TOPS Loco Pool Codes
TOPS Locomotive, Depot, and Pool codes – top page
INTRODUCTION
The following is a list of TOPS Locomotive Pool 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.
There are a number of codes which are still “live” on the system, but they have no allocation and are unlikely to be used.
Finally, two ghost pools (DXXB and DXXC) are on the system; these, together with a number of ghost locomotive numbers, are only used for staff TOPS training purposes.
RECENT UPDATES
13.01.2022: Pool LSLO – Revised
12.01.2022: Pool HNRS – Revised
08.01.2022: Pool WBAI – Revised
26.12.2021: Pool GBEB – Revised; Pool GBOB – Revised
13.12.2021: Pool XHNC – Revised
18.10.1921: Pool MNXZ – New
08.10.2021: Pool GBBR – Revised; Pool GBSD – Revised; Pool GBZZ – Re-activated
06.10.2021: Pool AWCA – Revised
15.09.2021: Pool WQDA – Re-activated
25.07.2021: Pool GBEB – Revised
23.07.2021: Pool WBAI – Re-activated; Pool WBLT – No allocation
28.06.2021: Pool COTS – Revised; Pool GBRG – New
22.06.2021: Pool COTS – Revised
14.06.2021: Pool WBRT – Re-activated
11.06.2021: Pool DCRO – Revised; Pool EPUK – Revised; Pool HVAC – New
| POOL | BUSINESS SECTOR | NOTES | DATE |
| ACAC | Alstom, AC Locomotive Group, AC Electric Fleet, BH Cl.89 | Revised | 15.04.2016 |
| ACXX | Alstom, AC Locomotive Group, AC Stored Fleet, BH Cl.81, 82, 83, 84,& 85 | Revised | 16.07.2005 |
| ADFL | Advenza Freight Locos | No allocation | 29.01.2012 |
| ATLO | Alstom, Traincare Locos, LL/LO/OY/SV Cl.08 | Revised | 26.12.2018 |
| ATTB | Alstom, Dellner Coupler Fitted Thunderbirds, Cl.57 | No allocation | 12.05.2009 |
| ATZZ | Alstom, Locos for Disposal, LO/SV Cl.08 | Revised | 26.12.2018 |
| AWCA | West Coast Railway Company, Diesel Locomotives Fleet, CS/HQ/LM Cl.33, 37, 47, 57 & 86 | Revised | 05.10.2021 |
| AWCS | West Coast Railway Company, Steam Locomotives Fleet, CS/HQ Cl.98 | New | 03.01.2013 |
| AWCX | West Coast Railway Company, Stored Locomotives Fleet, CS Cl.08, 33, 37, 47 & 57 | New | 03.01.2013 |
| BDPL | Baby Deltic Project Locomotive, Cl.23 | No allocation | .. |
| BREL | Boden Rail Engineering Ltd, HQ Cl.50 | Revised | 02.07.2020 |
| CDJD | Central Services (Serco Railtest), DY Cl.08 | New | 20.03.1994 |
| CFOL | Class 50 Operations, KI Cl.37 & 50 | Revised | 02.03.2020 |
| CFSL | Class 40 Society Locomotives, HQ Cl.40 & 89 (Cl.40) | New | 27.01.2017 |
| COFS | Colas Rail Limited, Operational Locos, HQ Cl.37 & 50, RU Cl.56 | Revised | 02.07.2020 |
| COLO | Colas Rail Limited, Operational Locos, RU Cl.66/8 & HQ Cl.70 | Revised | 26.03.2015 |
| COLR | Colas Rail Limited, Network Rail Traffic, HQ Cl.70 | No allocation | .. |
| COLS | Colas Rail Limited, Stored Locos | No allocation | 23.02.2021 |
| COTS | Colas Rail Limited, BT/CD/HQ/RU Cl.37, HQ Cl.43 & RU Cl.67 | Revised | 28.06.2021 |
| CQOX | Central Services – Railtest Locos | No allocation | .. |
| CROL | Cotswold Rail – Various Locos | No allocation | 20.12.2014 |
| CSPC | Class 73 Preservation Company, Cl.73 | No allocation | 10.05.2013 |
| CTLO | Cambrian Trains, Operational Various Locos | No allocation | 06.05.2000 |
