEY JN - NORTH MERSEY GOODS (NTH MERSEY BCH) |
| NMC1 | NEW MILLS S JN - HEATON MERSEY STN JN |
| NMC2 | CHEADLE HEATH STH JN- CHEADLE JN |
| NMH | Unknown - limited data available |
| NML | Unknown - limited data available |
| NMM | NORTH MERSEY BCH JN - MARSH LANE JN |
| NMS1 | NEW MALDEN JN - FULWELL JN |
| NMS2 | FULWELL JN - SHEPPERTON |
| NNH | CATHCART WEST JN - NEILSTON |
| NOB1 | NOTTINGHAM E JN - LINCOLN 32MP |
| NOB2 | LINCOLN 32MP - COM LINCOLN |
| NOB3 | NOTTINGHAM(41.25) - BARNETBY(12.55) |
| NOC | NORMANTON COLTON JN |
| NOG1 | GRANTHAM - NETHERFIELD JN - NOTTINGHAM (PART CLOSE |
| NOG2 | NETHERFIELD JNS 2M 35CH - 2M 54CH |
| NOL | NORWICH (THORPE JN) - OULTON BROAD - LOWESTOFT |
| NOP1 | Unknown - limited data available |
| NPF | NORTH PEMBROKESHIRE & FISHGUARD LINE |
| NSA | ALDERSHOT JN SOUTH - ALDERSHOT JN NORTH |
| NSE | NEWARK SOUTH JNC EAST JNC |
| NSN | NORTHWICH SOUTH JN - NORTHWICH STATION JN |
| NSS | NORTH STAFFORD JN - STOKE JN |
| NTE | MANNINGTREE NORTH JNC - MANNIGTREE EAST JNC |
| NTL | NUNHEAD JN - LEWISHAM JN (846 & 847PTS) VIA LEWISH |
| NUJ1 | NUNNERY MAIN LINE JN - NUNNERY JN |
| NUJ2 | NUNNERY MAIN LINE JN - NUNNERY JN |
| NWE | NORTON EAST JN - NORTON WEST JN |
| NWL | Unknown - limited data available |
| NWN | NEWPORT WESTERN LOOP |
| NWO | NUNEATON NORTH JN - WHITACRE JN |
| OAJ | OAKENSHAW SOUTH JN FOR OAKENSHAW JN |
| OBN1 | CRIANLARICH JN - OBAN STATION SECTION 1 |
| OBN2 | CRIANLARICH JN - OBAN STATION SECTION 2 |
| OCL | Unknown - limited data available |
| ODT | Unknown - limited data available |
| OGM | OGMORE VALLEY BRANCH |
| OJS | OTFORD JN - SEVENOAKS JN |
| OLD | Unknown - limited data available |
| OLW | ORDSALL LANE JN - WINDSOR BRIDGE SOUTH JN |
| OME3 | Unknown - limited data available |
| ORG | Unknown - limited data available |
| OSC | OAKENSHAW SOUTH JN FOR CROFTON EAST JN |
| OVE | OGMORE VALLEY EXTENSION LINE |
| OWW | WOLVERCOT JN - DUDLEY (OXFORD WORCESTER AND WOLVER |
| OXC | STAFFORD RD JN - BUSHBURY OXLEY JN (OXLEY CHORD) |
| OXD | BLETCHLEY (FORMER BAY PLATFORM) - OXFORD N JN |
| OXO | OXCROFT OPENCAST |
| OXW | OXENHOLME JN - WINDERMERE |
| PAA1 | PIRBRIGHT JN - FARNHAM JN (SITE OF) |
| PAA2 | FARNHAM JN (SITE OF) - ALTON |
| PAC | PATCHWAY CURVE |
| PAG | Unknown - limited data available |
| PAR | PAR LOOP - PAR TO ST BLAZEY JUNCTION |
| PAS | Unknown - limited data available |
| PAT | PURLEY - CATERHAM |
| PBC | Unknown - limited data available |
| PBE | Unknown - limited data available |
| PBJ | PROOF HSE JN - BUSHBURY JN VIA BESCOT |
| PBL | PERRY BARR N JN - PERRY BARR W JN |
| PBN | PRESTON FYLDE JN - BLACKPOOL NORTH |
| PBS1 | PYE BRIDGE JN - KIRKBY SUMMIT JN |
| PBS2 | KIRKBY SUMMIT JN - MANSFIELD |
