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Engineer's Line References (ELRs)Last update 16 August 2018
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:
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 | Lines without codes | ELR/LOR converter | LUL system | DLR system | Canals
| ELR | Line name | Mileages | Datum | Notes |
|---|
| CAA | Canal Branch | 0.21 - 1.14 | Carlisle London Road Junction | |
| CAB | Coupar Angus to Blairgowrie Branch | 0.00 - 4.51 | Coupar Angus Junction | |
| CAC | Calderbank Colliery Branch | 0.00 - 1.30 | Calderbank Branch Junction | |
| CAD | Cadzow Branch | 0.00 - 1.40 | Cadzow Junction | Cadzow Junction on Hamilton to Motherwell line |
| CAE | Caelliau Branch | 14.50 - 16.15 | Swansea St Thomas Station | |
| CAG | Coventry Avoiding Line | 0.00 - 3.44 | Humber Road Junction | |
| CAH | Cart Harbour Branch | 6.36 - 6.72 | Bridge Street | |
| CAI | Calderbank Ironworks Branch | 0.00 - 0.47 | Calderbank Ironworks Box | |
| CAK | Calderbank Branch | ?? - ?? | Possibly Airdrie to Morningside line, datum Rutherglen East Junction | |
| CAL | Callington Branch | 0.02 - 9.50 | Bere Alston Junction | |
| CAM | Cardiff and Merthyr Line | 0.00 - 24.51 | Cardiff Bute Road | 24.19 - 24.51 formerly MER 5.70 - 6.22 |
| CAN | Carmarthen and Newcastle Emlyn Line | 245.10 - 270.67 | Paddington via Stroud | |
| CAO | Cawood Wistow and Selby Light Railway | 0.00 - 4.48 | Selby Junction | |
| CAP | Caerphilly and Pontypridd Line | 8.36 - 14.48 | Cardiff East Dock | |
| CAR | Cardiff and Rhymney Line | 0.00 - 24.00 | Cardiff East Dock | 23.66 - 24.00 formerly RRZ |
| CAS | Castella Branch (Old Glanmyshyd Branch) | ≈1.75 - ≈3.00 | Ely Valley Junction | Formerly CTZ |
| CAT | Catford Loop | 3.08 - 10.73 | Victoria | |
| CAW | Cricklewood to Acton Wells Line | 5.19 - 8.77 | St Pancras | |
| CAY | Camden Yard | 5.15 - 5.25 | Broad Street | |
| CAZ | Crockherbtown Carriage Sidings | 1.21 - ?? | Cardiff East Dock | Now in CHT |
| CBB | Cambusnethan Branch | 0.00 - 2.27 | Wishaw Central South Junction | |
| CBC | Carnforth Barrow and Carlisle Line | see separate portions | ||
| CBC1 | Carnforth North Junction to Whitehaven | 0.00 - 74.73 | Carnforth North Junction | |
| CBC2 | Whitehaven to Maryport Junction | 0.00 - 12.05 | Whitehaven | |
| CBC3 | Maryport to Carlisle | 0.00 - 27.58 | Maryport Junction | |
| CBD | Cumbernauld Line (Springburn to Garnqueen North Junction) | see separate portions | ||
| CBD1 | Gartcosh Junction to Garnqueen Junction | 0.00 - 1.33 | Gartcosh Junction | |
| CBD2 | Sighthill East Junction to Gartcosh Junction | 97.06 - 103.46 | Carlisle via Ravenscraig No 1 | |
| CBE | Cambridge Goods | 55.28 - 55.54 | Liverpool Street via Clapton | |
| CBH | Cransley Branch | 0.00 - 1.47 | Cransley Branch Junction | |
| CBI | Canal Tunnels | 0.00 - 0.53 | St Pancras Junction/Canal Tunnel Junction | |
| CBL | Camelon Branch | 19.47 - 22.07 | Glasgow Queen Street High Level | |
| CBM | Cannon Street to Borough Market Junction Line | 0.00 - 0.38 | Cannon Street | |
| CBN | Carbean Branch | 290.42 - 290.75 | Paddington via Box, Plymouth Millbay (reverse) and Carbean Junction (reverse) | |
| CBR | Castle Bromwich to Ryecroft (Walsall) Line | see separate portions | ||
| CBR1 | Castle Bromwich Junction to Park Lane Junction | 0.00 - 1.26 | Park Lane Junction | |
| CBR2 | Park Lane Junction to Ryecroft Junction | 36.04 - 47.54 | Derby via Whitacre Junction | |
| CBS | Carbis Branch | 287.43 - 289.13 | Paddington via Box, Plymouth Millbay (reverse) | |
| CBV | (Cardiff) Bute Viaduct Lines | 0.00 - 0.33 | Tyndall Street High Level Junction | |
| CBX | Carmyle and Bridgeton Cross Line | 97.32 - 100.33 | Carlisle | |
| CBY | Canning Town Blackwall Yards | 5.76 - 6.35 | Liverpool Street via Canning Town (reverse) | |
| CBZ | Clutton Branch | 0.00 - 0.63 | Clutton | |
| CCA | Cornbrook Junction to Castlefield Junction | 32.77 - 33.57 | Liverpool Central High Level | |
| CCB | Cotgrave Colliery Branch | see separate portions | ||
| CCB1 | Rectory Junction to Cotgrave Colliery | 0.00 - 1.63 + colliery | Cotgrave Colliery West Junction | |
| CCB2 | Cotgrave Colliery East Curve | 0.00 - 0.25 | Junction with Grantham to Nottingham line | |
| CCC | Cardiff Canton Carriage & DMU Depot | 170.60 - 171.27 | Paddington via Stroud | |
| CCD | Cardiff Canton Locomotive Depot | 170.60 - 171.21 | Paddington via Stroud | |
| CCE | Campbell Road Curve | 3.56 - 4.09 | Broad Street | Or to 4.12 |
| CCF | Cotcastle Fork (Stonehouse - Strathaven) | ?? - ?? | Track never laid | |
| CCG | Croxley Green Branch | see separate portions | ||
| CCG1 | Colne Junction to Croxley Green Junction | 16.39 - 16.58 | Euston | |
| CCG2 | Croxley Green Junction to Croxley Green | 16.58 - 18.09 | Euston | |
| CCH | Cambridge Coldham Lane Junction and Haughley Junction Line | 0.00 - 40.52 | Cambridge Coldham Lane Junction | |