| CTLS | Cambrian Trains, Stored Locos | No allocation | .. |
| DBLX | Deltic Preservation Society, BH/CB/YK Cl.89 (Cl.55) | Revised | 09.06.2004 |
| DCRO | Devon and Cornwall Railways Limited (DCRail), HQ Cl.56 | Revised | 08.06.2021 |
| DCRS | Devon and Cornwall Railways Limited (DCRail), TO Cl.60 | New | 27.07.2020 |
| DDHH | Freightliner Heavy Haul Ltd, Cl.70 | No allocation | 25.08.2016 |
| DDHJ | Freightliner Heavy Haul Ltd, Limited Mileage, Cl.66 | No allocation | 26.08.2016 |
| DDHM | Freightliner Heavy Haul Ltd, Large Tanker, Cl.66 | No allocation | 25.08.2016 |
| DDHN | Freightliner Heavy Haul Ltd, Small Tanker, Cl.66 | No allocation | 25.08.2016 |
| DDHS | Freightliner Heavy Haul Ltd, 60MPH, Cl.66 | No allocation | 25.08.2016 |
| DDII | Freightliner Ltd, Intermodal, Cl.70 | No allocation | 25.08.2016 |
| DDIM | Freightliner Ltd, Intermodal, Large Tanker, Cl.66 | No allocation | 25.08.2016 |
| DDIN | Freightliner Ltd, Intermodal, Small Tanker, Cl.66 (Used for FD Cl.08) | Revised | 17.09.2019 |
| DEIC | Freightliner Ltd, Intermodal, Cl.86 | No allocation | 25.08.2016 |
| DEIS | Freightliner Ltd, Intermodal, Cl.90 | No allocation | 25.08.2016 |
| DFEP | Freightliner PL Sp (Poland), European, HQ Cl.66 | No allocation | 14.05.2018 |
| DFGH | Freightliner Heavy Haul Ltd, Crewe Cl.70 | No allocation | 05.11.2019 |
| DFGI | Freightliner Ltd, Intermodal, FD Cl.70 | Re-activated | 03.07.2020 |
| DFGM | Freightliner Ltd, Intermodal, Crewe Cl.66 | No allocation | 24.01.2014 |
| DFGP | Freightliner Heavy Haul Ltd, GPS Locos | No allocation | .. |
| DFHG | Freightliner Heavy Haul Ltd, MD Cl.59/0, Cl.59/1 & Cl.59/2 | Re-activated | 05.11.2019 |
| DFHH | Freightliner Heavy Haul Ltd, FD Cl.66/6 | Revised | 14.09.2017 |
| DFHJ | Freightliner Heavy Haul Ltd, FD Cl.66 | No allocation | 19.10.2018 |
| DFHT | Freightliner Heavy Haul Ltd, Stored Serviceable, Cl.47 | No allocation | .. |
| DFHZ | Freightliner Heavy Haul Ltd, Stored Re-power, Crewe Cl.47 | No allocation | 17.07.2002 |
| DFIM | Freightliner Ltd, Intermodal, Modified FD/LD Cl.66/5 | Re-activated | 25.08.2016 |
| DFIN | Freightliner Ltd, Intermodal, Low Emission,1299 Fuel Capacity FD/HQ Cl.66/4, 66/5 & 66/9 | Re-activated | 25.08.2016 |
| DFLC | Freightliner Ltd, Intermodal, FE Cl.90 | Re-activated | 25.08.2016 |
| DFLH | Freightliner Heavy Haul Ltd, FD Cl.47 | Re-activated | 31.07.2018 |
| DFLR | Freightliner Ltd, Resilience (NPU) Crewe Cl.47 | No allocation | 21.07.1997 |
| DFLS | Freightliner Ltd, T.B.A. Cl.08 | No allocation | 20.12.2016 |
| DFLT | Freightliner Ltd, Tinsley Cl.47/0 | No allocation | 16.04.2004 |
| DFMC | Freightliner Ltd, Intermodal, Crewe Cl.86/5 | No allocation | 30.06.2016 |
| DFML | Freightliner Heavy Haul Ltd, Cl.56 Shunt Locos | No allocation | 29.06.2015 |
| DFNC | Freightliner Ltd, Intermodal, FE Cl.86/6 | No allocation | 17.02.2021 |
| DFTZ | Freightliner Ltd, Twin Tank, Crewe Cl.57 | No allocation | 17.01.2014 |
| DFUL | Freightliner Ltd, Unservicable Locos | No allocation | 11.08.2019 |
