TOPS Locomotive, Depot, and Pool codes - top page
INTRODUCTION
The following is a list of TOPS Depot Codes which can be used in conjunction with the locomotive stock changes in the “Railway Observer” which is published monthly by the Railway Correspondence and Travel Society.
Depots recorded with an asterisk have an allocation of locomotives although in some cases RSL/TOPS records may not be accurate.
RECENT UPDATES
24.12.2021: Change of Operator: Ashford - SE Trains Limited replaced Hitachi Rail Europe Ltd
17.10.2021: Change of Operator: Neville Hill T&RMD – Northern Trains Limited replaced Abellio East Midlands Limited
17.10.2021: Change of Franchise: SE Trains Limited replaced London & South Eastern Railway Limited
09.02.2021: Transport for Wales Ltd replaced Franchise – Gweithrediadau Keolis Amey Limited
| AC | Aberdeen, Clayhills T&RSMD | .. | London North Eastern Railway Limited |
| AD | New Ashford, EMUD | .. | SE Trains Limited |
| AF | Ashford, Chart Leacon TMD (Closed) | .. | .. |
| AK | Ardwick T&RSMD, Manchester | .. | Siemens Transportation Systems |
| AL | Aylesbury T&RS | .. | Chiltern Railways Company Limited |
| AN | Allerton Depot | .. | Northern Trains Limited |
| AO | Acton LHS | .. | DB Cargo UK |
| AT | Alstom, Birmingham (WCML) (Closed) | .. | Alstom |
| AV | Avonmouth BBHT | .. | Freightliner Group Ltd |
| AW | Ardwick West (WCRM) | .. | Network Rail Infrastructure Limited |
| AZ | Alizay, France | * | Axiom Rail |
| BA | Basford Hall | .. | Freightliner Group Ltd |
| BB | Boulby Mine Carlin How (FLHH) | .. | Freightliner Heavy Haul Ltd |
| BC | Boden Rail Loco Depot (Nottingham Eastcroft Carriage Sidings) | .. | Boden Rail Engineering Ltd |
| BD | Birkenhead North TMD | .. | Merseyrail |
| BE | Barnetby East Engineers Siding FP | .. | Freightliner Group Ltd |
| BF | Bedford, Cauldwell Walk Depot | .. | Govia Thameslink Railway Limited |
| BG | Botinic Gardens (Hull) DMUD | .. | First TransPennine Express |
| BH | Barrow Hill SD | * | Barrow Hill Ltd |
| BH | Barrow Hill SD (FLHH) | .. | Freightliner Heavy Haul Ltd |
| BI | Brighton Lovers Walk | .. | Govia Thameslink Railway Limited |
| BI | Brighton TMD | .. | Govia Thameslink Railway Limited |
| BK | Bristol Barton Hill | .. | London and North Western Railway Co. Ltd |
| BL | Basford Hall Depot (Freightliner) | .. | Freightliner Group Ltd |
| BM | Bournemouth West TMD | .. | First MTR South Western Trains Limited |
| BN | Bounds Green T&RSMD | * | Hitachi Rail Europe Ltd |
| BO | Burton upon Trent T&RSMD | * | Nemesis Rail Limited |
| BP | Blackpool North CARMD | .. | Northern Trains Limited |
| BQ | Bardon Hill Quarry | .. | Freightliner Group Ltd |
| BR | Banbury Depot (LMD) | .. | Chiltern Railways Company Limited |
| BR | Bristol Kingsland Road | .. | Network Rail Infrastructure Limited |
| BS | Bescot TMD | .. | DB Cargo UK |
| BT | Bo'ness, Bo'ness & Kinneil Railway | * | Bo’ness & Kinneil Railway |
| BU | Burngullow (FLHH) | .. | Freightliner Heavy Haul Ltd |