| PBS3 | MANSFIELD - LM/ER BOUNDARY |
| PDB | Unknown - limited data available |
| PED1 | PENISTONE - DONCASTER (PENISTONE JNC FORMER BARNSLEY JN) |
| PED2 | PENISTONE - DONCASTER (FORMER BARNSLEY JUNCTION - WATH 13M 33CH) |
| PED4 | PENISTONE - DONCASTER (WATH 13M 33CH - FORMER MEXBRO EAST) |
| PED5 | PENISTONE-DONCASTER (FORMER MEXBORO EAST JCN TO DONCASTER LINE) |
| PEF | FERRYBRIDGE SOUTH JN - PONTEFRACT EAST GOODS JN |
| PEH | PENISTONE HUDDERSFIELD |
| PEM | PEMBROKE & TENBY LINE |
| PHC | Unknown - limited data available |
| PJL | PARKSIDE JN - LOWTON JN (LOWTON CURVE) |
| PJW | PORTOBELLO JN - HEATH TOWN JN - CRANE STREET JN |
| PLG1 | PARK LANE JN TO FORMER HIGH ST JN |
| PLG2 | FORMER HIGH ST JN TO GREENSFIELD JN |
| PLO | PLYMOUTH LOOP NO 1 |
| PMJ | MANTON JN - PETERBOROUGH |
| PMT | POLMONT JN - LARBERT JN |
| PNS | COWLAIRS SOUTH JN - SIGHTHILL WEST JN. |
| POC1 | BILLINGHAM JN - PHILLIPS PETROLEUM DEPOT JN |
| POC2 | PHILLIPS PD JN - PORT CLARENCE BRANCH |
| POD | PORTISHEAD BRANCH |
| POR | PORTHCAWL BRANCH |
| PPA1 | PHILLIPS PARK NO 1 JN - ARDWICK JN (ARDWICK BCH) |
| PPA2 | ASHBURYS W JN - OLD MIDLAND JN (ANCOATS BCH) |
| PPA3 | ASHBURYS W JN - ASHBURYS W JN (MANCHESTER-SHEFFIELD LINE) |
| PPH | PRESTON PARK JN - HOVE |
| PPP1 | PARK STN JN - BAGULEY FOLD JN (ASHTON BCH) |
| PPP2 | PARK STN JN - PHILLIPS PARK NO 2 JN (ARDWICK BCH) |
| PPW | POINT PLEASANT JN - WIMBLEDON LTE PLATFORMS |
| PRA | PRINCES RISBOROUGH - AYLESBURY STH |
| PRC | Unknown - limited data available |
| PRL | Unknown - limited data available |
| PSE | OLD REGIONAL BDRY.TO SHIREOAKS EAST JN |
| PSF | PERRY STREET FORK JN TO SLADE GREEN JN |
| PSP | Unknown - limited data available |
| PSR2 | Unknown - limited data available |
| PTA | PENALLTA BRANCH |
| PTD | PORT TALBOT DOCKS BRANCH |
| PTH | PENARTH BRANCH |
| PVS | Unknown - limited data available |
| PWE | Unknown - limited data available |
| PWS1 | PADDOCK WOOD - MAIDSTONE WEST |
| PWS2 | STROOD JN - MAIDSTONE WEST |
| PYE1 | PYEWIPE (IMMINGHAM EAST DOCK JCN TO MILEAGE CHANGE) |
| PYE2 | PYEWIPE (MILEAGE CHANGE TO GRIMSBY DOCKS) |
| PYE3 | PYEWIPE (GRIMSBY DOCKS WITHIN ABP BOUNDARIES) |
| RAC | RADFORD JN - KIRKBY LANE END JN |
| RAD | RADYR BRANCH |
| RBS1 | RUGBY TV JNC - BIRMINGHAM NEW ST (112M-73CH) |
| RBS2 | BIRMINGHAM NEW ST - BUSHBURY JN |
| RBS3 | BUSHBURY JNC - STAFFORD |
| RBY | REEDHAM - BERNEY ARMS - YARMOUTH STATION |
| RCB | RUTHERGLEN EAST JN - COATBRIDGE JN. |
| RDB | Unknown - limited data available |
| RDG1 | WATERLOO (WINDSOR LINES) - WOKINGHAM JN |
| RDG2 | WOKINGHAM JN - READING |
| REB2 | CASTLE HILLS INNER JN - REDMIRE (TARMAC) |
| REB4 | CASTLE HILLS JN - CASTLE HILLS INNER JN |