| DHLT | Freightliner Ltd, Contingency Serviceable (Used for Polish Fleet and Stored Locos) | Revised | 19.09.2016 |
| DNLL | Deltic 9000 Locomotive Ltd, HQ Cl.50 | New | 09.10.1999 |
| DXXB | For Western Region Training Package | New | ??.??.?? |
| DXXC | For Crewe Training School | New | ??.??.?? |
| EFOO | First Greater Western Limited, PZ Cl.57/6 | Revised | 29.03.2018 |
| EFPC | First Greater Western Limited, HQ/LA Cl.43 | Revised | 18.02.2019 |
| EFSH | First Greater Western Limited, LA/LE/PM/RG Cl.08 | Revised | 06.03.2020 |
| EHPC | Arriva Cross Country, LA Cl.43/0 | Revised | 17.06.2020 |
| EJLO | West Midlands (West Midlands Trains Ltd), TS Cl.08 | New | 11.11.2007 |
| ELRD | East Lancashire Railway (Diesels) Various Locos, HQ Cl.89(Cl.55) | No allocation | 11.02.2018 |
| EMPC | Abellio East Midlands Limited, NL Cl.43 | Revised | 19.02.2021 |
| EMSL | Abellio East Midlands Limited (Shunting Locos), DY/NL Cl.08 | Revised | 18.08.2019 |
| EPEX | EuroPhoenix Locos – For Export, HQ Cl.86 & 91 | Revised | 23.10.2019 |
| EPUK | EuroPhoenix Locos – For UK, HQ/LR Cl.08, 37/0 & 37/9 | Revised | 09.06.2021 |
| EPXF | EuroPhoenix, Overhaul/Repairs, Cl.56 | No allocation | .. |
| EPXO | EuroPhoenix, Operational, Cl.56 | No allocation | .. |
| EPXS | EuroPhoenix, Stored Fleet, Cl.56 | No allocation | 15.11.2012 |
| EPXX | EuroPhoenix, Export Fleet, Cl.56 | No allocation | 21.03.2013 |
| EPXZ | EuroPhoenix, Withdrawn, Cl.56 | No allocation | .. |
| EROG | Rail Operations Group, Electric Locomotives, LR Cl.91 | New | 30.03.2020 |
| ERSL | Eastern Rail Services Limited Locomotives, HQ Cl.08 & 31/4 | New | 13.01.2021 |
| ETLO | Electric Traction, Operational Fleet, Cl.56 | No allocation | 23.02.2015 |
| ETLS | Electric Traction, Stored Fleet, Cl.56 | No allocation | 07.08.2013 |
| ETLX | Electric Traction, Withdrawn Locos, Cl.56 | No allocation | .. |
| FAMT | Private Owner – 37679, HQ Cl.37 | Revised | 16.09.2015 |
| GBBR | GB Railfreight, Brush Traction MTU Repowered, SE Cl.73/1 (Used for imported PG Cl.66/7) | Revised | 08.10.2021 |
| GBBT | GB Railfreight, JT42 Standard Cab, Big Fuel Tank, PG/RS Cl.66/7 | Revised | 20.12.2020 |
| GBCH | GB Railfreight, Cl.86 & 87 | No allocation | 30.10.2020 |
| GBCM | GB Railfreight, Commercial Locos, Cl.66 | No allocation | 27.05.2016 |
| GBCR | GB Railfreight, Allocated To Crossrail London, Cl.66 | No allocation | 01.07.2016 |
| GBCS | GB Railfreight, Caledonian Sleeper, EC Cl.73/9 | Revised | 25.10.2015 |
| GBCT | GB Railfreight, Channel Tunnel, WB Cl.92 | Re-activated | 19.06.2020 |
| GBDF | GB Railfreight, Cl.47 On Hire, PG Cl.47/7 | Re-activated | 21.12.2017 |
| GBDR | GB Railfreight, Ex-German Configuration, Cl.66 | No allocation | 04.03.2016 |
| GBEB | GB Railfreight, JT42 Euro Cab, Big Fuel Tank, PG/RS Cl.66/7 | Revised | 15.07.2021 |
| GBED | GB Railfreight, SE Cl.73/1 & 73/2 | Revised | 20.10.2014 |
| GBEE | GB Railfreight, Hired In DRS Cl.20 | No allocation | 30.10.2020 |
| GBEL | GB Railfreight, JT42 Euro Cab, Little Fuel Tank, PG Cl.66/7 | New | 04.03.2016 |