| CCL | Castle Cary and Langport Line | 115.33 - 138.30 | Paddington via Newbury | |
| CCN | Clipstone Colliery Branch | 9.09 - 9.56 | Kirkby South Junction via Mansfield | |
| CCO | Camps Connecting Line | 0.00 - 0.13 | Exchange Junction | |
| CCQ | Chester and Connah's Quay Curve (Dee Marsh) | see separate portions | ||
| CCQ1 | Chester East Junction to Dee Marsh East Junction | 0.00 - 5.61 | Chester East Junction | |
| CCQ2 | Dee Marsh East Junction to Dee Marsh North Junction | 5.61 - 6.10 | Chester East Junction | |
| CCQ3 | Dee Marsh East Junction to Dee Marsh West Junction | 5.61 - 6.18 | Chester East Junction | |
| CCR | Conon to Cromarty Branch | n/a | n/a | Never built |
| CCS | Cardiff Canton - all other sidings not listed elsewhere | 0.19 - 0.66 | Cardiff Central | |
| CCS | Rock Ferry and Cathcart Street Goods Branch (Birkenhead Goods Extension Line) | see separate portions | ||
| CCS1 | Rock Ferry to Birkenhead Woodside | 13.30 - 15.14 | Chester | |
| CCS2 | Green Lane to Cavendish Sidings | 14.06 - 15.42 | Chester | |
| CCS3 | Green Lane Junction to Monks Ferry | 14.14 - 15.05 | Chester | |
| CCS4 | Green Lane Junction to Abbey Street | 14.36 - 14.56 | Chester | |
| CCT | Chorley and Cherry Tree Branch | 22.25 - 29.73 | Manchester Victoria | |
| CCV | Clifton Curve | 0.00 - ≈0.63 | Wetheriggs Junction | |
| CCY | Cadeby Colliery Branch | 0.00 - 0.22 | Branch Junction | |
| CCZ | Liskeard and Caradon Line | 7.29 - 20.75 | Looe Quay | |
| CDB | Craighead Branch | ?? - ?? | Craighead Colliery was served by North British and Caledonian Railways: not known to which this applies | |
| CDC | Perth to Ladybank Line | see separate portions | ||
| CDC1 | Ladybank to Bridge of Earn | 0.00 - 14.10 | Ladybank Junction | |
| CDC2 | Bridge of Earn to Hilton Junction | 44.18 - 45.66 | Edinburgh Waverley via Cowdenbeath New | |
| CDD | Chadderton Goods Branch | 5.35 - 6.25 | Manchester Victoria via Moston | |
| CDK | Cardiff Docks | see separate portions | ||
| CDK1 | Splott Junction to Roath Dock Road Level Crossing | 4.54 - 5.20 | Roath Branch Junction | |
| CDK2 | Splott Junction to Locks Road | 4.54 - 5.20 | Roath Branch Junction | |
| CDK3 | Compass Road to Longship Road | 5.20 - 6.26 | Roath Branch Junction | |
| CDK4 | Junction Lock Road to Frigate Road | 5.12 - 6.26 | Roath Branch Junction | |
| CDM | Deansgate (Manchester) and Dee Marsh (near Chester) Line | see separate portions | ||
| CDM1 | Castlefield Junction to Altrincham | 0.37 - 8.08 | Manchester Oxford Road | |
| CDM2 | Altrincham to Mickle Trafford | 7.69 - 35.41 | Manchester Central | |
| CDM3 | Mickle Trafford to Chester Northgate | 35.24 - 38.53 | Manchester Central | |
| CDN | Clevedon Branch | 0.00 - 3.45 | Yatton Station | |
| CDO | Chatham Dockyard Branch | Now CYD | ||
| CDS | Chesterford to Six Mile Bottom Branch | 0.00 - ≈9.21 | Chesterford Junction | |
| CDT | City and District Branch | 0.00 - 2.04 | Campbell Road Junction | |
| CDV | Cheadle Deviation Branch | 0.00 - 3.35 | Junction with original line CHE | |
| CDY | Chelmsford Freight Yard | 29.64 - 30.25 | Liverpool Street | |
| CDZ | Common Branch Loop Line | 0.00 - 0.40 | Llantrisant West Junction | |
| CEB | Cardiff East Branch | 0.00 - 0.66 | East Branch Junction | |
| CEC | Carnforth East Curve | 0.04 - 0.25 | Carnforth | |
| CED | Castle Eden Branch | ?? - ?? | ||
| CEF | Crofton East Fork | 0.00 - 0.38 | Crofton East Junction | |
| CEH | Castleton East Junction and Heywood Line | 0.00 - 0.37 | Castleton East Junction | |
| CEJ | Cardiff East Junction | 0.00 - 0.22 | Cardiff East Junction | Formerly 0.22 - 0.44 ex Riverside Junction |
| CEM | Clipstone East Junction to Mansfield Colliery Branch | 6.32 - 11.09 | Kirkby South Junction via Mansfield | |
| CEN | Camelon Branch | 0.00 - 1.16 | Camelon Junction | |
| CER | Colchester Goods | 50.72 - 51.49 | Liverpool Street | |
| CET | Castleford East Branch | 0.00 - 0.27 | Castleford East Junction | |
| CEZ | Cardiff East Branch | Now SWR | ||
| CFB | Cargo Fleet White House Branch | 0.00 - 1.00 | ||
| CFG | Coleford Branch | 0.00 - 5.20 | Wyesham Junction | Formerly 67.75 - 73.15 ex ?? Formerly COL |
| CFH | Church Fenton to Harrogate Line | see separate portions | ||
| CFH1 | Church Fenton to Crimple Junction | 0.00 - 16.42 | Church Fenton North Junction | |
| CFH2 | Crimple Junction to Harrogate | 16.42 - 18.37 | Church Fenton North Junction | Line re-miled at some stage and now LEH3 |
| CFJ | Coalfields Farm Colliery to Coalville Junction Branch | 0.00 - 0.62 | Coalville Junction | |
| CFL | Charnwood Forest Line | 0.00 - 10.30 | Charnwood Forest Junction | |
| CFM | Church Fenton and Micklefield Line | 10.31 - 15.62 | York | |
| CFN | Carfin Branch (Boiler Works - Newarthill Halt - Holytown & Cleland) | 0.00 - 0.35 | Carfin Colliery Box | Caledonian Railway branch to Carfin Colliery No 6 on Wishaw Extension Line |
| CFP | Canonbury to Finsbury Park Curve | 3.12 - 4.33 | Broad Street | |
