Last update 3 December 2021 2021
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This is, as far as is known, a full list of post-1973 codes used to identify train maintenance depots. Depot codes were applied as stickers to rolling stock, usually (but not always) underneath the data panel; an example on a class 73 is shown below; the observant will note that these form the inspiration for this site's logo.
Some codes changed over the years and some were reused, so there are depots and codes listed more than once. Where known, when each code was used is shown, together with whether a depot is still in use (with operator) or has closed. For NLC, TIPLOC and Stanox codes for depots, the reader is referred to this page. CRS codes, where allocated, are shown here.
Several codes on this list do not appear on other equivalent lists. They mostly represent stations at which basic maintenance could take place by mobile fitter (e.g. PD, Paddington). These were derived from this British Rail Business Systems pocket guide 2.2Mb file starting on page 8. Such codes existed even if not used on trains or the 'depot' didn't have an allocation. Further through you can enjoy various codes including repair and faults, train heat and, at the very back, liveries. Note that pages 17, 20, 34-36 and back cover had no content and are not included here. There are a couple of known transcribing errors: depot HG is shown as Hastings (should be Hither Green) and depot PO is shown as 07627 (should be 07267).
Codes with comments in bold red type are believed to be correct, but require confirmation from a separate source to verify.
| Code | Depot name | CRS code | Operator | Notes |
|---|
| AB | Aberdeen Ferryhill | Closed 1987 | ||
| AB | Aberdeen Guild Street | DB Cargo | ||
| AC | Whatley (ARC) | Became WH from 1994 | ||
| AC | Aberdeen Clayhills | XAC | London North Eastern Railway | |
| AD | Ashford (Kent) | Hitachi Rail Europe | ||
| AF | Ashford Chart Leacon (Kent) | XEV | Bombardier | |
| AF | Ashford Station (Kent) | AFK | Closed (2005?) | |
| AH | Ashchurch | Ministry of Defence | ||
| AH | Asfordby Technical Centre | Alstom | ||
| AK | Manchester Ardwick | XRK | Siemens to 14 September 2021 Siemens Mobility from 15 September 2021 | |
| AL | Aylesbury | Chiltern Railways | Replaced Marylebone (ME) | |
| AN | Allerton (Liverpool) | XAL | Arriva Rail North | Perviously used by Network Rail |
| AO | Acton | DB Cargo | ||
| AP | Ashford Rail Plant | Balfour Beatty | Should be AZ? | |
| AT | Alstom | Alstom | General code, not for a specific site | |
| AV | Vasteras Sweden | Bombardier | ||
| AV | Avonmouth Bulk Handling Terminal | Freightliner | ||
| AW | Ardwick West | Network Rail | ||
| AY | Ayr | XAY | DB Cargo | |
| AZ | Ashford (Kent) | Balfour Beatty | ||
| AZ | Alizay (France) | Axiom Rail | ||
| BA | Barry | Closed (2005?) | ||
| BA | Basford Hall Yard (Crewe) | Freightliner | ||
| BB | Beechbrook Farm | EWS | ||
| BB | Billingham | SemCorp Utilities | ||
| BB | Boulby | Freightliner | ||
| BC | Bescot Yard | XBY | DB Cargo | |
| BC | Birkenhead Mollington Street | Closed 1985 | ||
| BC | Birkenhead North CS | General storage | ||
| BC | Birch Coppice | Freightliner | ||
| BC | Bicester | Ministry Of Defence | ||
| BC | Beechbrook Farm | Freightliner | Closed | |
| BC | Boden Rail | Boden Rail | ||
| BD | Birkenhead North | XDB | Merseyrail | Formerly BN |
| BE | Barnetby East | Freightliner | ||
| BE | Bristol East Depot | DB Cargo | ||
| BE | Bedford Midland | Govia Thameslink Railway (Thameslink) | ||
| BF | Beechbrook Farm | Closed | ||
| BF | Bedford Cauldwell | Govia Thameslink Railway (Thameslink) (formerly Southern for First Capital Connect) | Class 319s carried BF1 stickers: the '1' may be for 'First' | |
| BG | Hull Botanic Gardens Diesel Multiple Unit Depot | XBG | Arriva Rail North | |
| BG | Billingham | |||
| BH | Barrow Hill | Barrow Hill Roundhouse | Closed 1991; reopened by roundhouse trust | |