| RED1 | STOATS NEST JN - COULSDON MILEAGE CHANGE |
| RED2 | COULSDON MILEAGE CHANGE - EARLSWOOD JN |
| REX2 | Unknown - limited data available |
| RFR | Unknown - limited data available |
| RHD1 | Unknown - limited data available |
| RHD2 | Unknown - limited data available |
| RIC1 | Unknown - limited data available |
| RJB | Unknown - limited data available |
| RNJ | READING SPUR JN TO READING NEW JN |
| ROA | Unknown - limited data available |
| ROC | Unknown - limited data available |
| ROS | Unknown - limited data available |
| ROU | ROMFORD - UPMINSTER |
| RPE | RAYNES PARK JN - EPSOM JN |
| RRN1 | RYECROFT JCN - CANNOCK |
| RRN2 | CANNOCK - RUGELEY NTH JCN |
| RSB | RHONDDA & SWANSEA BAY LINE |
| RSC | ROUNDWOOD CHORD JCN TO SILVERWOOD COLL'Y |
| RSD | Unknown - limited data available |
| RSJ | REDHILL GUILDFORD LINE JN - SHALFORD JN |
| RSL1 | LANGLOAN JN - WHIFFLET N JN SECTION 1 |
| RSL2 | LANGLOAN JN - WHIFFLET N JN SECTION 2 |
| RSW | WELSHS BRIDGE JN - ROSE ST JN |
| RTJ1 | ROMSEY JN - REDBRIDGE JN |
| RTJ2 | ROMSEY - TUNNEL JN (SALISBURY) |
| RTS | Unknown - limited data available |
| RTT | REDHILL TONBRIDGE LINE JN - TONBRIDGE WEST JN |
| RUB1 | RUFFORD JN - BILSTHORPE COLLIERY JN |
| RUB2 | BILSTHORPE CLLY JN - BILSTHORPE CLLY |
| RUD | RUDDINGTON CHORD |
| RVC | Unknown - limited data available |
| RVS1 | Unknown - limited data available |
| RWC | READING WEST CURVE |
| RYH1 | ROMILEY JN - WOODLEY JN (HAYFIELD-WOODLEY LINE) |
| RYH2 | HYDE JN - WOODLEY JN (HYDE BCH) |
| SAA | STIRLING MIDDLE JN - CLACKMANNAN |
| SAC | SETTLE JN - CARLISLE (PETTERILL BRIDGE JN) |
| SAG | ST ANDREWS JN - GRAND JN |
| SAJ | GUIDE BRIDGE W JN - STALYBRIDGE JN (STALYBRIDGE BCH) |
| SAL | WESTBURY SOUTH JN - WILTON JN |
| SAM | Unknown - limited data available |
| SAR1 | SOUTH ACTON JN - GUNNERSBURY JN |
| SAR2 | GUNNERSBURY JN - RICHMOND |
| SAS | STECHFORD SOUTH JN - ASTON SOUTH JN |
| SAW | SEVERN & WYE LINE |
| SBA1 | SUTTON BR JCN - WELSHPOOL |
| SBA2 | WELSHPOOL COM - ABERYSTWYTH |
| SBE | Unknown - limited data available |
| SBF | SHIPLEY BRADFORD FORSTER SQUARE |
| SBH1 | HUYTON JN - ST HELENS STN JN (HUYTON-ST HELENS LINE) |
| SBH2 | ST HELENS STN JN - GERARDS BRIDGE JN (ST HELENS-RAINFORD JN) |
| SBH3 | GERARDS BRIDGE JN - SPRINGS BCH JN (LANCS UNION LINE) |
| SBJ | SWANLEY JN - ASHFORD 'B' JN (VIA CHARING) |
| SBK2 | Unknown - limited data available |
| SBO | Unknown - limited data available |
| SBR | SHEPRETH BRANCH |
| SCC | SHEEPCOTE CURVE (WEST LONDON JN.- LATCHMERE NO 3 JN) |
| SCG | CARLISLE BOG JN - FORKS JN |
| SCL | SOHO E JN - SOHO NTH JN (SOHO CURVE LINES) |
| SCM1 | SCOTTISH CENTRAL (MOTHERWELL JN - COM MOSSEND S JN) |
| SCM2 | SCOTTISH CENTRAL (COM MOSSEND S JN FOR MOSSEND W JN) |