| CFR | Cardiff Riverside Branch | 0.00 - 1.08 | Cardiff Riverside Branch Junction | Formerly CRS |
| CFS | Coleford Branch | 12.71 - 16.49 | Berkeley Road Junction via Coleford Branch Junction (reverse) | Formerly CSW |
| CFY | Connell Ferry to Ballachulish Line | ?? - ?? | ||
| CFZ | Cwmffrwd Branch | 12.67 - 14.07 | George Street Junction via Golynos Junction (reverse) | |
| CGB | Cockett Goods Branch | 216.74 - 217.38/ 0.00 - 0.44 |
Paddington via Stroud/Cockett Junction | |
| CGJ | Carlisle Grand Junction Line (WCML Crewe to Carlisle) | see separate portions | ||
| CGJ1 | Crewe to Weaver Junction | 159.00 - 176.00 | Euston | |
| CGJ2 | Weaver Junction to Warrington | 176.00 - 181.76 | Euston | |
| CGJ3 | Warrington to Winwick Junction | 181.76 - 185.49 | Euston | |
| CGJ4 | Winwick Junction to Golborne Junction | 185.49 - 187.76 | Euston | |
| CGJ5 | Golborne Junction to Preston | 0.53 - 21.57 | Newton-Le-Willows Junction | |
| CGJ6 | Preston to Lancaster | 0.00 - 20.78 | Preston | |
| CGJ7 | Lancaster to Carlisle | 0.00 - 69.09 | Lancaster | |
| CGL | Collyhurst Connection Line No 3 | 1.10 - 1.30 | Manchester Victoria | |
| CGS | Cartside Goods Line (Johnstone) | 0.00 - 0.29 | Cart Junction | |
| CGV | Corngreaves Branch | 0.00 - 0.60 | Cradley Junction | |
| CGW | Carlisle Gas Works Siding | 0.00 - 0.20 | Rome Street Junction | |
| CGZ | Cwmbargoed Branch | 17.32 - 19.60 | Abergavenny Junction | |
| CHA | Chapel Street Branch | ?? - ?? | Southport, or Chapel Street Mineral Siding at Greenock Central?? | |
| CHB | Chesterton Branch | 0.00 - 1.51 | junction with TLK | |
| CHC | Chapelhall Colliery Branch | 0.00 - 0.27 | Calderbank Station | Between Calderbank and Chapelhall on Caledonian Railway Airdrie to Morningside line |
| CHD | Chard Branch (GWR) | 0.00 - 13.08 | Creech Junction | |
| CHE | Cheadle to Cresswell Junction | 0.00 - 3.71 | Cresswell Junction | |
| CHE | Cheltenham Branch | 2.70 - 7.03 | Gloucester | 5.74 - 7.03 now CTM; 2.70 - 5.74 now 90.03 - 86.74 ex Derby in BAG2 |
| CHF | Coppermill Junction to Hall Farm Junction Line | 0.00 - 0.23 | Coppermill Junction | |
| CHH | Chickenley Heath Branch | 180.03 - 183.12 | Kings Cross | |
| CHI | Chilton Branch | ?? - ?? | ||
| CHI1 | Chilton Colliery Branch | ?? - ?? | ||
| CHJ | Carterhouse Junction to West Deviation Junction Line | 16.28 - 17.48 | Skelton Junction | |
| CHL | Cheltenham Loop/Gloucester Old Avoiding Line | 92.21 - 93.09 | Derby | |
| CHM | Channelsea North Junction to High Meads Junction | 0.00 - 0.15 | Channelsea North Junction | |
| CHN | Crockherbtown Loop | Now CHT | ||
| CHN | Castle Hills South Junction to West Junction Curve | 0.00 - 0.16 | Castle Hills South Junction | |
| CHP | Cromford and High Peak Line | see separate portions | ||
| CHP1 | No 1, Hindlow to Cromford | 4.70 - 24.06 | Buxton No 1 Junction | |
| CHP2 | No 2, Hindlow to Whaley Bridge | 0.00 - ≈10.36 | Hindlow | |
| CHQ | Huyton Quarry Junction to Cronton Colliery Branch | 0.00 - 0.76 | Huyton Quarry Junction | |
| CHR | Chesterfield and Rotherham Line | 146.59 - 162.24 | St Pancras via Leicester, Toton and Barrow Hill | |
| CHS | Crigglestone Junction and Horbury Junction Link Line | 0.00 - 1.53 | Horbury Junction | |
| CHT | Crockherbtown Loop | 1.15 - 1.34 | Cardiff East Dock | Formerly CHN |
| CHW | Chester and Warrington Line | see separate portions | ||
| CHW1 | Chester East Junction to Walton Old Junction | 0.27 - 17.23 | Chester | |
| CHW2 | Walton Old Junction to Warrington | 17.23 - 17.76 | Chester | |
| CHY | Cinder Hill Colliery Branch | 128.65 - 128.67 | St Pancras via Corby | |
| CHZ | Coalpit Heath Colliery Branch | 0.00 - 1.02 | Coalpit Heath Branch Junction | |
| CIB | Cinderford Branch | 5.05 - 8.05 | Forest of Dean Junction | Line to ≈9.60 never opened |
| CIL | Chester Independent Lines | 157.64 - 158.24 | Euston | |
| CIR | Cirencester Branch | 90.73 - 95.16 | Paddington | |
| CIW | Clyde Ironworks Branch | 0.00 - 0.13 | Clyde Junction | |
| CIZ | Caedu Incline | 5.18 - 5.66 | Tondu Middle Junction | Line re-miled: Datum = Copper Works Junction after 1950 |
| CJA | Copyhold Junction and Ardingly Line | see separate portions | ||
| CJA1 | Copyhold Junction to Haywards Heath | 36.34 - 37.00 | London Bridge via Redhill | |
| CJA2 | Copyhold to Ardingly | 0.00 - 1.14 | Copyhold Junction | |
| CJA3 | Ardingly to Horsted Keynes | 1.14 - 3.21 | Copyhold Junction | |
| CJB | Chard Junction Branch | 0.00 - 2.79 | Chard Junction | |
| CJC | Clapton Junction and Chingford Branch | 4.38 - 10.33 | Liverpool Street | |
| CJD | Challoch Junction to Dumfries Line | 0.00 - 66.29 | Dumfries | Or from 3.01 if does not include MAX |
| CJL | Clapham Junction to Latchmere No. 2 Junction Line | 0.37 - 0.68 | Kensington sidings buffer stops | |
| CJM | Camps Branch (LMS) | 0.00 - 1.28 | Camps Junction | |
| CJN | Camps Branch (LNE) | 0.00 - 3.51 | Camps Branch Junction | |