| BI | Brighton Lovers Walk | XBI XDV | Govia Thameslink Railway (Southern) | |
| BJ | Bristol Marsh Junction | Closed | ||
| BK | Birkenhead Central | Closed by 2003 | ||
| BK | Bristol Barton Hill | XHL | London And North Western Railway Company | |
| BL | Crewe Basford Hall | Freightliner | ||
| BL | Blyth Cambois | Closed 17 September 1994 | ||
| BL | Battlefield Line (Shackerstone) | Battlefield Line | ||
| BM | Bournemouth | XBM | South Western Railway | |
| BN | Bounds Green | XGD | London North Eastern Railway to 10 November 2018 Hitachi Rail Europe from 11 November 2018 | |
| BN | Birkenhead North | Became BD from December 1976 | ||
| BO | Bedford Cauldwell | See BF | ||
| BO | Burton-on-Trent | Nemesis Rail | ||
| BO | Bo'ness | Scottish Railway Preservation Society | Believed superseded BT | |
| BP | Beattock | Closed | Code only used to December 1976 | |
| BP | Blackpool North Carriage Sidings | XNS | Arriva Rail North | Previously used by Network Rail |
| BQ | Bury | East Lancashire Railway | Formerly BV | |
| BQ | Bardon Hill Quarry | Freightliner | ||
| BR | Bristol Bath Road Traction Maintenance Depot | XAB | Closed 28 August 1995 regulatory approval 27 October 1998 | |
| BR | Bristol Kingsland Road | Network Rail | ||
| BR | Banbury | Chiltern Railways | ||
| BS | Bescot | DB Cargo | ||
| BT | Bo'ness | Scottish Railway Preservation Society | Believed superseded by BO | |
| BU | Burton-on-Trent | Nemesis Rail | Closed; reopened by Nemesis | |
| BU | Burngullow | Freightliner | ||
| BV | Bury | Became BQ from January 1975 | ||
| BV | Beever | Training location | ||
| BV | Swansea Burrows Sidings | |||
| BW | Barry Wagon Repair Depot | Network Rail | ||
| BW | Barrow-in-Furness | XBF | Arriva Rail North | |
| BX | Buxton | Closed 12 October 1997 (replaced by Peak Forest: no code?) | ||
| BY | Bletchley | XBQ | West Midlands Trains (London Northwestern Railway) | |
| BZ | St Blazey (Par) | DB Cargo | ||
| CA | Cambridge Coldhams Lane | XCA | Axiom Rail | |
| CA | Carlisle | DB Cargo | ||
| CB | Crewe Brook Sidings | DB Cargo | ||
| CB | Crewe Basford Hall | Freightliner | ||
| CB | Codnor Park | Midland Heritage Trust | ||
| CC | Cambridge Coalfield Sidings | Network Rail | ||
| CC | Clacton | Greater Anglia | Formerly CL | |
| CD | Crewe Diesel | Locomotive Storage | Formerly CE | |
| CD | Cricklewood East | Became CW from December 1973 | ||
| CE | Crewe International Electric | DB Cargo | Formerly CW | |
| CE | Crewe Diesel | Became CD from December 1973 | ||
| CF | Cardiff Canton | XPC | Transport for Wales Pullman Rail | |
| CG | Crewe Gresty Lane | Network Rail | ||
| CG | Crewe Gresty Bridge | Direct Rail Services | ||
| CG | Croxley Green | Closed | ||
| CH | Chester | XCH | Alstom | |
| CJ | Chirk Kronospan | Colas Rail | ||
| CJ | Clapham Junction | XCP | South Western Railway | |
| CK | Corkerhill | XCK | Scotrail | |
| CL | Glasgow Cowlairs | Became GC from October 1983 | ||
| CL | Clacton | Became CC from December 1976 | ||
| CL | Carlisle Upperby | XUM | Closed | |
| CL | Crewe LNWR | LNWR | ||
| CM | Camden Carriage Sidings | XCM | West Midlands Trains (London Northwestern Railway) | |
| CN | Carnforth | DB Cargo | ||
| CN | Camden Sidings | |||
| CN | Chaddesden | Freightliner | ||
| CO | Cranmore | East Somerset Railway | ||
| CO | Coquelles (France) | Eurotunnel | ||
| CP | Crewe Carriage Sidings | XCR | London And North Western Railway Company | |
| CQ | Crewe | Railway Age | ||
| CR | Colchester | Greater Anglia | ||
| CR | Crewe Gresty Bridge | Direct Rail Services | ||
| CS | Carnforth | West Coast Railway Co | Closed 1968; reopened by heritage society | |
| CS | Cannon Street | Closed | ||
| CT | Chester Carriage & Wagon Maintenance Depot | Closed 1998 | ||
| CT | Cleethorpes | Siemens to 14 September 2021 Siemens Mobility from 15 September 2021 | ||
| CT | Cheriton | Eurotunnel | ||
| CU | Carlisle Currock | |||
| CU | Coatbridge Freightliner Terminal | Freightliner | ||