| SCM3 | SCOTTISH CENTRAL (ELR CHANGE 94M 110Y- ELR CHANGE 123M 880Y) |
| SCM4 | SCOTTISH CENTRAL (ELR CHANGE 123M 880Y- COM ST LEONARDS) |
| SCM5 | SCOTTISH CENTRAL (DUNDEE CENTRAL JN - COM ST LEONARDS) |
| SCN | Unknown - limited data available |
| SCP | SYDENHAM JN - CRYSTAL PALACE TUNNEL JN |
| SCQ1 | STOKE JN - MILTON JN -CONGLETON (PART CLOSED) |
| SCQ2 | MILTON JN - LEEK BROOK JN |
| SCQ3 | LEEK BROOK JN - CALDON QUARRY |
| SCR | SPEKE JN - GARSTON DOCKS (SPEKE & GARSTON LINE) |
| SCT1 | BOOTLE BCH JN - CANADA DOCK GOODS (BOOTLE BCH) |
| SCT2 | ATLANTIC DOCK JN - ALEXANDRA DOCK GOODS (MDHC BDY) |
| SCU1 | SOUTH CROYDON JN - UCKFIELD |
| SDC | STRATFORD COPPER MILL |
| SDI1 | BRITON FERRY UP FLYING LOOP JN/COURT SART JN - MIL |
| SDI2 | MILEAGE CHANGE SDI1/SDI2 - MORLAIS JN (SWANSEA DISTRICT LINE) |
| SDJ1 | Unknown - limited data available |
| SDJ2 | TIMPERLEY JN - DITTON NO 1 JN |
| SDP1 | ST DENYS JN - FAREHAM EAST JN |
| SDP2 | FAREHAM EAST JN - PORTCREEK JN |
| SDS | ST DENNIS BRANCH |
| SEA1 | Unknown - limited data available |
| SEC | SELBY CANAL JN - SELBY WEST JN |
| SEJ1 | SITTINGBOURNE EASTERN JN - SITTINGBOURNE MIDDLE JN |
| SEJ2 | SITTINGBOURNE MIDDLE JN - SHEERNESS |
| SEL | TINSLEY SOUTH JN - SHEPCOTE LANE WEST JN |
| SEN | SYSTON EAST JN - SYSTON NORTH JN |
| SES | SEAL SANDS BRANCH |
| SGN | COWLAIRS WEST JN - BELLGROVE JN |
| SHB | SHEFFIELD BARNSLEY |
| SHF | STRAWBERRY HILL JN - FULWELL JN |
| SHG | SHERBURN JN - GASCOIGNE WOOD JN |
| SHL | SHREWSBURY & HEREFORD LINE |
| SHR | WISHAW CENTRAL JN - SHIELDMUIR NORTH JN |
| SHS1 | SUTTON OAK JN - ST HELENS STN JN (ST HELENS LINE LINE) |
| SHS2 | Unknown - limited data available |
| SHW | SHIREOAKS WEST JN - WOODEND JN |
| SIB1 | CHESTERTON JN - FEN DRAYTON (ARC) |
| SIC1 | Unknown - limited data available |
| SIC2 | Unknown - limited data available |
| SIL | PARADISE JN - DERBY SQUARE JN (STOCK INTERCHANGE LINE) |
| SIV | ST IVES BRANCH |
| SIZ | SIZEWELL SIDINGS |
| SJB | ST JAMES JNC BRIDGE JNC |
| SJC | WENNINGTON - CARNFORTH FURNESS & MIDLAND JUNCTION |
| SJD | SKELTON JN - DEANSGATE JN (SKELTON BCH) (S95) |
| SJL2 | Unknown - limited data available |
| SJM1 | SWINTON JN - 167M 385Y (MILEAGE CHANGE) |
| SJM2 | 15M.0079Y (MILEAGE CHANGE) - 15M.0880Y |
| SJO1 | WALTON JN - SANDHILLS JN (PEMBERTON - LIVERPOOL LINE) |
| SJO2 | WALTON JN - ORMSKIRK (WALTON JN-PRESTON LINE) |
| SJS | STOURBRIDGE JN - STOURBRIDGE TOWN |
| SJT1 | Unknown - limited data available |
| SKA | SKELLOW JN ADWICK JN |
| SKB | Unknown - limited data available |
| SKM | SOUTH KIRKBY JN MOORTHORPE STATION JN |
| SKN | ST ANDREWS JN - KINGS NORTON |
| SKS1 | SKIPTON STATION NTH JN - EMBSAY JN |