| CJS | Carcroft Junction to Stainforth Junction Line | 160.08 - 166.70 | King's Cross via Carcroft | |
| CKC | Cannock Chase Line | 0.00 - 5.42 | Hednesford | |
| CKL | Calvert Road Junction to Latchmere No. 1 Junction Line | 1.67 - 2.51 | Victoria | |
| CKN | Cleckheaton Branch | 0.00 - 8.48 | junction with MRB | |
| CKP | Cockermouth, Keswick and Penrith Line | 0.00 - 30.59 | Cockermouth junction with CWN | |
| CKS | Cricklewood Sidings | see separate portions | ||
| CKS1 | Cricklewood Sidings | 5.08 - 6.21 | St Pancras | |
| CKS2 | Cricklewood Sidings | 5.29 - 5.62 | St Pancras | |
| CKT | Craiglockhart Loop | 0.00 - 0.48 | Craiglockhart Junction | |
| CLA | Ashford Chart Leacon Depot | see separate portions | ||
| CLA1 | Not allocated | n/a | n/a | |
| CLA2 | Not allocated | n/a | n/a | |
| CLA3 | Not allocated | n/a | n/a | |
| CLA4 | Not allocated | n/a | n/a | |
| CLA5 | Not allocated | n/a | n/a | |
| CLA6 | Not allocated | n/a | n/a | |
| CLA7 | Not allocated | n/a | n/a | |
| CLA8 | Roads 1 to 9 | 54.72 - 55.68 | Charing Cross via Chelsfield | |
| CLA9 | Roads 10 to 18 | 54.76 - 55.21 | Charing Cross via Chelsfield | |
| CLB | Crianlarich Lower Branch | 29.27 - 30.23 | Callander | |
| CLC | Warrington Avoiding Line | 17.20 - 19.49 | Manchester Central | "Cheshire Lines Committee" |
| CLD | Caldon Low Branch | 0.00 - 0.51 | Caldon (or Cauldon) Junction | |
| CLE | Clee Hill Branch | 0.00 - 6.01 | Clee Hill Junction | |
| CLF | Clifton and Kearsley Branch (Dixon Fold to Kearsley) | 0.00 - 3.40 | Patricroft Junction | |
| CLH | Cliff House Branch | see separate portions | ||
| CLH1 | Main Branch | 0.00 - 1.06 | Cliff House Junction | |
| CLH2 | Scrap Yard Branch | 0.42 - 2.00 | Cliff House Junction via junction with CLH1 (reverse) | |
| CLI | Cleveland Steelworks Branch | 17.50 - 18.19 | Darlington | |
| CLJ | Clapham Junction Sidings | see separate portions | ||
| CLJ1 | Sidings 34 to 49 | 3.65 - 4.26 | Waterloo | = CLJ9?? |
| CLJ2 | Not allocated | n/a | n/a | |
| CLJ3 | Not allocated | n/a | n/a | |
| CLJ4 | Not allocated | n/a | n/a | |
| CLJ5 | Not allocated | n/a | n/a | |
| CLJ6 | Not allocated | n/a | n/a | |
| CLJ7 | Not allocated | n/a | n/a | |
| CLJ8 | Sidings 1 to 33 | 3.68 - 4.12 | Waterloo | |
| CLJ9 | Sidings 34 to 49 | 3.68 - 4.26 | Waterloo | |
| CLK | Carluke Branch | 0.00 - 2.67 | Castlehill Junction | North British Railway |
| CLL | Cardiff Leckwith Loop | 0.00 - 0.26 | Leckwith Junction North | |
| CLN | Chesterfield to Lincoln Line | see separate portions | ||
| CLN1 | Chesterfield to Shirebrook North | 0.00 - 10.19 | Chesterfield Market Place | |
| CLN2 | ?? | 5.00 - 7.00 ?? | Chesterfield Market Place | Covers footbridge no 36 on line to WH Davis siding |
| CLN3 | High Marnham Junction - Pyewipe Junction | 28.01 - 37.62 | Chesterfield Market Place | |
| CLO | Chesterfield Loop | 0.00 - 9.47 | Staveley Central | |
| CLP | Clarkston Loop | ?? - ?? | Clarkston East Junction on Caledonian Railway East Kilbride line to Clarkson West Junction on Cathcart to Neilston line, no regular traffic, lifted 1st world war | |
| CLS | Caernarvon to Llanberis Line | 0.00 - 9.00 | Caernarvon Junction | |
| CLU | Congleton Lower Junction to Congleton Upper Junction | 12.22 - 12.54 | original Stoke Junction | |
| CLV | Liverpool Central High Level Station to link with CLC Deviation | 0.00 - 0.28 | Liverpool Central High Level | |
| CLW | South Bank Junction to Clay Lane Works Branch | 17.15 - 17.52 | Darlington | |
| CLY | Clydesdale Line (Shields Junction to Larkfield Junction - Glasgow Central) | 100.60 - 102.18 | Carlisle | |
| CLZ | Clandown Branch | 10.17 - 10.61 | Bath Junction | |
| CMB | Cwmbran Branch/Llantarnam (or Passenger) Branch | 0.00 - 0.67 | Llantarnam Junction | |
| CMC | Cwmcarn Branch | 0.26 - 1.73 | Halls Road Junction | |
| CMD | Colwich Junction to Macclesfield Line | see separate portions | ||
| CMD1 | Macclesfield to Harecastle | 0.00 - 16.00 | Macclesfield Hibel Road | |
| CMD2 | Harecastle to Colwich | 15.65 - 38.61 | Macclesfield Hibel Road | |
| CMD3 | Harecastle Tunnel Line | 14.01 - 15.65 | Macclesfield Hibel Road | |
| CME | Campsie Branch | ?? - ?? | ||
| CMF | Cwmffrwdoer Branch | 10.39 - 11.65 | George Street Junction | |
| CMG | Cwmgorse Branch | 0.00 - 2.73 | Abernant Junction | Line onwards to Pontardawe never completed |
| CMH | Canons Marsh Branch | 0.00 - 1.07 | Ashton Swing Bridge Junction | Formerly BAS |
| CMI | Cleland and Morningside Branch | 1.72 - 7.03 | Mossend North Junction | |
| CMJ | West Croydon to Mitcham Junction Line | 3.08 - 6.12 | Wimbledon | |
| CML | Cambridge Fordham and Mildenhall Line | 1.46 - 20.62 | Cambridge | |
| CMM | Cwmmawr Branch/Burry Port & Gwendraeth Valley Branch | 0.00 - 12.52 | Burry Port Station | |
| CMN | Cwmnantddu Branch | 9.78 - 12.03 | George Street Junction | |
| CMO | Chester to Mold Line | 0.00 - 9.57 | Mold Junction | |