| GBET | GB Railfreight, Eurotunnel, HQ Cl.92 | No allocation | 01.07.2019 |
| GBFM | GB Railfreight, RETB, PG Cl.66/7 | New | 24.07.2011 |
| GBGD | GB Railfreight, Serviceable Cl.56 Fleet, LR/RS Cl.56 | Revised | 16.06.2019 |
| GBGS | GB Railfreight, Stored/Doner Cl.56 Fleet, PG Cl.56 & 69 | Revised | 09.02.2021 |
| GBHH | GB Railfreight, Heavy Haul, RS Cl.66/7 | New | 08.04.2021 |
| GBHL | GB Railfreight, Cl.66 Sub Hired To Other Operators, Cl.66 | No allocation | 07.07.2012 |
| GBLT | GB Railfreight, JT42 Standard Cab, Little Fuel Tank, PG Cl.66/7 | New | 08.02.2016 |
| GBMU | GB Railfreight, Multiple Units | No allocation | 30.12.2021 |
| GBNB | GB Railfreight, New Builds, PG Cl.66/7 | New | 29.07.2014 |
| GBNL | GB Railfreight, Netherlands Configuration, Cl.66 | No allocation | 04.03.2016 |
| GBNR | GB Railfreight, Network Rail, SE Cl.73/9 | New | 04.03.2015 |
| GBOB | GB Railfreight, Buckeye Fitted, Big Fuel Tanks, Original Series, RS Cl.66/0 | Revised | 04.01.2018 |
| GBRG | GB Railfreight, Re-powered Cl.56, PG Cl.69 | New | 28.06.2021 |
| GBRT | GB Railfreight, Restricted Use, PG 66/7 | Revised | 20.08.2018 |
| GBSD | GB Railfreight, Scottish Delivery (Used for Stored HQ Cl.92) | Revised | 08.10.2021 |
| GBSL | GB Railfreight, Scottish Sleepers, WB Cl.92 | Revised | 01.07.2019 |
| GBST | GB Railfreight, Sleepers and Channel Tunnel, WB Cl.92 | Revised | 01.07.2019 |
| GBTG | ‘GB Railfreight, Doncaster Roberts Road, RS Cl.60 | New | 20.08.2018 |
| GBWM | GB Railfreight, Whitemoor, PG Cl.08 & 09 | Revised | 26.12.2018 |
| GBXX | GB Railfreight, General, Cl.66 | No allocation | .. |
| GBYH | GB Railfreight Cl.59 Yeoman Highlander, ZG Cl.59/0 | New | 04.09.2014 |
| GBZZ | GB Railfreight, Stored Locos, SE Cl.73 | Re-activated | 08.10.2021 |
| GCHP | Grand Central, HT Cl.43/0 | No allocation | 10.01.2018 |
| GPMW | EPS (Eurostar (UK)), Match Wagons, HQ Cl.96/3 | New | 02.02.1998 |
| GPSG | EPS (Eurostar (UK)), Generator Vans, HQ Cl.96/3 | New | 11.11.1996 |
| GPSN | EPS (Eurostar (UK)), Ex-BR Locos, HQ Cl.73/1 | New | 18.09.1994 |
| GPSS | EPS (Eurostar (UK)), Depot Pilot North Pole International, HQ Cl.08 | New | 20.03.1994 |
| GROG | Rail Operations Group, LR Cl.37 & 57/3 | Revised | 29.03.2021 |
| HAPC | TOC – ScotRail, HST Power Cars, HA/HQ Cl.43/0 | Revised | 28.05.2021 |
| HBSH | TOC – NEEC (Wabtec), BN/NL Cl.08 | Revised | 26.12.2018 |
| HGYL | TOC – Hanson Traction Limited Locomotives, HQ Cl.31 | No allocation | 30.12.2021 |
| HHPC | Hanson & Hall, Rail Services Solutions Ltd, Power Cars, HQ Cl.43 | New | 22.04.2021 |
| HISE | TOC – Midland, DY Cl.08 | Revised | 28.02.1996 |
| HMGP | TOC – Heathrow Express, Cl.37 Locos on Hire | No allocation | .. |
| HNRL | TOC – Harry Needle Rail, BH/HQ/KM Cl.08, 09, 20, 31 & 47/7 | Revised | 10.06.2020 |
| HNRS | TOC – Harry Needle Rail, Stored Locos, BH/HQ Cl.07, 08, 09, 20, 37/7 & 47/7 | Revised | 12.01.2022 |
| HTLX | TOC – Hanson Traction Limited Locomotives, HQ Cl.31 & 56 | Revised | 27.07.2020 |
| HVAC | TOC – Hanson Traction Limited Locomotives, HQ Cl.50 | New | 08.06.2021 |