| CV | Cardiff Canton Sprinter Depot | XCC | 'Paper' code only. See CF | |
| CV | Coalville Mantle Lane | Code used from mid-'80s; closed October 1994 | ||
| CW | Cricklewood East | XCD | East Midlands Trains | Formerly CD |
| CW | Crewe Electric/Crewe International | Became CE from December 1973 | ||
| CX | Crofton | XRF | Bombardier | See also XW |
| CX | Chalmerston | Freightliner | ||
| CY | Crewe Coal/South Yard | XCT | Direct Rail Services | |
| CY | Clapham Junction Yard | XCP | General storage | |
| CY | Cardiff Cathays | Closed | ||
| CZ | Barton Under Needwood Carriage Maintenance Depot (Central Rivers) | XUN | Bombardier | |
| DA | Sheffield (Darnall) | Closed 1987, replaced by Sheffield (SM) | ||
| DC | Hull Dairycoates | Closed | ||
| DD | Doncaster Wood Yard | DB Cargo | ||
| DE | Dundee West | DUE | DB Cargo | |
| DF | Derby RTC | Loram | ||
| DI | Didcot Railway Centre | Great Western Society | ||
| DL | Doncaster Works | Wabtec/Freightliner Heavy Haul | ||
| DL | Dollands Moor | DB Cargo | ||
| DM | Dollands Moor | DB Cargo | ||
| DM | Dagenham | Freightliner | ||
| DM | Dee Marsh | |||
| DN | Darlington | Closed | ||
| DO | Darnall | Closed | ||
| DP | Devonport | Devonport Management | ||
| DR | Doncaster Carr | DB Cargo | ||
| DT | Dunfermline Townhill | Closed | ||
| DT | Didcot Triangle | DB Cargo | ||
| DU | Doncaster Up Decoy LMD | DB Cargo | ||
| DU | Duddesdon | Closed | ||
| DV | Dover | Southeastern Trains | ||
| DV | Daventry | Direct Rail Services | ||
| DW | Doncaster West Yard | XWV | Network Rail | |
| DY | Derby Etches Park | XEP | East Midlands Railway | |
| EA | Eastleigh Airport Siding | DB Cargo | ||
| EA | East Anglian Railway Museum (Chappel & Wakes Colne) | East Anglian Railway Museum | ||
| EC | Edinburgh Craigentinny | XCN | London North Eastern Railway to 10 November 2018 Hitachi Rail Europe from 11 November 2018 | |
| ED | Glasgow Eastfield | XED | Scotrail | Closed 1992; rebuilt 2004 |
| EE | Exeter St Davids Carriage Sidings Fuelling Point | Great Western Railway | ||
| EG | Liverpool Edge Hill | XEG | Closed | |
| EH | Eastleigh | XEH | DB Cargo | |
| EI | Edinburgh Craigentinny Carriage Sidings | London North Eastern Railway to 10 November 2018 Hitachi Rail Europe from 11 November 2018 | ||
| EJ | Ebbw Junction | Closed | ||
| EJ | Leith South | Freightliner | ||
| EL | Heywood | East Lancashire Railway | ||
| EM | East Ham | XEM | c2c | |
| EN | Euston Downside | XEN | Closed | |
| EP | Edinburgh Portobello | Merged with Craigentinny (EC) early 1990s | ||
| EP | Ely | Potter Group | ||
| ER | Eurre (France) | SNCF | ||
| ES | Embsay | Embsay Steam Railway | ||
| ES | Earles Sidings | Freightliner | ||
| ET | Eastleigh | Freightliner | ||
| ET | Coquelles (France) | Eurotunnel | ||
| EU | East Usk Junction New Sidings | DB Cargo | ||
| EU | Euston Station | DB Cargo | ||
| EX | Overseas Sites | |||
| EX | Exeter St Davids Servicing Depot | XXF | Great Western Railway | |
| FA | Fairwater | Freightliner | ||
| FB | Ferrybridge | DB Cargo | ||
| FD | Freightliner Diesels (general code) | Freightliner | ||
| FE | Freightliner Electrics (general code) | Freightliner | ||
| FF | Forest (Brussels) | SNCB/NMBS | ||
| FH | Frodingham | Grant Rail | Closed April 1993; reopened | |
| FK | Ferme Park | Became FP, date unknown | ||
| FK | Falkirk | Scottish Railway Preservation Society | ||
| FM | Fraser | Training location | ||
| FN | Felixstowe North Docks | GB Railfreight | ||
| FP | Ferme Park | XFD | London North Eastern Railway to 10 November 2018 Hitachi Rail Europe from 11 November 2018/GB Railfreight | Formerly FK |
| FP | Finsbury Park | Closed | ||
| FR | Fratton | XFR | South Western Railway | |
| FS | Freightliner Shunters (general code) | Freightliner | ||
| FT | Frethun (France) | SNCF | ||
| FW | Fort William | DB Cargo | ||
| FX | Felixstowe | Felixstowe Dock & Railway Co | ||
| FY | Merehead (Foster Yeoman) | Foster Yeoman | Became MD from 1994 | |