| CMP | Crewe and Manchester Piccadilly Line | see separate portions | ||
| CMP1 | Crewe North Junction to Edgeley Junction No 1 | 158.18 - 182.38 | Euston | |
| CMP2 | Edgeley Junction No 1 to Manchester Piccadilly | 182.38 - 188.70 | Euston | |
| CMR | Cymmer Junction Loop | Now CYM | ||
| CMR | Clifton Mill to Rugby Loop | 0.00 - 0.41 | Clifton Mill Junction | |
| CMS | Carmuirs South Curve | 0.00 - 0.40 | Carmuirs West Junction | |
| CMT | Cwmtillery Branch | 16.05 - 17.00 | Courtybella | |
| CMY | Clifton May Bank Branch | 142.57 - 143.21 | Paddington via Melksham | |
| CMZ | Camerton Branch | 0.00 - 11.32 | Limpley Stoke Junction | Formed from Camerton Branch (0.00 - 3.24 ex Camerton Branch Junction, now 8.08 - 11.32) and Limpley Stoke and Camerton Branch (0.00 - 8.08) |
| CNB | Chinley North Junction and Buxton Branch | see separate portions | ||
| CNB1 | Peak Forest Junction to Chinley North Junction | 161.05 - 168.39 | St Pancras | |
| CNB2 | Peak Forest Junction to Buxton Junction | 0.00 - 0.30 | Peak Forest Junction | |
| CNB3 | Millers Dale Junction to Buxton Curve Junction | 160.44 - 164.32 | St Pancras | |
| CNB4 | Buxton Curve Junction to Buxton Sidings | 164.32 - 164.73 | St Pancras | |
| CNB5 | Buxton Curve Junction to Buxton Midland Station | 164.32 - 164.55 | St Pancras | |
| CNC | Cathcart North Curve | 0.00 - 0.45 | Cathcart North Junction | |
| CND | Cardonald and Deanside Branch | see separate portions | ||
| CND1 | Cardonald Junction to Cardonald North Junction | 0.00 - 0.36 | Cardonald Junction | |
| CND2 | Cardonald North Junction to Deanside | 0.36 - 1.62 | Cardonald Junction | |
| CNE | Calne Branch | 0.00 - 5.25 | Calne Branch Junction | |
| CNG | Croes Newydd Junction and Gatewen Branch | 0.00 - 1.66 | Croes Newydd Junction | |
| CNH | Crewe North and Holyhead Line | see separate portions | ||
| CNH1 | Crewe North Junction to Chester East Junction | 158.18 - 178.67 | Euston | |
| CNH2 | Chester East Junction to Chester South Junction | 178.67 - 179.56 | Euston | |
| CNH3 | Chester South Junction to Holyhead | 179.56 - 264.43 | Euston | |
| CNH4 | Not allocated | n/a | n/a | |
| CNH5 | Not allocated | n/a | n/a | |
| CNH6 | Not allocated | n/a | n/a | |
| CNH7 | Not allocated | n/a | n/a | |
| CNH8 | Reserved for future Chester remodelling | 178.67 - 179.48 | Euston | |
| CNH9 | Reserved for future Chester remodelling | ?? - ?? | Euston | |
| CNL | Cornwall Loop | Now CNP | ||
| CNL | (Paisley) Canal Line | 1.06 - 9.11 | Port Eglinton Junction | |
| CNN | Coventry and Nuneaton Line | 0.00 - 9.53 | Coventry North Junction | |
| CNP | Cornwall Loop | 246.08 - 246.29 | Paddington via Box | Formerly CNL |
| CNS | Carpenters Road North Junction to South Junction | 0.70 - 1.12 | Victoria Park Junction | |
| CNT | Consett Branch | 0.00 - 13.57 | Ouston Junction | |
| CNV | Caernarvonshire Line | 0.00 - 18.40 | Caernavon Junction | |
| CNW | Carmarthen West Loop | 0.00 - 0.19 | Carmarthen Bridge Junction | |
| CNX | Clifton Extension Line | 2.03 - 9.29 | Bristol Temple Meads | Originally 0.00 - 3.56 from Narroways Hill Junction. 5.59 - 9.29 formerly HAA |
| CNZ | Coegnant Branch/Duffryn Branch | 9.16 - 9.63 | Bridgend | |
| COA | Coalport Branch | 0.00 - ≈8.02 | Hadley Junction | |
| COB | Cardiff and Ogmore Branch | 0.00 - 8.21 | Llanharan Junction | |
| COC | Colchester and Clacton Line | 51.65 - 69.56 | Liverpool Street | |
| COD | Corton Wood Colliery Branch | 0.00 - 2.50 | Elsecar Junction | |
| COE | Coxhoe Branch | 0.00 - 2.17 | Coxhoe Junction | |
| COG | College Goods Branch | 0.00 - 0.29 | High Street | |
| COH | Corkerhill (Wilsons) Branch | 0.00 - 0.06 | Corkerhill siding | Near Corkerhill shed |
| COI | Cowdenbeath Old to Invertiel Junction (Auchtertool Branch) | 0.00 - 7.26 | Invertiel Junction | Invertiel Junction to Fulford Junction |
| COJ | Cowdenbeath Old Branch | 21.37 - ?? | Edinburgh Waverley | Cowdenbeath South Junction to Lumphinnans Central Junction |
| COL | Coleford Branch (GW) | Now CFG | ||
| COL | Manchester and Ordsall Lane Junction Branch | 188.48 - 190.28 | Euston | |
| COM | Comedie Branch | ?? - ?? | ||
| CON | Clydeport Containerbase Terminal Branch | see separate portions | ||
| CON1 | Garvel Dock Junction to Containerbase Junction | 0.00 - 0.19 | Garvel Dock Junction | |
| CON2 | Cartsburn Junction to Garvel Dock Junction | 22.59 - 23.17 | Port Eglinton Junction | |
| CON3 | Cartsburn Junction to Clydeport | 22.59 - 24.42 | Port Eglinton Junction | |
| COR | Corkickle to Rowray Line | 0.00 - 6.77 - ?? | ||
| COR | Corris Railway | see separate portions | ||
| COR1 | Corris Railway (main route) | 0.00 - 8.43 | Machynlleth | |
| COR2 | Disused branch | 0.00 - 1.72 | Maespoeth Junction | |
| COS | Coltness Branch (Wishaw) | see separate portions | ||
| COS1 | Morningside Junction to Garriongill Junction | 14.15 - 15.29 | Polkemmet Junction | Originally Caledonian Railway, remiled continuation of North British Railway Morningside branch |