| HWSU | TOC – South Central (Southern), SU Cl.08 | No allocation | 28.07.2015 |
| HYWD | TOC – South Western Railway, WD Cl.73 | Revised | 20.08.2017 |
| IANA | InterCity – Anglia, (Abellio Greater Anglia Ltd), NC Cl.90 | No allocation | 08.07.2020 |
| IBRA | InterCity – Bristol Cl.47 | No allocation | 27.03.1994 |
| ICCE | InterCity – Cross Country HST, EC Cl.43 | No allocation | .. |
| ICHP | Private Owner – 125 Group, Power Cars, HQ Cl.43 | Re-activated | 14.09.2020 |
| ICHS | InterCity – Charter, Steam Locos | No allocation | .. |
| IEBA | InterCity – Euston-Birmingham-Wolverhampton Services, WN Cl.86/2 & 90 | No allocation | 08.12.1990 |
| IECA | InterCity – ECML, (London North Eastern Railway Limited), NL Cl.91 | Revised | 16.02.2021 |
| IECP | InterCity – ECML, (London North Eastern Railway Limited), EC Cl.43 | Revised | 23.10.2020 |
| IERA | InterCity – Expanded Fuel Tanks, Crewe Cl.47/4 | No allocation | 10.05.1992 |
| IGJA | InterCity – GWML Weekend Hire, BR Cl.37 | No allocation | 22.10.1993 |
| IGJK | InterCity – Bristol, South West & West, CF Cl.97 | No allocation | 05.04.2004 |
| IVGA | InterCity – Gatwick Express, SL Cl.73/2 | No allocation | 29.01.2012 |
| IWBR | InterCity – GW Long Range, BR Cl.47 | No allocation | 02.10.1996 |
| IWCP | InterCity – Holyhead (WR HST’s), LA Cl.43 | No allocation | 03.01.2003 |
| IWCW | InterCity – WCML HST, LA Cl.43 | No allocation | .. |
| KDSD | BRML Level 5 (Bombardier), ZF Cl.08 | New | 20.03.1994 |
| KRSL | Knights Rail Services Various Locos | No allocation | .. |
| LSLO | Locomotive Services Ltd, Operational Fleet, CD/CS/HQ Cl.08, 20, 37, 40, 47, 57, 86, 87, 90 & 98 | Revised | 13.01.2022 |
| LSLS | Locomotive Services Ltd, Stored Fleet, CD/HQ/WI Cl.08, 45, 47, 89/5 & 98 | Revised | 05.03.2020 |
| MBDL | RES – Special Trains Charter, Private Owner Diesel Locos | New | 01.04.1993 |
| MBED | RES – Special Trains Charter, Private Owner Electro-diesel Locos, HQ/SL Cl.73 | Revised | 29.01.2012 |
| MBEL | RES – Special Trains Charter, Private Owner Electric Locos | New | 18.07.2015 |
| MBSL | RES – Special Trains Charter, Private Owner Steam Locos | New | 01.04.1993 |
| MNXY | Mid Norfolk Railway, Multiple Units | No allocation | .. |
| MNXZ | Mid Norfolk Railway, Locomotives | New | 18.10.2021 |
| MOLO | Michael Owen, RT Rail, Operational Fleet, Private Owner Diesel, DY Cl.08, BH/HQ/SE Cl.20 | Revised | 27.03.2015 |
| MRLO | Mainline Rail, Operational Fleet, Private Owner Diesel, BH Cl.31 (Only One Scrapped Loco) | Revised | 13.07.2007 |
| MRLS | Mainline Rail, Stored Fleet, Private Owner Diesel, BH Cl.31 (Only One Scrapped Loco) | Revised | 10.07.2018 |
| MRSO | Mainline Rail, Shunters Operational, Private Owner Diesel, HQ Cl.08 (Only One Scrapped Loco) | New | 08.11.2007 |
| MRSS | Mainline Rail, Shunters Stored, Private Owner Diesel Locos | No allocation | 11.11.2012 |
| MXXX | RES, Privately Owned Locos, Not Passed For Running By Network Rail | No allocation | 04.02.2005 |
| NRHL | Nemesis Rail, Hired Locomotives | No allocation | 15.05.2013 |
| NRLO | Nemesis Rail, Operational Fleet, BH Cl.33; BO Cl.31, 45, 47 & 73 | Revised | 14.10.2014 |