| FZ | Fort William Yard | DB Cargo | ||
| GB | Guide Bridge | Freightliner | ||
| GC | Glasgow Cowlairs | Closed. Formerly CL | ||
| GD | Gateshead | Closed | ||
| GF | South Gosforth | Nexus | ||
| GI | Gillingham (Kent) | XGI | Southeastern Trains | |
| GL | Gloucester | Colas Rail | Previously used by Cotswold Rail | |
| GM | Grangemouth | Direct Rail Services | ||
| GN | Garston Freightliner Terminal | Freightliner | ||
| GO | Waterston (Gulf Oil) | Closed | ||
| GO | Goole | Closed | ||
| GP | Grove Park | South Eastern Trains | ||
| GS | Glasgow Shields | Became GW from March 1975 | ||
| GS | Glasgow Salkeld Street | Closed | ||
| GS | Gloucester Station | GCR | General storage | |
| GU | Guide Bridge | Closed | ||
| GW | Glasgow Shields | XGW | Scotrail | Formerly GS |
| GY | Garston Yard | |||
| HA | Haymarket (Edinburgh) | XHA | Scotrail | |
| HB | East Coast Headquarters | 'Paper' code only | ||
| HB | Horbury | Marcroft Engineering | ||
| HC | Hornsey Up Carriage Siding (London) | DB Cargo | ||
| HC | Holyhead Carriage Sidings | Transport for Wales | ||
| HD | Holyhead | Transport for Wales | ||
| HE | Hornsey | XHE | Govia Thameslink Railway (Great Northern) | |
| HF | Hereford | DB Cargo | ||
| HG | Hither Green | DB Cargo | ||
| HH | Haworth | Keighley & Worth Valley Railway | ||
| HH | Hams Hall | GB Railfreight | ||
| HI | Hitchin | Balfour Beatty | ||
| HI | Forest (Brussels) (dummy) | See FF | ||
| HJ | Hoo Junction | Colas Rail | See also HN | |
| HM | Healey Mills | DB Cargo | ||
| HN | Hamilton | Closed 1982 | ||
| HN | Hoo Junction | DB Cargo | See also HJ | |
| HO | Leeds Holbeck | Network Rail | ||
| HO | North Pole International (London) (dummy) | See NP | ||
| HO | Hope Cement Works | Hope Cement | ||
| HP | Hope Blue Circle | Freightliner | ||
| HQ | BRB Headquarters | 'Paper' code only | ||
| HR | Hall Road | XHR | Network Rail | Closed 31 May 1997; reopened |
| HR | Gloucester Horton Road | Colas Rail | Code unconfirmed, see also GL | |
| HS | Bradford Hammerton Street | Closed 1994 | ||
| HS | Hoo Junction Fuel Point | DB Cargo | ||
| HT | Heaton | XHT | Arriva Rail North | |
| HU | Hunterston High Level | DB Cargo | ||
| HV | Hunterston High Level | Freightliner | ||
| HY | Oxford Hinksey Yard | Network Rail | ||
| HY | Hyndland | Closed | ||
| HZ | Heysham | Lancaster Carriage & Wagon | ||
| HZ | Le Landy (Paris) (dummy) | See LY | ||
| IG | Isle of Grain | Freightliner | ||
| IL | Ilford | XIF | Greater Anglia | |
| IM | Immingham | DB Cargo | ||
| IN | UK Industrial Sites | General code, not for a specific site | ||
| IN | Immingham Traction Maintenance Depot | Freightliner | ||
| IO | Immingham Reception | Freightliner | ||
| IP | Ipswich | XIP | Freightliner | |
| IS | Inverness | Scotrail | ||
| KC | Carlisle Currock Wagon Repair Depot | DB Cargo | ||
| KD | Carlisle Kingmoor | Direct Rail Services | Formerly KM | |
| KD | Carlisle New Yard | Became KM from January 1975 | ||
| KG | Knottingley | Freightliner | ||
| KI | Kidderminster | Severn Valley Railway | ||
| KK | Kirkdale | XKK | Merseyrail | |
| KK | Kilmarnock | Andrew Barclay | ||
| KL | Kings Lynn | |||
| KM | Carlisle Kingmoor | Became KD from January 1975 | ||
| KM | Carlisle Kingmoor | Direct Rail Services | Replaced Sellafield (SD) | |
| KM | Carlisle New Yard | XKY | Closed by 1987. Formerly KD | |
| KN | Kineton | |||
| KN | Kilnhurst Central | RFS Industries | ||
| KR | Kidderminster | Severn Valley Railway | ||
| KS | Sims | Training location | ||
| KT | Kineton | Ministry Of Defence | ||
| KX | King's Cross York Way | Closed 1980 | ||
| KY | Knottingley | DB Cargo | ||
| KZ | Killoch Colliery | Freightliner | ||
| LA | Laira | XLZ | Great Western Railway | |
| LB | Loughborough | Brush Traction | ||
| LC | Longsight Eurostar (Manchester) | XLI | Alstom | |
| LD | Leeds Midland Road | Freightliner | Same as Balm Road? | |
| LD | Llanelli | Closed | ||
| LE | Landore | XDL | Great Western Railway | Closed 19 November 2018 |