| SKS2 | EMBSAY JN - GRASSINGTON (PART CLOSED) |
| SKW1 | SKIPTON - WENNINGTON JCN |
| SLJ | STREATHAM NORTH JN(LOCAL LINES) - STREATHAM SOUTH |
| SMA | SOUTH MANCHESTER AIRPORT (LINK) |
| SMJ1 | SWINTON JN TO MILFORD JN (SWINTON JCN TO DEARNE JCN) |
| SMJ2 | SWINTON JN TO MILFORD JN (DEARNE JCN TO BURTON SALMON) |
| SMJ3 | SWINTON JN TO MILFORD JN (BURTON SALMON TO MILFORD JN) |
| SMS1 | STREATHAM SOUTH JN - WIMBLEDON A JN |
| SMS2 | WIMBLEDON A JN - SUTTON WIMBLEDON LINE JN |
| SNJ | SANDBACH NORTH JN - NORTHWICH SOUTH JN - NORTHWICH |
| SNS | STREATHAM NORTH JN(MAIN LINE) - STREATHAM SOUTH |
| SNW | SLEAFORD NORTH JN WEST JNC |
| SOB1 | CHIPPENHAM JN - FORMER SNAILWELL JN |
| SOB2 | FORMER SNAILWELL JN - ELY DOCK JN (SOHAM BRANCH) |
| SOL | Unknown - limited data available |
| SOT | Unknown - limited data available |
| SOY | NORTHAM JN - SOUTHAMPTON EASTERN DOCKS |
| SPC1 | ST PANCRAS - BEDFORD |
| SPC2 | BEDFORD - WELLINGBOROUGH {SEE ALSO WYM} |
| SPC3 | WELLINGBOROUGH - WIGSTON SOUTH JN |
| SPC4 | WIGSTON SOUTH JN - LEICESTER |
| SPC5 | LEICESTER - RATCLIFFE JN |
| SPC6 | RATCLIFFE JN - SPONDON |
| SPC7 | SPONDON - DERBY LONDON RD JN |
| SPC8 | DERBY LONDON RD JN - CLAY CROSS S JN |
| SPC9 | CLAY CROSS S JN - TAPTON JN (CHESTERFIELD) |
| SPD1 | SPALDING STH JN - SLEAFORD STH JN |
| SPD2 | SLEAFORD STH JN - GREETWELL WEST JN |
| SPD3 | GREETWELL W JN - TRENT E JN (GAINSBOROUGH) |
| SPD4 | TRENT WEST JN - BESSACARR |
| SPD5 | BESSACARR - DECOY NTH JN DONCASTER |
| SPW | SPRINGBANK ROAD JN WALTON STREET JN |
| SRD | Unknown - limited data available |
| SSC | STREATHAM JN - STREATHAM COMMON JN |
| SSE | SLEAFORD SOUTH JN EAST JN |
| SSG | Unknown - limited data available |
| SSJ1 | SHEET STORES JN - CHELLASTON EAST JN |
| SSJ2 | CHELLASTON WEST JN - STENSON JN |
| SSK1 | SALTBURN W JN - SKINNINGROVE (CLEVELAND POTASH) |
| SSL | SEVEN SISTERS LOOP |
| SSP | PERRY BARR STH JN - SOHO STH (PERRY BARR/SOHO LINE) |
| SSS | Unknown - limited data available |
| SSV | SHENFIELD - SOUTHEND VICTORIA |
| STA | Unknown - limited data available |
| STB | ST BOTOLPHS BRANCH |
| STD | Unknown - limited data available |
| STF | NORTON SOUTH JN - FERRYHILL SOUTH JN |
| STO | STOKE BRANCH |
| STR1 | AYR - STRANRAER (AYR STATION - COM GIRVAN) |
| STR2 | AYR - STRANRAER (COM GIRVAN - COM FORMER CHALLOCH JN) |
| STR3 | AYR - STRANRAER (FORMER CHALLOCH JN - ELR CHANGE 53M 110Y) |
| STR4 | AYR - STRANRAER (ELR CHANGE 53M 110Y - STRANRAER) |
| STS | SOUTHERHAM JN - SEAFORD |
| STY | WILMSLOW JN - SLADE LANE JN (STYAL LINE) |
| SUB1 | PORTOBELLO JN - HAYMARKET CENT JN (SECTION 1) |
| SUB2 | PORTOBELLO JN - HAYMARKET CENT JN (SECTION 2) |
| SUD | SUDBURY BRANCH |
| SUT1 | SUTTON HARBOUR BRANCH |