| NRLS | Nemesis Rail, Stored Fleet, BH Cl.31; BO Cl.33, 37 & 47 | Revised | 14.10.2014 |
| PTXX | Europorte2, HQ Cl.21/9 | Revised | 18.12.2014 |
| QACL | Network Rail, AC Load Bank, HQ Cl.86/9 (Only One Scrapped Loco) | Revised | 16.12.2004 |
| QADD | Network Rail, DF/HQ/ZA Cl.08, 31 & 73 | Revised | 29.01.2017 |
| QAED | Network Rail, Cl.73 | No allocation | 28.06.2009 |
| QCAR | Network Rail, HST Power Cars, ZA Cl.43 | Revised | 18.02.2019 |
| QETS | Network Rail, ERTMS, HQ Cl.97/3 | Revised | 25.02.2008 |
| QSTR | Network Rail, Stored Fleet | No allocation | 18.05.2010 |
| RAJV | SRPS, Private Owner Diesel Fleet, BT Cl.20, 25, 26, 27, 37 & 47; KM Cl.37 | Revised | 03.08.2020 |
| RCJZ | Fastline, Stored Fleet | No allocation | 30.10.2011 |
| RCLO | Rail Charter Services, Operational Locos | No allocation | 06.01.2001 |
| RCLS | Rail Charter Services, Stored Locos | No allocation | 19.11.1999 |
| RCZH | Rail Care UK (Gemini Rail Services UK Ltd), Springburn, ZH Cl.08 | Revised | 09.11.2018 |
| RCZN | Rail Charter (Gemini Rail Services UK Ltd), Wolverton, ZN Cl.08 | Revised | 09.11.2018 |
| RFSH | RFS(E) (Wabtec), BN/EC/HQ Cl.08 | Revised | 23.03.2013 |
| RMSX | Rail Management Services Locotec, HQ Cl.08 | New | 28.09.2012 |
| RNRG | Western Track Renewal – Reading Cl.08 | No allocation | 05.04.2004 |
| RTLO | Riviera Trains Limited, Operational Fleet | No allocation | 07.07.2016 |
| RTSO | Riviera Trains Limited, Shunters Operational, CD/HQ Cl.08 | Revised | 26.11.2016 |
| RVLO | Rail Vehicle Engineering (Loram UK Ltd), Operational Fleet, DF Cl.31 | New | 22.01.2007 |
| RVLS | Rail Vehicle Engineering (Loram UK Ltd), Stored Locos | No allocation | 08.09.2009 |
| SAXL | Eversholt Leasing, Stored Spare Locos | Re-activated | 16.10.2019 |
| SBXL | Porterbrook Leasing, Stored Spare Locos | Re-activated | 13.03.2019 |
| SCEL | Angel Leasing, Locos Stored At Ely | New | 13.03.2019 |
| SCXL | Angel Leasing, Stored Spare Locos | No allocation | 28.05.2021 |
| SDAC | Fragonset Railways, AC Locos | No allocation | 18.02.2007 |
| SDED | Fragonset Railways, ED Locos | No allocation | 18.02.2007 |
| SDFL | Fragonset Railways, Freight, Cl.47 | No allocation | 26.02.2007 |
| SDFR | Fragonset Railways, Cl.47 | No allocation | 06.03.2007 |
| SDMS | Fragonset Railways, Charter, Cl.45 | No allocation | 26.02.2007 |
| SDPP | Fragonset Railways, Charter – Push Pull, Cl.31 | No allocation | 26.02.2007 |
| SDXL | Fragonset Railways, Stored Fleet, Cl.47 | No allocation | 11.11.2012 |
| SRAC | Swift Rail, AC Locos, Cl.86 | No allocation | .. |
| SROG | Rail Operations Group – Locos Under Overhaul, LR Cl.47/8 | Revised | 30.01.2020 |
| TPCF | First TransPennine Express Limited, Various Locos, LO Cl.68 (CAF Mk 5A Five-carriage Set Testing) | No allocation | 11.02.2021 |
| TPEX | First TransPennine Express Limited, Various Locos, LO Cl.68 | New | 01.04.2019 |
| TTLS | Traditional Traction Ltd, WA Cl.08, 20 & 47/4 | Revised | 17.09.2007 |
| TTTC | Type Three Traction Company, CS Cl.37 | New | 14.04.2000 |