| BW | Barrow-in-Furness SD | .. | Northern Trains Limited |
| BX | Buxton TMD (Closed) | .. | .. |
| BY | Bletchley TMD | .. | West Midlands Trains Ltd |
| BZ | St. Blazey SD | .. | DB Cargo UK |
| CA | Carlisle New Yard DBS Loco Maintenance Point | .. | DB Cargo UK |
| CB | Condor Park, Butterley | * | Midland Railway Centre |
| CC | Clacton on Sea SD | .. | Abellio Greater Anglia Ltd |
| CD | Crewe Diesel MD | * | Locomotive Storage Ltd |
| CE | Crewe Electric MD | * | DB Cargo UK |
| CF | Cardiff Canton Sidings | .. | Transport for Wales Limited |
| CF | Cardiff Canton TMD | .. | Pullman Rail Ltd |
| CG | Crewe CS LNWR (FLHH) | .. | Freightliner Heavy Haul Ltd |
| CG | Crewe Virtual Quarry | .. | Network Rail Infrastructure Limited |
| CH | Chester TMD | .. | CAF Rail Traincare Limited |
| CJ | Clapham Junction CSD | .. | First MTR South Western Trains Limited |
| CK | Corkerhill CSMD | .. | ScotRail Trains Limited |
| CL | Carlisle Upperby T&RSMD (Closed) | .. | .. |
| CM | Basford Hall Fuel Point | .. | Freightliner Group Ltd |
| CM | Camden CSD | .. | West Midlands Trains Ltd |
| CN | Chaddesden Sidings, Derby | .. | Freightliner Group Ltd |
| CO | Coquelles, France | * | Groupe Eurotunnel S.A. |
| CP | Crewe CS | * | London and North Western Railway Co. Ltd |
| CQ | Crewe Railway Age | * | Crewe Heritage Centre |
| CQ | Crewe Gresty Lane (DRS) | .. | Direct Rail Services Ltd |
| CR | Colchester SD | .. | Abellio Greater Anglia Ltd |
| CR | Crewe Gresty Bridge Loco SD (DRS) | .. | Direct Rail Services Ltd |
| CS | Carnforth (WCR) | * | West Coast Railway Company |
| CT | Cleethorpes Station | .. | First TransPennine Express |
| CU | Coatbridge FLT | .. | Freightliner Group Ltd |
| CW | Cricklewood Depot | .. | Abellio East Midlands Limited |
| CX | Chalmerston | .. | Freightliner Heavy Haul Ltd |
| CZ | Central Rivers, Barton-under-Needwood RSMD | .. | Bombardier Transportation |
| DF | Derby RTC | * | Loram UK Ltd |
| DH | Dereham | .. | Mid Norfolk Railway |
| DI | Didcot, GWS | * | Great Western Society |
| DL | Dollands Moor Loco Repair Siding | .. | DB Cargo UK |
| DM | Dagenham Dock (FLHH) | .. | Freightliner Heavy Haul Ltd |
| DM | Dagenham Dock HS (Closed) | .. | .. |
| DR | Doncaster Carr TMD | * | Hitachi Rail Europe Ltd |
| DT | Didcot Triangle FP | .. | DB Cargo UK |
| DU | Doncaster Up Decoy LMD | .. | DB Cargo UK |
| DV | Daventry | .. | Direct Rail Services Ltd |
| DY | Derby Etches Park HST | * | Abellio East Midlands Limited |
| EC | Edinburgh Craigentinny T&RSMD | * | Hitachi Rail Europe Ltd |
| EH | Eastleigh TMD | * | London and North Western Railway Co. Ltd |
| EI | Edinburgh Craigentinny CS | .. | London North Eastern Railway Limited |
| EJ | Leith South (FLHH/LaFarge) | .. | Freightliner Heavy Haul Ltd |
| EL | East Lancashire Railway, Heywood, | .. | East Lancashire Railway |
| EM | East Ham EMD | .. | c2c Rail Ltd |
| EP | Edinburgh Portobello Junction | .. | Network Rail Infrastructure Limited |