| SUT2 | Unknown - limited data available |
| SWA | SWANSEA HIGH STREET BRANCH |
| SWB | SOUTH WALES AND BRISTOL DIRECT |
| SWE | STAINES JN - WINDSOR & ETON RIVERSIDE |
| SWL | SWANSEA LOOP |
| SWM | Unknown - limited data available |
| SWM1 | SOUTH WALES MAIN LINE |
| SWM2 | SOUTH WALES MAIN LINE (GLOUCESTER YD JN - NEYLAND) |
| SWP | SHIREBROOK JN - WARSOP JN |
| SWX | Unknown - limited data available |
| SWY | PATNEY AND CHIRTON TO WESTBURY (STERT AND WESTBURY LINE) |
| SYC | SHREWSBURY CREWE JN - CREWE STH JN |
| SYE | COATBRIDGE SUNNYSIDE JN - WHIFFLET SOUTH JN. |
| TAD | Unknown - limited data available |
| TAH1 | JUNCTION RD JN - SOUTH TOTTENHAM EAST JN |
| TAH2 | SOUTH TOTTENHAM E JN TO WOODGRANGE PARK JN |
| TAH3 | WOODGRANGE PARK JN TO BARKING TILBURY LINE JN |
| TAH4 | BARKING STN JUCNTION / PLATFORM ONE |
| TAT | PURLEY (CHIPSTEAD LINE) JN - TATTENHAM CORNER |
| TBD | TAFF BARGOED BRANCH |
| TBH1 | THREE BRIDGES JN - ARUNDEL JN (NORTH) |
| TBH2 | ARUNDEL JN (SOUTH) - HAVANT JN |
| TCC | TRENT EAST JN - CLAY CROSS SOUTH JN (EREWASH VALLEY) |
| TCW1 | TEMPLE HIRST JN - SELBY SOUTH JN |
| TCW3 | Unknown - limited data available |
| TEN | STANSTED EAST TO NORTH LOOP |
| TES | TRENT EAST JUNCTION TO SHEET STORES JUNCTION |
| TEY | Unknown - limited data available |
| TFN | TRIMLEY TO FELIXSTOWE NORTH BOUNDARY |
| THA | Unknown - limited data available |
| THL | TRENT SOUTH JN - TOTON JN (HL GOODS LINE) |
| THN | THAMESHAVEN BRANCH |
| THO | THORNBURY BRANCH |
| THT | TREHERBERT BRANCH |
| TJC1 | CHESTERFIELD (TAPTON JN.) TO COLNE SECTION 1 |
| TJC2 | CHESTERFIELD (TAPTON JN.) TO COLNE SECTION 2 |
| TJC3 | CHESTERFIELD (TAPTON JN.) TO COLNE SECTION 3 |
| TJG1 | THORNE JN - THORNE NORTH STN COM |
| TJG2 | THORNE NORTH STN COM - GILBERDYKE |
| TLA | STANSTED AIRPORT LINK (THIRD LONDON AIRPORT) |
| TLL | TILBURY LOOP LINE |
| TLP1 | BICKLEY JN - PETTS WOOD JN (TONBRIDGE LOOPS) |
| TLP2 | BICKLEY JN - PETTS WOOD JN (TONBRIDGE SLOW LOOPS) |
| TML | CHANNEL TUNNEL CONNECTION - JUNCTION TO MTCE. BOUN |
| TMP | Unknown - limited data available |
| TNC | TREETON NORTH JN - CATCLIFFE JN |
| TNW | THORNTON NORTH JN - THORNTON WEST JN |
| TOR | TORBAY BRANCH |
| TRL | Unknown - limited data available |
| TRL2 | Unknown - limited data available |
| TRL3 | Unknown - limited data available |
| TRL5 | Unknown - limited data available |
| TSB | TYSELEY SOUTH JN - BEARLEY JN |
| TSC | TIBSHELF + BLACKWELL BRCH JN - SILVERHILL COLLIERY |
| TSE1 | SOUTH TOTTENHAM EAST JN TO TOTTENHAM SOUTH JN |
| TSE2 | TOTTENHAM SOUTH JN TO TOTTENHAM WEST JN |
| TSJ | TWICKENHAM JN - SHACKLEGATE JN |
| TSN1 | TRENT SOUTH JN - MANSFIELD JN |
| TSN2 | NOTTINGHAM EAST JN - MANSFIELD JN |
| TSO | GEORGEMAS JN - THURSO STN |