| UKRL | UK Rail Leasing – Active Fleet On Hire, LR Cl.56 | Revised | 22.10.2015 |
| UKRM | UK Rail Leasing – Operational Locos But Not For Mainline Usage, HQ Cl.33 & LR Cl.37/9 | New | 27.10.2015 |
| UKRO | UK Rail Leasing – Locos In Course Of Being Overhauled | No allocation | 27.10.2015 |
| UKRS | UK Rail Leasing – Stored Fleet, HQ Cl.27 & 58, LR Cl.56 | Revised | 05.11.2015 |
| WAAC | DB Cargo UK – Regular Fleet, CE Cl.67 | New | 31.12.2013 |
| WABC | DB Cargo UK – RETB Fitted, CE Cl.67 | Re-activated | 15.03.2021 |
| WACC | DB Cargo UK – Chiltern Hire, CE Cl.67 | No allocation | 04.11.2020 |
| WAWC | DB Cargo UK – Gweithrediadau Keolis Amey Limited Hire, CE Cl.67 | Re-activated | 04.11.2020 |
| WBAE | DB Cargo UK – Auto Stop Start, Standard, TO Cl.66 | New | 08.05.2015 |
| WBAI | DB Cargo UK – Industrial, Standard, TO Cl.66 | Revised | 07.01.2022 |
| WBAK | DB Cargo UK – Construction, Standard, Cl.66 | No allocation | 08.05.2015 |
| WBAR | DB Cargo UK – Remote Monitoring Equipment, TO Cl.66 | New | 09.09.2016 |
| WBAT | DB Cargo UK – Regular Fleet, TO Cl.66 | New | 31.12.2013 |
| WBBE | DB Cargo UK – Auto Stop Start, RETB, TO Cl.66 | New | 08.05.2015 |
| WBBK | DB Cargo UK – Construction, RETB, Cl.66 | No allocation | 08.05.2015 |
| WBBT | DB Cargo UK – RETB Fitted, TO Cl.66 | Re-activated | 05.07.2019 |
| WBLE | DB Cargo UK – Auto Stop Start, Lickey Coupling Equipped, TO Cl.66 | New | 08.05.2015 |
| WBLT | DB Cargo UK – Lickey Coupling Modified, Cl.66 | No allocation | 23.07.2021 |
| WBRT | DB Cargo UK – RHTT Fleet, TO Cl.66 | Re-activated | 14.06.2021 |
| WBSK | DB Cargo UK – Network, Sandite/RHTT Fleet, Cl.66 | No allocation | .. |
| WBSN | DB Cargo UK – Construction, Sandite/RHTT Fleet, Cl.66 | No allocation | 05.10.2015 |
| WBST | DB Cargo UK – Network, Sandite – Trip Cock Fitted, Cl.66 | No allocation | 25.09.2014 |
| WBTT | DB Cargo UK – RHTT Fleet – Trip Cock Fitted, Cl.66 | No allocation | 27.12.2017 |
| WCAT | DB Cargo UK – Normal Fuel Capacity, TO Cl.60 | New | 31.12.2013 |
| WCBT | DB Cargo UK – Extra Fuel Capacity, TO Cl.60 | New | 31.12.2013 |
| WDAM | DB Cargo UK – TO Cl.59/2 | No allocation | 04.11.2019 |
| WEAC | DB Cargo UK – Regular Fleet, CE Cl.90 | Re-activated | 16.09.2019 |
| WEDC | DB Cargo UK – DRS Hire, CE Cl.90 | Re-activated | 28.07.2017 |
| WFAC | DB Cargo UK – Regular Fleet, Cl.92 | No allocation | 28.09.2015 |
| WFBC | DB Cargo UK – HS1, CE Cl.92 | New | 31.12.2013 |
| WFMS | DB Cargo UK – Holding Pool Pending Sandite Use | No allocation | 26.03.2021 |
| WGEA | DB Cargo France, AZ/TO Cl.66 | New | 22.12.2013 |
| WGEE | DB Cargo (Eastern Europe), CE/HQ Cl.92 | Revised | 29.04.2015 |
| WGEP | DB Cargo Poland, PN Cl.66 | New | 22.12.2013 |
| WKAM | DB Cargo UK – Non ETH Fitted, Cl.37 | No allocation | 07.04.2003 |
| WNQX | DB Cargo UK – Quarantined Locos HQ All Classes | No allocation | .. |
| WNXX | DB Cargo UK – Stored Unserviceable – Mainline Locos HQ All Classes | No allocation | 18.02.2016 |
| WQAA | DB Cargo UK – Stored Group 1A, All Classes | New | 22.12.2013 |