| LF | Leeds, Midland Road Wheel Lathe | Freightliner | ||
| LG | Longsight Electric | Arriva Rail North | ||
| LH | Lostock Hall | Closed | ||
| LI | Longsight Diesel | Siemens | ||
| LJ | Llandudno Junction | Closed | ||
| LK | Lackenby South Bank | Corus | ||
| LL | Liverpool (Downhills) | XDG XEG | Alstom | Depot also referred to as 'Edge Hill' or 'Alstom Liverpool Traincare Centre' |
| LL | Llangollen | Llangollen Railway | ||
| LM | Long Marston | Motorail Logistics | General storage site since 1999 | |
| LN | Lincoln | XTT | Closed | |
| LO | Longsight Diesel | Arriva Rail North | ||
| LP | Le Landy (Paris) | Became LY from 1994 | ||
| LR | Leicester | UK Rail Leasing | ||
| LS | Manchester Longsight Wheel Lathe | Alstom | ||
| LT | Longtown (Cumbria) | Ministry Of Defence | Unclear if code should be LW | |
| LT | Manchester Longsight Freight Terminal | unknown | ||
| LT | Longport | ElectroMotive Diesel | ||
| LV | London Liverpool Street | Greater Anglia? | ||
| LW | Lawley Street | Freightliner | ||
| LW | Longtown | Ministry Of Defence | ||
| LY | Lymer | Training location | ||
| LY | Le Landy (Paris) | SNCF | Formerly LP | |
| MA | Longsight Carriage | XML | Alstom | |
| MB | Middlesbrough | Closed | ||
| MC | March | Became MR from September 1973 | ||
| MD | Merehead | Mendip Rail | Formerly FY | |
| ME | Marylebone | XME | Closed 29 July 1992, replaced by Aylesbury (AL) | |
| ME | Manchester International (former Eurostar) | XLI | West Coast Traincare 5 June 2000 to 31 July 2005 Siemens (for Transpennine Express) | |
| ME | Mossend | DB Cargo | ||
| MG | Margam | DB Cargo | ||
| MH | Millerhill | DB Cargo | ||
| MI | Motherwell | Direct Rail Services | ||
| MK | Markinch | MNC | J Cameron | Closed? |
| ML | Motherwell | Network Rail | ||
| MM | Fire Service College, Moreton-in-Marsh | Cotswold Rail | ||
| MN | Machynlleth | XMC | Arriva Trains Wales/Transport for Wales | |
| MO | Morris Cowley | Closed | ||
| MO | Muir Of Ord | Temporary depot used 7 February 1989 to 9 May 1990 | ||
| MP | Manchester Piccadilly | |||
| MQ | Manchester Victoria | |||
| MQ | Meldon Quarry | Dartmoor Railway | ||
| MR | March | Closed. Formerly MC | ||
| MS | Manchester Longsight | General code covering LG and LO | ||
| MS | Mossend | XMS | DB Cargo | |
| MS | Malaga (Spain) | unknown | ||
| MS | Mountsorrel | GB Railfreight? | ||
| MV | Manchester Victoria | XVS | Also known as Red Bank; see also MQ | |
| MY | Mossend Yard | Freightliner | ||
| NA | Newton Abbot | Closed | ||
| NB | New Brighton Electric Multiple Unit Depot | Merseyrail | ||
| NB | New Biggin | GB Railfreight | ||
| NC | Norwich Crown Point | Greater Anglia | Depot opened 27 October 1982, replaced Norwich Thorpe (NR) | |
| ND | Neasden | London Underground | ||
| NG | New Cross Gate | Closed by 1997 | ||
| NG | New Cross Gate | London Overground | Later depot | |
| NH | Newton Heath | XNN | Arriva Rail North | |
| NJ | Norwood Down Sorting Sidings | unknown | Code unconfirmed | |
| NL | Neville Hill T&RSMD | XNL | East Midlands Railway to 16 October 2021 Northern Trains from 17 October 2021 | |
| NM | Nottingham Eastcroft | XNT | East Midlands Railway | |
| NN | Northampton Kings Heath | Siemens (for West Midlands Trains (London Northwestern Railway)) | ||
| NO | Norwich Thorpe | Became NR from September 1973 | ||
| NP | North Pole International | XNP | Hitachi Rail Europe | Closed; reopened 2016 |
| NR | Norwich Thorpe | Closed, replaced by Crown Point (NC). Formerly NO | ||
| NR | Norwich Crown Point Carriage Sidings | GB Railfreight | ||
| NT | Northam | XFS | Siemens (for South Western Railway) | |
| NU | Sheffield Nunnery | Sheffield Supertram | ||
| NV | Neville Hill | Freightliner | ||
| NW | Northwich | Brunner Mond | ||
| NY | Grosmont | North Yorkshire Moors Railway | ||
| OC | Old Oak Common Locomotive | XOL | DB Schenker | Closed |
| ? | Old Oak Common Crossrail | Bombardier | On site of locomotive depot OC | |