| COS2 | Morningside Junction to Coltness | 0.00 - 0.54 | Morningside Junction | See also MNG |
| COT | Cottam CEGB Branch | Now TYB1 | ||
| COU | Couston Branch | 0.00 - 0.74 | Couston Branch Junction | |
| COV | Colne Valley Branch | 50.28 - 69.28 | Liverpool Street via Marks Tey Junction (reverse) | |
| COW | Cowdenhill Branch | ?? - ?? | off Knightwood Branch; crosses Fulton St, Glasgow | |
| COY | Coley Branch | 0.00 - 1.61 | Coley Goods Junction | |
| COZ | Common Branch | 0.00 - 2.30 | Common Branch Junction | |
| CPB | Cameron Bridge to Pirnie Branch | 0.00 - 1.22 | Cameron Bridge | Served Leven Collieries Nos 1, 2, 3 & 4, Pirnie Colliery and Muiredge Colliery |
| CPC | Codnor Park Junction to Hammersmith (Midland Railway Centre) | 132.76 - 133.23 or 0.00 - 0.26 | St Pancras via Toton or Ironville Junction | Unclear which of two routes is intended |
| CPH | Craigentinny and Powderhall Branch | 0.00 - 1.78 | Powderhall Branch Junction | |
| CPI | Castleton and Bolton Line | see separate portions | ||
| CPI1 | Castleton South Junction to Castleton North Junction (Castleton South Fork Line) | 8.21 - 8.50 | Manchester Victoria | |
| CPI2 | Castleton North Junction to Bradley Fold Junction | 8.50 - 15.62 | Manchester Victoria | |
| CPI3 | Bradley Fold Junction to Bolton East Junction | 8.56 - 11.63 | Manchester Victoria via Besses o' th' Barn | |
| CPJ | Christ's Hospital to Peasmarsh Junction Line | 39.79 - 55.38/ 32.05 - 47.44 |
London Bridge via Redhill/Waterloo via Guildford | Line remiled after closure; formerly GCH |
| CPL | Penarth Curve | 0.00 - 0.25 | Penarth Curve South Junction | |
| CPM | Castleford and Pontefract Monkhill Line | see separate portions | ||
| CPM1 | Pontefract West Junction to former Cutsyke Junction | 56.42 - 59.03 | Manchester Victoria via Rochdale, Wakefield Kirkgate and Pontefract Monkhill (reverse) | |
| CPM2 | Former Cutsyke Junction to Castleford West Junction | 0.00 - 0.61 | Castleford West Junction | |
| CPP | Crystal Palace Loop | 0.66 - 1.10 | Paddington | |
| CPR | Collins Paper Mills Branch (Sunderland South Dock or Pallion) | ?? - ?? | ||
| CPS | Cottam Power Station Loop | 71.79 - 74.15 | Manchester London Road via Woodhead | |
| CPY | Caerphilly Branch | 5.03 - 8.72 | Bassaleg Junction | |
| CPZ | Caerphilly Branch Down Loop Line | ?? - 5.37 - 7.13 | Bassaleg Junction | |
| CQR | Cheetham Hill Junction and Queens Road Junction Curve | 0.73 - 1.21 | Manchester Victoria | |
| CQS | Cardiff Queen Street North Junction | 1.16 - 1.25 | Cardiff Bute Road | Now treated as part CAR |
| CR_1 | Nuneaton Cemetary Sidings | 96.41 - 96.62 | London Euston | |
| CR_2 | Nuneaton South Sidings | 96.63 - 97.00 | London Euston | |
| CR_3 | Nuneaton Up Side | 97.01 - 97.29 | London Euston | |
| CR_4 | Nuneaton Down Side | 97.09 - 97.35 | London Euston | |
| CR_5 | Hartshill (Engineer's) Siding | 99.30 - 99.54 | London Euston | |
| CR_6 | unknown | 106.15 - 106.35 | London Euston | |
| CR_7 | Tamworth Low Level Up Side | 110.05 - 110.23 | London Euston | |
| CR_8 | Lichfield Trent Valley | 116.31 - 116.48 | London Euston | |
| CR_9 | Rugeley | 124.24 - 124.46 | London Euston | |
| CR10 | Stafford S&T Siding | 132.70 - 132.75 | London Euston | |
| CR11 | Stafford Up Arrival | 133.08 - 133.25 | London Euston | |
| CR12 | Stafford Salop Siding | 133.05 - 133.28 | London Euston | |
| CR13 | Stafford OTM Depot | 133.23 - 133.32 | London Euston | |
| CR14 | Stafford Universal Grinding Co | 133.61 - 134.08 | London Euston | |
| CR15 | Coventry Station | 93.62 - 93.72 | London Euston | |
| CR16 | Coventry South | 8.13 - 8.38 | Milverton Junction | |
| CR17 | Coventry North | 0.02 - 0.32 | Coventry North Junction | |
| CR18 | Coventry North | 94.08 - 94.19 | London Euston | |
| CR19 | Coventry | 94.07 - 94.14 | London Euston | |
| CR20 | Stechford | -0.15 - -0.01 | Stechford North Junction | |
| CR21 | Grand Junction Up and Down Through Siding | 0.40 - 0.52 | ||
| CR22 | Soho Electric Traction Depot | 2.05 - 2.31 | Birmingham New St | |
| CR23 | Watery Lane | 7.78 - 8.10 | Birmingham New St | |
| CR24 | Wolverhampton | 12.69 - 13.00 | Birmingham New St | |
| CR25 | Wolverhampton Engineer's Siding | 12.61 - 12.68 | Birmingham New St | |
| CR26 | Wolverhampton Down Side | 12.79 - 13.07 | Birmingham New St | |
| CR27 | Wolverhampton Up Side | 13.08 - 13.25 | Birmingham New St | |
| CR28 | Oxley Down Side | 143.14 - 143.41 | London Paddington | |
| CR29 | Oxley Up Side | 143.15 - 143.47 | London Paddington | |
| CR30 | Oxley Carriage Washing Siding | 143.36 - 143.62 | London Paddington | |
| CR31 | Basford Hall Down Sidings | 156.68 - 157.23 | London Euston | |
| CR32 | Basford Hall Up Sidings | 156.74 - 157.22 | London Euston | |
| CR33 | Basford Hall Coal Sidings | 157.22 - 157.39 | London Euston | |