| ER | Eurre, France | .. | SNCF |
| ES | Earles Sidings (FLTT) | .. | Freightliner Group Ltd |
| ET | Eastleigh TMD (Freightliner) | .. | Freightliner Group Ltd |
| EU | East Usk, Newport, Servicing Road | .. | DB Cargo UK |
| EX | Exeter St.Davids CS FP | .. | First Greater Western Limited |
| EX | Exeter St.Davids SD | .. | First Greater Western Limited |
| FA | Fairwater, Taunton (FLHH) | .. | Freightliner Heavy Haul Ltd |
| FB | Ferrybridge Loco Maintenance Depot | .. | DB Cargo UK |
| FD | Freightliner Nationwide, Diesel Locos | * | Freightliner Group Ltd |
| FE | Freightliner Nationwide, Electric Locos | * | Freightliner Group Ltd |
| FF | Brussels Forest T&RSMD | .. | SNCB |
| FH | Frodingham (Scunthorpe) SD | .. | Grant Rail |
| FN | Felixstowe North Docks (GBRf) | .. | GB Railfreight |
| FP | Ferme Park FP | .. | London North Eastern Railway Limited |
| FP | Ferme Park FP (GBRf) | .. | GB Railfreight |
| FR | Fratton CSD | .. | First MTR South Western Trains Limited |
| FT | Frethun, Calais (Tunnel), France | .. | SNCF |
| FT | Frethun, Calais Depot, France | .. | SNCF |
| FW | Fort William FP | * | DB Cargo UK |
| FW | Fort William Station | .. | ScotRail Trains Limited |
| FZ | Fort William Junction Yard | .. | DB Cargo UK |
| GB | Guide Bridge (WCRM) | .. | ISU (CE) |
| GB | Guide Bridge Yard (FLHH) | .. | Freightliner Heavy Haul Ltd |
| GD | Gascoigne Wood Sidings | .. | DB Cargo UK |
| GI | Gillingham (Kent) EMUD | .. | SE Trains Limited |
| GL | Gloucester (Cotswold Rail) (Now Colas Rail) | .. | Colas Rail Limited |
| GL | Gloucester SD | .. | ISU (CE) |
| GN | Garston FLT | .. | Freightliner Group Ltd |
| GO | Gulf Oil, Waterston (Closed) | .. | .. |
| GW | Glasgow Shields EMD | .. | ScotRail Trains Limited |
| HA | Haymarket (Edinburgh) TMD | * | ScotRail Trains Limited |
| HC | Holyhead CS | .. | Transport for Wales Limited |
| HD | Holyhead SD | .. | Transport for Wales Limited |
| HE | Hornsey EMUD | .. | Govia Thameslink Railway Limited |
| HE | Hornsey EMUD Wheel Lathe | .. | Govia Thameslink Railway Limited |
| HF | Hereford FP | .. | DB Cargo UK |
| HG | Hither Green TMD | .. | DB Cargo UK |
| HH | Hams Hall (GBRf) | .. | GB Railfreight |
| HM | Healey Mills TMD (Closed) | .. | .. |
| HN | Hoo Junction Up Yard | .. | DB Cargo UK |
| HO | Holbeck (Leeds) TMD | .. | ISU (CE) |
| HP | Hope Blue Circle (FLHH) | .. | Freightliner Maintenance Limited |
| HQ | HQ Locos | * | .. |
| HR | Gloucester Horton Road | .. | Colas Rail Limited |
| HS | Hoo Junction Fuel Point | .. | DB Cargo UK |
| HT | Heaton T&RSMD | .. | Northern Trains Limited |
| HU | Hunterston High Level Sidings | .. | DB Cargo UK |
| HV | Hunterston High Level Sidings (FLHH) | .. | Freightliner Heavy Haul Ltd |
| IF | Ipswich Vehicle Maintenance Facility Fuel Point | .. | Freightliner Maintenance Limited |
| IG | Isle of Grain Thamesport Terminal | .. | Freightliner Group Ltd |
| IL | Ilford EMD | .. | Abellio Greater Anglia Ltd |