| WQAB | DB Cargo UK – Stored Group 1B, All Classes | Re-activated | 29.07.2016 |
| WQBA | DB Cargo UK – Stored Group 2, All Classes | New | 29.12.2013 |
| WQCA | DB Cargo UK – Stored Group 3, All Classes | New | 29.12.2013 |
| WQDA | DB Cargo UK – Stored Group 4, All Classes (Locos Stored Surplus) | Re-activated | 15.09.2021 |
| WSAS | DB Cargo UK – Anglia & Southern Shunters, OC Cl.08 | No allocation | 05.04.2004 |
| WSGC | DB Cargo UK – GSMR Fitted, Cl.08 | No allocation | 29.12.2016 |
| WSMD | DB Cargo UK – Midlands Shunters, TO Cl.08 | No allocation | 05.04.2004 |
| WSNW | DB Cargo UK – North West Shunters, CD Cl.08 & 09 | No allocation | 05.04.2004 |
| WSRC | DB Cargo UK – Remote Control Fitted, Cl.08 | No allocation | 16.12.2016 |
| WSSC | DB Cargo UK – Unmodified, Cl.08 & 09 | No allocation | 29.12.2016 |
| WSSW | DB Cargo UK – Scotland & Borders, ML Cl.08 & 09 | No allocation | 16.03.2001 |
| XDLA | Private Owner – Preserved Diesel Locos | No allocation | ??.??.?? |
| XELA | Private Owner – Preserved Electric Locos | No allocation | .. |
| XHAC | Private Owner – Direct Rail Services, HQ/KM Cl.37/4, KM Cl.57/3 | Revised | 03.02.2020 |
| XHCC | Private Owner – Direct Rail Services, Cumbrian Coast, HQ/KM Cl.37/4 | No allocation | 15.01.2019 |
| XHCE | Private Owner – Direct Rail Services, Hired To Chiltern Railways, KM Cl.68 | New | 03.10.2014 |
| XHCK | Private Owner – Direct Rail Services, KM Cl.57/0 | Revised | 30.07.2020 |
| XHCS | Private Owner – Direct Rail Services, Chiltern Railways Spare Locos, KM Cl.68 | New | 04.02.2021 |
| XHHP | Private Owner – Direct Rail Services, De-registered Various Locos | Re-activated | 31.01.2020 |
| XHIM | Private Owner – Direct Rail Services, Intermodal, TO Cl.66/0 & KM Cl.66/3 & 66/4 | Revised | 10.10.2019 |
| XHMW | Private Owner – Direct Rail Services, Locos in Main Works | No allocation | 13.03.2007 |
| XHNB | Private Owner – Direct Rail Services, Northern Belle Charters, Cl.47 | No allocation | 13.07.2015 |
| XHNC | Private Owner – Direct Rail Services, Nuclear, KM Cl.37 & 68 | Revised | 13.12.2021 |
| XHND | Private Owner – Direct Rail Services, Infrastructure Monitoring, Crewe Cl.37 | No allocation | 22.04.2013 |
| XHSS | Private Owner – Direct Rail Services, Stored Fleet, KM Cl.37 & 57 | Revised | 28.10.2020 |
| XHTP | Private Owner – Direct Rail Services, Leased To First TransPennine Express, KM Cl.68 | Re-activated | 02.02.2021 |
| XHUS | Private Owner – Direct Rail Services, Unserviceable Various Locos | No allocation | .. |
| XHVE | Private Owner – Direct Rail Services, Vossioh UK Light Locos, KM Cl.68 & 88 | Revised | 29.07.2014 |
| XHVT | Private Owner – Direct Rail Services, Thunderbird VT Rescue Locos, KM Cl.57/3 | New | 28.04.2014 |
| XSDP | Private Owner – Direct Rail Services, Locos Stored Pending Disposal, KM Cl.20, 37 & 57 | New | 23.02.2021 |
| XYPA | Private Owner – Mendip Rail – ARC (Hanson Aggregates), WH Cl.59/1 | No allocation | 05.11.2019 |
| XYPO | Private Owner – Mendip Rail – Foster Yeoman (Aggregate Industries), MD Cl.59/0 | No allocation | 05.11.2019 |