| OD | Old Dalby Test Track | Bombardier | ||
| OH | Old Oak Common Electric Multiple Unit Depot | Siemens (for Heathrow Express) | ||
| OK | Okehampton | Dartmoor Railway | ||
| OM | Old Oak Common Carriage | XOC | Great Western Railway | Closed |
| ON | Orpington | Southeastern Trains | ||
| OO | Old Oak Common HST | XOO | Great Western Railway | Closed 9 December 2018 |
| OW | Orient Way Carriage Sidings | XTX | London Eastern Railway/Abellio East Anglia | |
| OX | Oxford | XOX | Great Western Railway | |
| OY | Oxley | XOY | Alstom | |
| PA | Partick North Clyde | Closed | ||
| PA | St Pancras Cambridge Street | Closed | ||
| PB | Peterborough Locomotive Inspection Point | DB Cargo | ||
| PC | Polmadie Carriage Sidings | XPO | Alstom | |
| PD | Paddington | |||
| PE | Peterborough Crescent (Nene Sidings) | Govia Thameslink Railway (Great Northern) | ||
| PE | Peak Forest | Freightliner | ||
| PF | Peak Forest | DB Cargo | ||
| PG | Hull Paragon | Closed? | ||
| PG | Peterborough | Electro-Motive Services | Code used from May 2009 | |
| PH | Perth | XPH | Scotrail | |
| PI | Pwllheli | Closed (used 1980 only) | ||
| PI | North Pole International | XNP | Closed | |
| PL | Poole | |||
| PM | St Philips Marsh | XPM | Great Western Railway | |
| PN | Preston Station | XPT | Arriva Rail North | |
| PN | Poznan | Axiom | ||
| PO | Polmadie | XPO | Alstom | |
| PP | Pontypridd | |||
| PP | Polmadie Eurostar | Alstom | ||
| PQ | Harwich Parkeston Quay | DB Cargo | ||
| PR | Private Preservation Sites | 'Paper' code only | ||
| PR | Matlock | Peak Rail | ||
| PR | Preston Bakehouse Sidings | Virgin Trains West Coast | ||
| PS | Paisley Gilmour Street | Closed | ||
| PT | Preston | Closed | ||
| PT | Peterborough New England | GB Railfreight | Former OLE depot used by GB Railfreight since 2001 | |
| PY | Shoeburyness (Pigs Bay) | QinetiQ | ||
| PY | Pyle Hill | Closed | ||
| PZ | Penzance | Great Western Railway | ||
| QR | Quainton Road | Buckinghamshire Railway Centre | ||
| RB | Raneleigh Bridge | Closed | ||
| RB | Rylstone | Tilcon | ||
| RD | Reading West Yard | Closed | ||
| RE | Ramsgate | XRE | Southeastern Trains | Formerly RM |
| RG | Reading | XRG | Closed | |
| RG | Reading | Great Western Railway | Later depot | |
| RL | Ropley | Mid Hants Railway | ||
| RL | Ripple Lane | Closed | ||
| RM | Ramsgate | Became RE from December 1976 | ||
| RO | Rotherham Steel Terminal | DB Cargo | ||
| RR | Doncaster Roberts Road | ElectroMotive Diesel | ||
| RR | Radyr | Closed 1987 | ||
| RS | Doncaster Roberts Road | GB Railfreight | ||
| RS | Reddish | Closed | ||
| RT | Rotherham Steel Terminal | DB Cargo | ||
| RT | Railway Technical Centre | |||
| RU | Rugby | Colas | ||
| RV | Ravenstruther | Freightliner | ||
| RY | Ryde | South Western Railway (Island Line) | ||
| ? | Swansea Maliphant | Hitachi Rail Europe | ||
| SA | Salisbury | XFU | South Western Railway | |
| SB | Shirebrook | Closed 28 September 1996 | ||
| SB | Stourbridge Junction | Chiltern Railways | ||
| SB | Shrewsbury Coleham | Network Rail | ||
| SC | Scunthorpe | British Steel | ||
| SD | Sellafield | Closed 1999, replaced by Carlisle Kingmoor (KM) | ||
| SD | Springburn | Closed | ||
| SE | St Leonards | XSM | St Leonards Railway Engineering/GB Railfreight | |
| SF | Stratford | XSR | Closed. Formerly SX | |
| SG | Slade Green | Southeastern Trains | ||
| SH | Southampton | Freightliner | ||
| SH | Strawberry Hill | Became ST, date unknown | ||
| SH | Southall | West Coast Railway Company | Formerly SZ to 1987 | |
| SI | Soho | XSZ | West Midlands Trains (West Midlands Railway) | |
| SI | Strawberry Hill | See ST, believed noted in error | ||
| SI | Simonside Wagon Repair Depot | Closed | ||
| SJ | Shelton | Network Rail | ||
| SJ | Stourbridge Junction (Town Platform) | West Midlands Trains (West Midlands Railway) | ||
| SK | Swanwick | Midland Railway Centre | ||
| SK | Sunderland South Dock | Closed | ||