| IL | Old Oak Common (Crossrail) | .. | Bombardier Transportation |
| IM | Immingham Reception | .. | DB Cargo UK |
| IM | Immingham TMD | .. | DB Cargo UK |
| IN | Immingham B4 Sidings | .. | DB Cargo UK |
| IO | Immingham Dock Reception (FLHH) | .. | Freightliner Heavy Haul Ltd |
| IP | Ipswich FP | .. | Abellio Greater Anglia Ltd |
| IP | Ipswich LHS | .. | Freightliner Group Ltd |
| IS | Inverness CSMD | .. | ScotRail Trains Limited |
| IS | Inverness TMD | .. | ScotRail Trains Limited |
| IV | Ipswich Vehicle Maintenance Facility Wagon Shed | .. | Freightliner Maintenance Limited |
| IW | Ipswich Vehicle Maintenance Facility Wheel Lathe | .. | Freightliner Maintenance Limited |
| KG | Knottingley TMD (FLHH) | .. | DB Cargo UK |
| KI | Kidderminster TMD (SVR) | * | Severn Valley Railway |
| KM | Kingmoor, Carlisle, TMD | * | Direct Rail Services Ltd |
| KR | Bridgenorth | * | Severn Valley Railway |
| KT | Kineton, Fenny Compton, MOD | .. | Ministry of Defence |
| KY | Knottingley TMD | .. | DB Cargo UK |
| KY | Knottingley WRD | .. | DB Cargo UK |
| KZ | Killoch Colliery | .. | Freightliner Heavy Haul Ltd |
| LA | Laira (Plymouth) TMD | * | First Greater Western Limited |
| LA | Laira (Plymouth) CEM Depot | .. | First Greater Western Limited |
| LB | Loughborough Works (Brush Traction) | .. | Brush Traction, Wabtec Corporation |
| LD | Leeds, Midland Road T&RSMD | * | Freightliner Maintenance Limited |
| LE | Landore (Swansea) TMD | * | Chrysalis Rail Services Ltd |
| LF | Leeds, Midland Road Wheel Lathe | .. | Freightliner Maintenance Limited |
| LG | Longsight, Manchester EMD | .. | Northern Trains Limited |
| LI | Longslght Manchester DMD | .. | Siemens Transportation Systems |
| LJ | Llandudno Junction SD (Closed) | .. | .. |
| LK | South Bank Lackenby | .. | Corus |
| LL | Liverpool, Edge Hill Traincare Centre | * | Alstom |
| LM | Long Marston | * | Chrysalis Rail Services Ltd |
| LO | Longsight, Manchester DMD | * | Alstom |
| LR | Leicester Loco SD | * | UK Rail Leasing |
| LS | Longsight Wheel Lathe | .. | Alstom |
| LS | Manchester Int Depot (FL) | .. | Freightliner Heavy Haul Ltd |
| LT | Longport Freight Depot | .. | DB Cargo UK |
| LT | Longport Pinnox Branch | .. | DB Cargo UK |
| LW | Lawley Street, Birmingham FLT | .. | Freightliner Group Ltd |
| LY | Parus Le Landy T&RSMD | .. | SNCF |
| MA | Manchester, Longsight CS | .. | Alstom |
| MD | Merehead TMD | * | Freightliner Heavy Haul Ltd |
| ME | Mossend TMD | .. | DB Cargo UK |
| MF | Mountfield | .. | GB Railfreight |
| MG | Margam TMD (Closed) | .. | .. |
| MH | Millerhill Loco Inspection Point (Closed) | .. | .. |
| MH | Millerhill Yard | .. | DB Cargo UK |
| MI | Motherwell Repair Point (DRS) | .. | Direct Rail Services Ltd |
| MK | Markinch (Charter/PO) | .. | ScotRail Trains Limited |
| ML | Motherwell TMD | .. | Network Rail Infrastructure Limited |
| MN | Machynlleth | .. | Transport for Wales Limited |
| MN | Machynlleth Station FP | .. | Transport for Wales Limited |