| TSS | MUIRHOUSE CENTRAL JCN TO TERMINUS JCN |
| TTA1 | CHINLEY N JN - REDDISH JN (ROWSLEY-NEW MILLS/ROMILEY LINE) |
| TTA2 | REDDISH JN - ASHBURYS E JN (REDDISH BCH) |
| TTF | TOTTON - FAWLEY |
| TTH | TONBRIDGE EAST JN - HASTINGS |
| TUR | Unknown - limited data available |
| TWN | THORPE LE SOKEN - WALTON ON THE NAZE |
| TYB1 | CLARBOROUGH JN - COTTAM CEGB (TORKSEY BRANCH) |
| TYC | Unknown - limited data available |
| UCJ | CARLISLE UPPERBY BR JN - CALDEW JN (THROUGH GOODS |
| UDS | UP DECOY SIDINGS |
| UHL | WEMBLEY CNTL - WILLESDEN HL SDGS(UP HL ARRIVAL LINE) |
| ULR | CARLISLE UPPERBY JN - LONDON RD JN (THROUGH SDG) |
| UPG | UPMINSTER - GRAYS |
| VAT | Unknown - limited data available |
| VIR | VICTORIA(EASTERN LINES) - RAMSGATE (VIA HERNE HILL) |
| VOG | VALE OF GLAMORGAN LINE |
| VON | VALE OF NEATH LINE |
| VOT | VALE OF TOWY LINE |
| VTB1 | VICTORIA - WINDMILL BRIDGE JN (CROYDON) |
| VTB2 | WINDMILL BRIDGE JN - EARLSWOOD JN VIA QUARRY LINE |
| VTB3 | EARLSWOOD JN - BRIGHTON |
| VWC | Unknown - limited data available |
| VWW | WEYBRIDGE BAY PLATFORM - VIRGINIA WATER JN VIA ADDLESTONE |
| WAG1 | WAKEFIELD GOOLE (WAKEFIELD-ENGINE SHED JN) |
| WAG2 | WAKEFIELD GOOLE (ENGINE SHED JN - POTTERS GRANGE) |
| WAG3 | Unknown - limited data available |
| WAH | WORCESTER & HEREFORD LINE |
| WAJ | Unknown - limited data available |
| WAT | Unknown - limited data available |
| WAW | WILLESDEN LL GDS JN - ACTON WELLS JN |
| WBB | WYCOMBE BRANCH (PART CLOSED) |
| WBS1 | WINDSOR BRIDGE JN - CROW NEST JN (PENDLETON-HINDLEY LINE) |
| WBS2 | CROW NEST JN - WIGAN WALLGATE JN (LOSTOCK-PEMBERTON LINE) |
| WBS3 | WIGAN WALLGATE JN - SOUTHPORT (VIA MEOLS COP) |
| WCG | WATFORD HIGH ST - CROXLEY GREEN JN |
| WCI | WILTON ICI |
| WCK | INVERNESS STATION - WICK |
| WCL | WILLESDEN - WILLESDEN CARR SHED NTH (CARRIAGE LINE) |
| WCM1 | W.C.M.L.(CARLISLE - ELR CHANGE LAW JN) |
| WCM2 | W.C.M.L. (ELR CHANGE LAW JN - GLASGOW CENTRAL STAT) |
| WCS | SELHURST JN - GLOUCESTER ROAD JN |
| WDB1 | WREXHAM CENTRAL - HAWARDEN BRIDGE |
| WDB2 | DEE MARSH W JN - HAWARDEN BRIDGE (CHESTER-CONNAHS QUAY LINE) |
| WDB3 | BIDSTON DEE JN - DEE MARSH W JN (NORTH WALES-LIVERPOOL LINE) |
| WDJ | WALSALL (PLECK JN) - DARLASTON JN |
| WDN | Unknown - limited data available |
| WDS | Unknown - limited data available |
| WEB | WERRINGTON BRANCH |
| WEE | WINWICK JN - EARLESTOWN E JN (WALTON JN-EARLESTOWN LINE) |
| WEL1 | WEST EALING LOOP |
| WEL2 | Unknown - limited data available |
| WES | WESTBURY AVOIDING LINE |
| WEY | THINGLEY - DORCHESTER JN |
| WGL | BESCOT CVE JN - BESCOT JN (WEDNESBURY GOODS LINES) |
| WGP | WIGSTON SOUTH JN - GLEN PARVA JN |
| WHC1 | WHITLINGHAM TO CROMER (WHITLINGHAM JCN TO FORMER ROUGHTON RD JN LINE) |