| SK | Stoke Gifford | Freightliner | ||
| SL | Stewarts Lane | XSL | Govia Thameslink Railway (Gatwick Express)/DB Cargo | |
| SM | Sheffield | Arriva Rail North | Replaced Sheffield Darnall (DA) | |
| SN | Shoeburyness Carriage Sidings | c2c | ||
| SN | Stranraer | Scotrail | ||
| SO | Southampton Maritime | Freightliner | ||
| SO | Southall | Became SZ, date unknown | ||
| SO | Soho | |||
| SO | Southport | General storage | ||
| SP | Springs Branch Component Recovery & Distribution Centre | XWM | DB Cargo | |
| SQ | Stockport Carriage Maintenance Depot | Arriva Rail North | ||
| SR | Stratford Major Depot/Level 5 | Closed 31 March 1991. Also known as 'High Meads', 'Stratford New Works', and 'Stratford Traction Repair Shops' | ||
| SR | Shrewsbury Coleham | Network Rail | ||
| SS | Salillas/Catalayud (Spain) | RENFE | ||
| SS | Sunderland | |||
| ST | Southport | Merseyrail | ||
| ST | Strawberry Hill | XSX | South Western Railway | East side of depot (west side is VZ). Formerly SH |
| ST | Severn Tunnel Junction | Closed | ||
| ST | Stoke Gifford | Hitachi Rail Europe | ||
| SU | Selhurst | XSH | Govia Thameslink Railway (Southern) | |
| SV | Wembley Wheel Lathe | Alstom | Although listed as being the wheel lathe, the code presumably also applies to an extended site, as some shunters and class 66s are 'allocated' to SV | |
| SV | Wembley | XWY | Chiltern Railways | Code is listed, but may be recorded in error (see also Wembley Wheel Lathe) |
| SW | Swindon | Closed 1990s | ||
| SW | Swanage | Swanage Railway | ||
| SX | Stratford Running Depot | Became SF from September 1973 | ||
| SX | Shrewsbury | Arriva Trains Wales/Transport for Wales | ||
| SY | Saltley | Closed 24 April 2005 | ||
| SZ | Southampton Maritime | Freightliner/GB Railfreight | ||
| SZ | Southall | Formerly SO, became SH 1987 | ||
| TB | Three Bridges | XTB | Siemens | DB Schenker to 2015 |
| TB | Tilburg (Netherlands) | NS | ||
| TD | Tyne Dock Mobile | |||
| TD | Temple Mills (Stratford) | DB Cargo | ||
| TE | Thornaby | XTE | DB Cargo | |
| TF | Thornton Field Carriage Sidings | XTF | Closed | |
| TF | York Yard South | Freightliner | ||
| TG | Teigngrace | Colas Rail | ||
| TG | Tonbridge | Closed | ||
| TG | Tonbridge Jubilee Sidings | XJU | South Eastern Trains | |
| TH | Thornaby | XTE | Freightliner | |
| TI | Tinsley Yard | XTD | Closed 1998 | |
| TI | Temple Mills International | Eurostar (UK) | ||
| TJ | Tavistock Junction | Colas Rail | ||
| TJ | Thornton Junction | XTJ | DB Cargo/Scotrail | |
| TK | Tyne Dock | GB Railfreight | ||
| TL | Cardiff Tidal Sidings | |||
| TL | Tilbury | Closed | ||
| TL | Tilbury Rail Container Terminal | Freightliner | ||
| TM | Tyseley Standard Gauge Steam Trust Tyseley Light Maintenance Depot | XTS | Birmingham Railway Museum | |
| TN | Taunton | West Somerset Railway | ||
| TN | Thornton Junction | DB Cargo | ||
| TO | Toton | DB Cargo | ||
| TP | Trafford Park (Barton Dock) | DB Cargo/Freightliner | ||
| TR | Teesport Freightliner Terminal | Freightliner | ||
| TS | Tyseley | West Midlands Trains (West Midlands Railway) | ||
| TT | Toton Training School | DB Cargo | ||
| TU | Toton Up Yard | DB Cargo | ||
| TW | Tunbridge Wells West | Closed | ||
| TW | Toton Wagon Repair Depot | DB Cargo | Code unconfirmed | |
| TY | Tyne Yard | DB Cargo | ||
| TZ | Thoresby Colliery Junction | Freightliner | ||
| VI | Victoria | South Eastern Trains | ||
| VM | Velim Test Track | Czech Republic test track | ||
| VR | Aberystwyth | Arriva Trains Wales/Transport for Wales | ||
| VR | Aberystwyth Vale of Rheidol | Vale of Rheidol Railway | ||
| VW | Alstom HG (West Coast) | Alstom | Code unconfirmed | |
| VZ | Strawberry Hill | XSX | Siemens | West side of depot (east side is SH) |
| WA | Warrington Arpley | DB Cargo | ||
| WA | Wishaw | Goodmans | ||
| WB | Wembley Carriage Sidings | Alstom | ||
| WC | Waterloo and City | London Underground | ||
| WD | Wimbledon | South Western Railway | Formerly WM | |