| MO | Morris Cowley FD (Closed) | .. | .. |
| MO | Morris Cowley Mat Transport (Closed) | .. | .. |
| MR | March TMD (March Down Refuge Siding) | .. | GB Railfreight |
| MS | Mountsorrell Loco Servicing Road | .. | DB Cargo UK |
| MT | Merehead TMD (FLHH) | .. | Freightliner Heavy Haul Ltd |
| NB | New Biggin (GBRf) | .. | GB Railfreight |
| NC | Norwich Crown Point T&RSMD | .. | Abellio Greater Anglia Ltd |
| ND | Neasden Depot (LUL) | .. | London Underground Ltd |
| NG | New Cross Gate CSD | .. | London Overground |
| NH | Newton Heath, Manchester TMD | .. | Northern Trains Limited |
| NL | Neville Hill T&RMD | * | Northern Trains Limited |
| NM | Nottingham Eastcroft CMD | .. | Abellio East Midlands Limited |
| NM | Nottingham SD | .. | Abellio East Midlands Limited |
| NN | Northampton, Kings Heath EMUD | .. | Siemens Transportation Systems |
| NP | North Pole IEP Depot | .. | Hitachi Rail Europe Ltd |
| NR | Norwich Crown Point CS (GBRf) | .. | GB Railfreight |
| NT | Northam, Southampton, Depot | .. | Siemens Transportation Systems |
| NU | Nunnery (Sheffield Supertram) | .. | Sheffield Supertram |
| NV | Neville Hill Depot (FLHH) | .. | Abellio East Midlands Limited |
| NY | Grosmont NYM Railway | .. | North Yorkshire Moors Railway |
| NY | Grosmont Station | .. | Northern Trains Limited |
| OC | Old Oak Common Diesel TMD (Closed) | .. | .. |
| OE | Old Oak Common EWS (Closed) | .. | .. |
| OH | Old Oak Common EMUD (Closed) | .. | .. |
| OM | Old Oak Common CS (Closed) | .. | .. |
| OO | Old Oak Common HST Depot (Closed) | .. | .. |
| OX | Oxford SD | .. | .. |
| OY | Oxley, Midlands Traincare Centre | * | Alstom |
| PB | Peterborough NVR | .. | Nene Valley Railway |
| PB | Peterborough SD | .. | DB Cargo UK |
| PC | Polmadie, Traincare Centre | .. | Alstom |
| PE | Peak Forest FP (FLHH) | .. | Freightliner Heavy Haul Ltd |
| PF | Peak Forest South | .. | DB Cargo UK |
| PG | Peterborough SD, GBRF | * | Electro-Motive Services International Ltd |
| PH | Perth Station FP | .. | ScotRail Trains Limited |
| PM | St. Phillips Marsh HST Depot | * | First Greater Western Limited |
| PN | Poznan, Poland | * | Axiom Rail |
| PO | Polmadie Civil Engineer's Depot | .. | ISU (CE) |
| PR | Preston Bakehouse Sidings | .. | First Trenitalia |
| PT | Peterborough GBRf SD | .. | GB Railfreight |
| PZ | Penzance SD | * | First Greater Western Limited |
| QR | Quainton Road | .. | Buckinghamshire Railway Centre |
| RB | Rylstone | .. | Tilcon |
| RD | Reading West Junction Yard | .. | Network Rail Infrastructure Limited |
| RG | Reading Traincare Depot | * | First Greater Western Limited |
| RG | Reading TMD (Closed) | .. | .. |
| RI | Ruddington InterCity | .. | Great Central Railway (North) |
| RL | Ropley (Mid-Hants) | * | Mid Hants Railway |
| RM | Ramsgate EMUD | .. | SE Trains Limited |
| RR | Roberts Road, Doncaster | .. | Electro-Motive Services International Ltd |
| RS | Roberts Road, Doncaster (GBRF) | * | GB Railfreight |