| CR34 | Basford Hall South Yard | 157.26 - 157.47 | London Euston | |
| CR35 | Salop Goods Sidings | 157.26 - 157.51 | London Euston | |
| CR36 | Crewe Wagon Shop | 0.37 - 0.58 | Crewe South Junction | |
| CR37 | Crewe Brook Carriage Siding | 157.03 - 157.20 | London Euston | |
| CR38 | Crewe Brook Carriage Siding | 157.20 - 157.24 | London Euston | |
| CR39 | Crewe Down Holding Siding | 157.43 - 157.73 | London Euston | |
| CR40 | Gresty Road Sidings | 0.01 - 0.30 | Gresty Lane Junction | |
| CR41 | Gresty Up Sidings | 0.62 - 1.12 | Crewe South Junction | |
| CR42 | Gresty Down Sidings | 0.60 - 1.11 | Crewe South Junction | |
| CR43 | Hartford | 170.48 - 170.77 | London Euston | |
| CR44 | Chatterley Valley Disposal | 16.02 - 16.23 | Macclesfield Hibel Road | |
| CR45 | Longport Up Siding | 16.43 - 17.05 | Macclesfield Hibel Road | |
| CR46 | Longport Down Siding | 16.57 - 17.07 | Macclesfield Hibel Road | |
| CR47 | Basford Hall Down Sidings | 156.69 - 157.21 | London Euston | |
| CR48 | Cockshute Siding | 19.20 - 19.42 | Macclesfield Hibel Road | |
| CR49 | Stoke LNW Yard | 19.48 - 19.62 | Macclesfield Hibel Road | |
| CR50 | Stoke Freight Terminal | 19.17 - 19.60 | Macclesfield Hibel Road | |
| CR51 | Stoke Station Siding | 19.18 - 19.71 | Macclesfield Hibel Road | |
| CR52 | Marcroft Wagon Repair Siding | 21.01 - 21.43 | Macclesfield Hibel Road | |
| CR53 | Leek Brook Junction Siding | 0.01 - 0.27 | Leek Brook Junction | |
| CR54 | Oakamoor British Industrial Sand | 10.21 - 10.40 | Uttoxeter | |
| CR55 | Oxley Down Side | 143.18 - 143.39 | London Paddington | |
| CRA | Crayford: Spur A to Spur B Junctions | 16.11 - 16.41 | Charing Cross via Sidcup | |
| CRB | Cowbridge Road Junction to Bridgend | 18.35 - 18.76 | Barry Junction | Treated as part VOG |
| CRB | Moor Row to Cleator Moor | 2.24 - 3.38 | Mire House Junction | |
| CRC | Camden Road Junction to Camden Junction Line | see separate portions | ||
| CRC1 | Camden Road Junction to Camden Road Viaduct | 5.10 - 5.23 | Broad Street | |
| CRC2 | Camden Road Viaduct to Camden Junction | 5.23 - 5.78 | Broad Street | |
| CRD | Boundary with Talbot to St James Junction | 113.49 - 114.40 | ||
| CRE | Capeldrae (Westfield) to Redford Junction Branch (Thornton) | 27.78 - 33.04 | Stirling | |
| CRF | Camden Road to Finsbury Park Curve (including King's Cross Goods) | see separate portions | ||
| CRF1 | Freight Terminal Junction to mileage change (King's Cross Incline) | 0.00 - 0.30 | Copenhagen Junction (formerly known as Freight Terminal Junction) | Now NLI |
| CRF2 | Mileage change to Camden Road Central Junction | 4.45 - 4.64 | Broad Street | |
| CRF3 | King's Cross Yard | 0.06 - 0.34 | Freight Terminal Junction | |
| CRG | Commercial Road Goods Depot | 0.00 - 0.27 | Commercial Road Junction | |
| CRH | Cromer High Branch | 23.29 - 24.03 | Norwich | |
| CRI | Criggion Branch | 0.00 - 5.27 | Kinnerley | |
| CRL | Clarbeston Road and Letterston Line | 271.08 - 281.57 | Paddington via Stroud | |
| CRN | Charlestown Branch | 0.00 - 2.13 | Elbowend Junction | |
| CRO | Crossfields Branch | 2.24 - 3.38 | Mire House Junction | |
| CRP | Corstorphine Branch | 2.22 - 3.57 | Haymarket West Junction | |
| CRR | Chester and Rock Ferry Line | see separate portions | ||
| CRR1 | Chester West Junction to Hooton Junction | 0.19 - 7.70 | Chester | |
| CRR2 | Hooton Junction to Rock Ferry Station | 7.70 - 13.39 | Chester | |
| CRS | Cardiff Riverside Branch | Now CFR | ||
| CRS | Cromer and Sheringham Branch | 42.71 - 45.64 | South Lynn Junction | |
| CRT | Coursington Branch | ?? - ?? | ||
| CRY | Cardiff Railway | 0.00 - 9.28 | Heath Junction | 5.24 - 7.18 now in NAN |
| CRZ | Cawdor Branch | 14.73 - ≈16.13 | Llandilo Junction | |
| CSB | Crowhurst Sidley and Bexhill West Line | 57.59 - 62.15 | Charing Cross via Chelsfield | |
| CSC | Cable Street Coal Depot (London Commercial Road) | ?? - ?? | No apparent mileage, siding on up side of GER between Shadwell and Leman Street | |
| CSD | Castleton Depot | 7.72 - 8.64 | Manchester Victoria | |
| CSF | Croes Newydd South Fork (Wrexham South Curve) | 201.21 - 201.37 | Paddington via Didcot | |
| CSG | Crewe Salop Goods Loop | 156.26 - 157.55 | Euston | |
| CSJ | Clifton South Curve (Clifton to Nanny Goat Junction) | ?? - ?? | Links CGJ7 to EDE, approx 0.74 long | |
| CSM | Chislehurst to St Mary Cray Line | see separate portions | ||
| CSM1 | Chislehurst Junction to St Mary Cray Junction | 11.33 - 11.71 | Charing Cross | |
| CSM2 | Chislehurst Junction to Hawkwood Junction | 11.33 - 11.66 | Charing Cross | |
| CSM3 | Hawkwood Junction to St Mary Cray Junction | 11.69 - 12.30 | Charing Cross | |
| CSN | Cowlairs North Junction to East Junction Curve | 0.00 - 0.21 | Cowlairs East Junction | |
| CSP | Carstairs Curve | 73.49 - 74.10 | Carlisle via Carstairs (reverse) | |
| CSQ | Calstock Quay Branch | 0.00 - 1.25 | Branch junction | Sometimes SCQ used in error |