| WE | Wembley | XWF | DB Cargo | |
| WE | Willesden Brent | DB Cargo | ||
| WF | Wakefield | |||
| WF | Wansford | Nene Valley Railway | ||
| WH | Wath | Closed January 1983 | ||
| WH | Whatley | Mendip Rail | Formerly AC | |
| WH | Washwood Heath | Boden Rail | ||
| WI | Wilton | SemCorp Utilities | ||
| WJ | Watford Junction | Closed | ||
| WK | West Kirby | Merseyrail | ||
| WK | Workington | Arriva Rail North | ||
| WL | Wellingborough | GB Railfreight | ||
| WM | Wimbledon | Became WD from December 1976 | ||
| WN | Willesden | West Coast Traincare to 11 May 2007 London Overground | ||
| WO | Wellingborough | Closed | ||
| WO | Wolsingham | Weardale Railway/RMS Locotec | ||
| WO | Woking | |||
| WP | Worksop Wagon Repair Depot | Closed | ||
| WQ | DB Cargo Board | 'Paper' code only | ||
| WR | West Ruislip | London Underground | ||
| WS | Worcester | XWR | West Midlands Trains (West Midlands Railway) | |
| WS | Worksop | DB Cargo | ||
| WT | Warrington Arpley | DB Cargo | ||
| WT | Westhouses | Closed. Formerly WU | ||
| WU | Westhouses | Became WT from January 1975 | ||
| WU | Wembley Traction Maintenance Depot | Chiltern Railways | ||
| WV | Manistry Wharf (Ellesmere Port) | Freightliner | ||
| WW | Washwood Heath Loco Servicing Road 26 | DB Cargo | ||
| WY | Wembley Yard | DB Cargo | Possibly recorded in error (see WB, WE and Westbury (WY)) | |
| WY | Westbury | DB Cargo | ||
| WZ | Warsaw (Poland) | Freightliner | ||
| XB | Beever Carriage Maintenance Depot | Training location | ||
| XW | Crofton Depot | XRF | Bombardier | See also CX |
| XX | Not Yet Allocated | 'Paper' code only | ||
| YC | York Clifton | Closed | ||
| YK | York | DB Cargo | ||
| YK | York | XYK | Siemens to 14 September 2021 Siemens Mobility from 15 September 2021 | |
| YL | York Leeman Road | Freightliner | ||
| YM | York National Railway Museum | Science Museum | ||
| YO | Yoker | XYD | Scotrail | |
| YS | York South Sidings | XYS | DB Cargo | |
| YV | Yarmouth Vauxhall | Greater Anglia | Closed; reopened 2020 | |
| ZA | RTC Business Park (Derby) | Rail Vehicle Engineering | ||
| ZA | Hamilton Steel | |||
| ZA | Cardiff | Allied Steel & Wire | ||
| ZB | Doncaster Works | Wabtec | ||
| ZC | Crewe Works | Bombardier | ||
| ZD | Derby Litchurch Lane Works | Bombardier | ||
| ZE | Washwood Heath | Boden Rail/Colas Rail/Hanson Rail | Closed March 2005; reopened. See also WH | |
| ZE | Derby Loco Works | Closed (demolished 2006) | ||
| ZF | Doncaster Works | Bombardier | ||
| ZG | Eastleigh Works | XFB | Arlington Fleet Services | Closed 31 March 2006; reopened |
| ZH | Springburn Works Glasgow | Knorr-Bremse Rail Systems (UK) Limited | ||
| ZI | Ilford Works | Bombardier | ||
| ZJ | Immingham | Immingham Railfreight Terminals scrapyard | ||
| ZJ | Horwich Works | Closed | ||
| ZJ | Stoke On Trent | Turner's | Same site as ZW (Marcroft) | |
| ZK | Shildon Wagon Works | Closed | ||
| ZK | Kilmarnock Works | Wabtec | ||
| ZL | Dewsbury | Closed 2006 (RMS Locotech moved to Wakefield) | ||
| ZL | Swindon Works | Closed 1986 | ||
| ZL | Cardiff Cathays Works | Closed | ||
| ZM | Glasgow | Closed 1999 | ||
| ZM | Temple Mills Wagon Works | Closed | ||
| ZM | Kilmarnock | Brody Engineering | ||
| ZM | March | Marcroft | Closed? | |
| ZN | Wolverton Works | XGH | Knorr-Bremse Rail Systems (UK) Limited | |
| ZO | Polmadie | Alstom | ||
| ZP | Horbury Works (Wakefield) | XHB | Closed | |
| ZP | Radyr | Powell Duffryn | Closed | |
| ZQ | BRB Headquarters | 'Paper' code only | ||
| ZR | Rotherham | C F Booth | ||
| ZR | York Works | Network Rail | ||
| ZS | Shildon | Closed | ||
| ZS | Wakefield | RMS Locotech | ||
| ZT | Stockton | T J Thomson | ||
| ZT | Temple Mills | Closed | ||
| ZU | Level 5 Selhurst | Govia Thameslink Railway (Southern) | ||
| ZW | Stoke On Trent | Axiom Rail | ||
| ZW | Walker | Training location | ||
| ZW | Railcar Services | |||
| ZX | Raxstar (S Wales) | Raxstar | ||
| ZZ | Various Sites For Scrap | 'Paper' code only |