| RT | Rotherham Masborough FD | .. | DB Cargo UK |
| RU | Rugby DED (Colas Rail, Operations Centre) | * | Colas Rail Limited |
| RU | Rugby GTRM Depot (Mill Road - FLHH) | .. | Freightliner Heavy Haul Ltd |
| RV | Ravenstruther Crouch Mining | .. | Freightliner Heavy Haul Ltd |
| RY | Ryde, I.O.W. Maintenance Depot | .. | First MTR South Western Trains Limited |
| SA | Salisbury Depot | .. | First MTR South Western Trains Limited |
| SA | Swanage | .. | Swanage Railway |
| SB | Selby | .. | GB Railfreight |
| SC | Scunthorpe LHS | .. | DB Cargo UK |
| SD | Sellafield (BNFL) SD | .. | Direct Rail Services Ltd |
| SE | St. Leonards West Marina | * | St. Leonards Railway Engineering |
| SE | St. Leonards West Marina (GBRf) | .. | GB Railfreight |
| SF | Scarborough TMD | .. | First TransPennine Express |
| SG | Slade Green TMD | .. | SE Trains Limited |
| SH | Southall DMU Depot | .. | West Coast Railway Company |
| SJ | Shelton Maint Point (WCRM) | .. | Network Rail Infrastructure Limited |
| SK | Stoke Gifford FLH | .. | Freightliner Heavy Haul Ltd |
| SK | Stoke Gifford LMD | .. | Freightliner Group Ltd |
| SK | Swanwick Junction, Midland Railway | .. | Midland Railway Centre |
| SL | Stewarts Lane TMD | * | DB Cargo UK |
| SM | Sheffield FP | .. | Northern Trains Limited |
| SN | Stranraer Town Freight Depot (Closed) | .. | .. |
| SO | Soho LMD | .. | West Midlands Trains Ltd |
| SO | Southampton FL Sidings | .. | Freightliner Group Ltd |
| SP | Springs Branch, Wigan TMD | .. | DB Cargo UK |
| SR | Shrewsbury, Coleham (ERTMS) | .. | Network Rail Infrastructure Limited |
| SU | Selhurst T&RSMD | .. | Govia Thameslink Railway Limited |
| SV | Stonebridge Park,Wembley Heavy Repair Depot, Wheel Lathe | * | Alstom |
| SW | Swindon SD (Closed) | .. | .. |
| SY | Saltley SD (Closed) | .. | .. |
| SZ | Southampton Maritime TML | .. | Freightliner Group Ltd |
| SZ | Southampton Western Docks Berth 109 | .. | GB Railfreight |
| TB | Three Bridges Thameslink Up Depot | .. | Siemens Transportation Systems |
| TE | Tees Yard FP | .. | DB Cargo UK |
| TE | Thornaby TMD (Closed) | .. | .. |
| TF | York Yard South (FLHH) | .. | Freightliner Heavy Haul Ltd |
| TG | Teigngrace | .. | Colas Rail Limited |
| TG | Tonbridge WRCS (Loco Holding Siding) | .. | DB Cargo UK |
| TH | Thornaby TMD (Freightliner) | .. | Freightliner Group Ltd |
| TI | Temple Mills International Depot | .. | Eurostar (UK) Ltd |
| TJ | Tavistock Junction (Colas) Plant Depot | .. | Colas Rail Limited |
| TK | Butterwell Opencast | .. | GB Railfreight |
| TK | North Blyth | .. | GB Railfreight |
| TK | Tyne Dock (GBRf) | .. | GB Railfreight |
| TL | Tilbury Rail Container Terminal | .. | Freightliner Group Ltd |
| TM | Tyseley Railway Museum | * | Tyseley Locomotive Works |
| TN | Thornton FP | .. | DB Cargo UK |
| TO | Toton TMD | * | DB Cargo UK |
| TP | Trafford Park FLT | .. | Freightliner Group Ltd |
| TP | Trafford Park Sidings | .. | DB Cargo UK |