| WHC2 | WHITLINGHAM - CROMER (FORMER ROUGHTON RD JN TO FORMER RUNTON E JN LINE) |
| WHC3 | WHITLINGHAM - CROMER (FORMER RUNTON E JN TO CROMER LINE) |
| WHL | CRAIGENDORAN JN - FORT WILLIAM STN |
| WHM | Unknown - limited data available |
| WHR | WHISKERHILL JNC RETFORD JNC |
| WIG | MARCH EAST JN TO WISBECH |
| WIN | WINDSOR BRANCH |
| WIS | WICKFORD SOUTHMINSTER |
| WJB | WILLINGDON JN - BOPEEP JN |
| WJK | KIRKBY - WALTON JN (PEMBERTON-LIVERPOOL LINE) |
| WJL1 | WEAVER JN - DITTON NO 1 JN (RUNCORN BCH) |
| WJL2 | DITTON NO 1 JN - SPEKE JN (TIMPERLEY-GARSTON LINE) |
| WJL3 | SPEKE JN - EDGE HILL JN (SPEKE-EDGE HILL LINE) |
| WJL4 | EDGE HILL JN - LIVERPOOL LIME STREET(L,POOL - MANC LINE) |
| WJP1 | GLAZEBROOK E JN - WOODLEY JN (GLAZEBROOK-GODLEY LINE) |
| WKC | Unknown - limited data available |
| WKL1 | WIGAN WALLGATE JN - PEMBERTON JN (LOSTOCK-PEMBERTON LINE) |
| WKL2 | PEMBERTON JN - KIRKBY (PEMBERTON-LIVERPOOL LINE) |
| WLL | FALCON JN (CLAPHAM CTL) - WILLESDEN W LONDON JN |
| WMB | WILLESDEN HL JN - MITRE BRIDGE JN |
| WME | WOODBURN JN - MEXBOROUGH EAST JN |
| WMJ | Unknown - limited data available |
| WMS | SITTINGBOURNE WESTERN JN - MIDDLE JN |
| WND | Unknown - limited data available |
| WNS | WIGSTON NTH JN - NUNEATON SOUTH JN |
| WOA1 | ARPLEY JN - WALTON OLD JN (WALTON/ARPLEY BCH) |
| WOP | WATER ORTON WEST JN - PARK LANE JN |
| WOW2 | Unknown - limited data available |
| WPH1 | WOKING JN - HAVANT JN |
| WPH2 | HAVANT JN - PORTSMOUTH HARBOUR |
| WPS | POULTON NO 3 - WYRE POWER STATION |
| WRO | Unknown - limited data available |
| WSA | WATFORD YARD GF - ST ALBANS ABBEY |
| WSB | WEST SLEEKBURN JN - NORTH BLYTH |
| WSJ1 | WOLVERHAMPTON N JN - STAFFORD RD JN |
| WSJ2 | STAFFORD RD JN - SALTNEY JN |
| WSM | WESTON SUPER MARE LOOP |
| WTB | Unknown - limited data available |
| WTH | TULSE HILL JN (NORWOOD LINE) - WEST NORWOOD JN |
| WTZ | Unknown - limited data available |
| WVL | WESTERN VALLEYS LINE |
| WWD | LAW JN - HOLYTOWN JN |
| WWK | WAKEFIELD KIRKGATE INGS JN WAKEFIELD WEST RIDING JN |
| WYE | WYE VALLEY BRANCH |
| WYL | WESTBURY EAST LOOP |
| WYM | WYMINGTON DEVIATION (SHARNBROOK - IRCHESTER) (SEE ALSO SPC2) |
| WYS | WEMYSS BAY JN - WEMYSS BAY STN |
| XTD | CHARING X - DOVER WESTERN DOCKS (VIA TONBRIDGE) |
| YAT | YATE BRANCH (YATE SOUTH JN - WESTERLEIGH JN) |
| YDS | ST CATHERINES JN - DECOY SOUTH JN |
| YJP | YEOVIL PEN MILL JUNCTION - YEOVIL JUNCTION |
| YKR | HYNDLAND EAST JN - DALMUIR PARK JN (VIA YOKER) |
| YMS | YORK - MALTON - SCARBOROUGH |
| YNL | Unknown - limited data available |
| YRC | Unknown - limited data available |
| YST | Unknown - limited data available |
| ZZE7 | Unknown - limited data available |