| CSS | Stonefield to Splott Junction (Cannon Street Goods) | 0.00 - 0.65 | Splott Junction | |
| CST | Carpenters Road North Junction to Stratford Central Junction West | 0.00 - 0.29 | Stratford Central Junction | |
| CSW | Coleford Branch (S&W) | Now CFS | ||
| CSW | Metropolitan Junction to Cannon Street South Junction | 1.35 - 1.49 | Charing Cross | |
| CSY | Chichester to Selsey Branch | 0.00 - 7.40 | Chichester | |
| CTA | Clifton Junction to Accrington Line | see separate portions | ||
| CTA1 | Clifton Junction to Radcliffe North Junction | 4.51 - 8.60 | Manchester Victoria | |
| CTA2 | Bury Loco Junction to Accrington North Junction | 8.63 - 22.02 | Manchester Victoria via Cheetham Hill Junction | |
| CTB | Colton Branch (Dunfermline) | 0.00 - 0.28 | Whitemyre Junction | |
| CTC | Cathcart Circle | 0.00 - 5.19 | Muirhouse North Junction | |
| CTD | Cadoxton and Trehafod Line | 0.00 - 16.53 | Cadoxton Junction | Formerly CTL |
| CTH | Colne Junction to Hythe Junction Curve | 0.00 - 0.22 | Colne Junction | |
| CTL | Cadoxton and Trehafod Line | Now CTD | ||
| CTL | Calder Bridge Junction to Turners Lane Junction Curve | 0.00 - 0.50 | Calder Bridge Junction | |
| CTM | Cheltenham Branch | 2.70 - 7.03 | Gloucester | Formerly CHE. 2.70 - 5.71 now 90.23 - 86.71 ex Derby in BAG2 |
| CTP | Connington South Tip Sidings | 66.61 - 67.55 | King's Cross | |
| CTR | Catrine Branch | 0.00 - 1.34 | Brackenhill Junction | |
| CTS | Coltness Branch | 0.00 - 0.67 | Morningside | North British Railway branch to Coltness Ironworks |
| CTY | City Link Line (Springburn to Pinkston Junction) | 0.00 - 0.30 | Cowlairs South Junction | Now PNS or ZZB5?? |
| CUL | Culm Valley Branch | 0.01 - 7.29 | Culm Valley Branch Junction | |
| CUS | Cudworth Station Branch | 52.71 - 53.63 | Hull Alexandra Dock | |
| CUZ | Cwmcapel Branch | 0.00 - 1.11 | Burry Port Docks | |
| CVA | Calva to Buckhill | 0.00 - 6.30 | Calva Junction | Formerly SBL2 |
| CVB | Cheddar Valley Branch | 14.02 - 31.57 | Witham East Somerset Junction | |
| CVL | Churnet Valley Line | 0.00 - 27.28 | Uttoxeter East Junction | |
| CVR | Cairn Valley Light Railway | 0.00 - 15.51 | Moniaive | |
| CVS | Chester South Junction to Chester North (or West) Junction | 0.00 - 0.24 | Chester West Junction | |
| CVZ | Carnarvon/Carnarfon Branch | 0.44 - 1.08 | Llandilo Junction | |
| CWB | Messers Cook and Co Works Branch | 2.55 - 2.64 | Treeton Junction | Cook's Tinsley Works at West Tinsley on Sheffield District line |
| CWD | Crewe Works Deviation | 157.79 - 158.01 | Euston | |
| CWE | Clayton West Branch | 7.67 - 11.22 | Huddersfield | |
| CWH | Cowdenbeath Branch | see separate portions | ||
| CWH1 | Inverkeithing to Cowdenbeath | 13.21 - 22.76 | Edinburgh Waverley | |
| CWH2 | Cowdenbeath to Lumphinnans | 0.00 - 0.70 | Cowdenbeath North Junction | |
| CWH3 | Lumphinnans to Thornton South Junction | 27.00 - 35.38 | Edinburgh Waverley | |
| CWJ | Camden to Watford Junction Line (DC Electric Lines) | 1.36 - 17.58 | Euston | |
| CWK | Hamilton Square and West Kirby Line | see separate portions | ||
| CWK1 | Hamilton Square to Mersey Tunnel | 1.60 - 3.00 | Liverpool Central Low Level | |
| CWK2 | Mersey Tunnel to Bidston | 3.00 - 4.40 | Liverpool Central Low Level | |
| CWK3 | Bidston to West Kirby | 4.40 - 10.46 | Liverpool Central Low Level | |
| CWL | Central Wales Line | see separate portions | ||
| CWL1 | Junction with SHL to original zero point | 20.01 - 20.12 | Shrewsbury | |
| CWL2 | Original zero point to Llandovery | 0.00 - 59.14 | Central Wales Junction | |
| CWM | Coopers Lodge Junction to Wimblebury Mine | ?? - ?? | ||
| CWN | Cockermouth and Workington Line | 0.00 - 8.12 | Cockermouth Goods station | |
| CWO | Cleator and Workington Line | 0.00 - 10.06 | Cleator Moor Junction | |
| CWP | Camden Washing Plant | ≈1.03 - 1.36 | Euston | |
| CWR | Cattewater Branch | 0.43 - 1.64 | Turnchapel Branch Junction | |
| CWS | Clipstone West Junction to South Junction Curve | 10.66 - 11.04 | Kirkby South Junction via Mansfield | |
| CWT | Caerwent Branch | 0.00 - 3.29 | Caerwent Branch Junction | |
| CWZ | Cwmbach Branch | 22.00 - 22.52 | Cardiff Bute Road | Part now ALK |
| CXL | Caldercruix Lower Branch | 0.00 - 0.41 | Caldercruix West signal box | Caldercruix Paper Mills branch |
| CYA | Cylla Branch | 13.72 - 15.08 | Cardiff East Dock | |
| CYC | Chinley Chord | 167.55 - 168.32 | St Pancras | |
| CYD | Chatham Dockyard Branch | 0.00 - 2.43 | Gillingham Junction | Formerly CDO |
| CYL | Crimea Yard Branch | 0.71 - 1.38 | Paddington | |
| CYM | Cymmer Junction Loop | 11.11 - 11.32 | Bridgend | Formerly CMR |
| CYW | Canterbury and Whitstable Line | 70.34 - 76.41 | Charing Cross via Chelsfield | |
| CYY | Scarborough Goods Lines | 0.00 - 0.38 | York Yard South Junction | Also known as Clifton York Yard, or as York Turning Triangle |
| CYZ | Clydach Loop | 0.00 - 0.46 | Felin Fran West Junction | Not completed |