| TR | South Bank Tees Dock Corus FLT | .. | Freightliner Group Ltd |
| TS | Tyseley TMD | * | West Midlands Trains Ltd |
| TU | Tunstead Fuel Point | .. | Freightliner Heavy Haul Ltd |
| TY | Tyne Yard T&RSMD | .. | DB Cargo UK |
| TZ | Thoresby Colliery Junction Sidings | .. | Freightliner Group Ltd |
| VW | Alstom Traincare (WCML) | .. | Alstom |
| WA | Wishaw (Dunton Park) | * | Moveright International Ltd |
| WB | Wembley Traincare Centre | * | Alstom |
| WD | East Wimbledon EMUD | * | First MTR South Western Trains Limited |
| WE | Wembley Brent Sidings | .. | DB Cargo UK |
| WE | Wembley LHS | .. | DB Cargo UK |
| WE | Wembley Yard DBS | .. | DB Cargo UK |
| WE | Willesden PRDC | .. | Royal Mail |
| WF | Wansford, Nene Valley Railway | .. | Nene Valley Railway |
| WH | Whatley TMD | .. | Freightliner Heavy Haul Ltd |
| WI | South Bank Wilton Works | * | SembCorp Utilities |
| WK | Workington Town | .. | ISU (CE) |
| WL | Wellingborough Up Sidings (GBRf) | .. | GB Railfreight |
| WM | Whatley TMD (FLHH) | .. | Freightliner Heavy Haul Ltd |
| WN | Willesden TMD | .. | Bombardier Transportation |
| WQ | DB Schenker Headquarters | .. | DB Cargo UK |
| WR | West Ruislip Depot, LUL | * | London Underground Ltd |
| WS | Worksop LHS | .. | DB Cargo UK |
| WT | Warrington Arpley Fuelling Apron | .. | DB Cargo UK |
| WU | Wembley TMD | .. | Chiltern Railways Company Limited |
| WV | Manistry Wharf, Ellesmere Port (FLHH) | .. | Freightliner Heavy Haul Ltd |
| WW | Washwood Heath Loco Servicing Road Number 26 | .. | DB Cargo UK |
| WW | Washwood Heath Met Camm (Closed) | .. | .. |
| WY | Westbury SD | .. | DB Cargo UK |
| WZ | Warsaw, Poland | * | Freightliner Group Ltd |
| XW | Crofton Depot, Wakefield | .. | Bombardier Transportation |
| YK | York National Railway Museum | * | National Railway Museum |
| YL | York GR Shed | .. | Freightliner Group Ltd |
| YO | York DMUD | .. | Siemens Transportation Systems |
| ZA | Derby RTC | * | Network Rail Infrastructure Limited |
| ZB | Doncaster Works, Wabtec Rail | .. | Wabtec Rail Ltd, Wabtec Corporation |
| ZC | Crewe Works | .. | Bombardier Transportation |
| ZD | Derby Litchurch Lane Works | .. | Bombardier Transportation |
| ZF | Doncaster Works (Closed) | * | .. |
| ZG | Eastleigh Works | * | Arlington Fleet Services |
| ZH | Glasgow Renovation Centre, Springburn (Closed) | * | .. |
| ZI | Ilford Depot | .. | Bombardier Transportation |
| ZI | Ilford Wheel Lathe | .. | Bombardier Transportation |
| ZJ | Stoke on Trent, Turners, c/o Marcroft Engineering | .. | Turners |
| ZK | Kilmarnock, Hunslet Barclay (Caledonia Works) | .. | Brodie Engineering Limited |
| ZN | Wolverton Renovation Centre | * | Gemini Rail Services UK Ltd |
| ZU | Selhurst CEM Depot | .. | Govia Thameslink Railway Limited |
| ZV | Inverness CSMD, Sleepers | .. | Serco Caledonian Sleepers Ltd |
| ZW | Stoke-on-Trent, Marcroft Engineering | .. | Axiom Rail (Stoke) Limited |
| ZW | Walker | .. | Training Location |
| ZX | Llanwern CAF Works | .. | CAF |