The London & North Eastern Railway gave its depots a code usually consisting of three letters based on the depot name, though a couple of depots had two-character codes.
| Code | Depot name |
|---|---|
| ABD | Aberdeen Ferryhill |
| ALN | Alnmouth |
| ALS | Alston |
| ANN | Annesley |
| ARD | Ardsley |
| BRN | Barnsley |
| BGT | Bathgate |
| BLA | Blaydon |
| BOR | Borough Gardens |
| BOS | Boston |
| BFD | Bradford |
| BRI | Bridlington |
| BSE | Bury St Edmunds |
| CAM | Cambridge |
| CAR | Carlisle Canal |
| COL | Colchester |
| CLK | Colwick |
| CON | Consett |
| CUD | Cudworth |
| DAR | Darlington |
| DON | Doncaster |
| DEE | Dundee (Tay Bridge) |
| DFU | Dunfermline |
| DUR | Durham |
| EFD | Eastfield |
| FW | Fort William |
| FRO | Frodingham |
| GHD | Gateshead |
| GOR | Gorton |
| GRA | Grantham |
| HAT | Hatfield |
| HAV | Haverton Hill |
| HAW | Hawick |
| HAY | Haymarket |
| HTN | Heaton |
| HIT | Hitchin |
| HSY | Hornsey |
| HLB | Hull Botanic Gardens |
| HLD | Hull Dairycoates |
| HLS | Hull Springhead |
| IMM | Immingham |
| IPS | Ipswich |
| KEI | Keith |
| KL | King's Lynn |
| KX | Kings Cross |
| KBY | Kirkby Stephen |
| KIT | Kittybrewster |
| LNG | Langwith |
| NEV | Leeds Neville Hill |
| LEI | Leicester |
| LIN | Lincoln |
| LTH | Louth |
| LOW | Lowestoft |
| MAL | Malton |
| MAR | March |
| MC | Melton Constable |
| MEX | Mexborough |
| MID | Middlesborough |
| MIT | Midleton-In-Teesdale |
| NEA | Neasden |
| NWE | New England |
| NPT | Newport (Yorkshire) |
| NBH | North Blyth |
| NLN | Northallerton |
| NOR | Norwich |
| PKS | Parkeston |
| PKD | Parkhead |
| PAT | Patley Bridge |
| PBE | Peterborough East |
| PEL | Pelton Level |
| PMN | Percy Main |
| PTH | Perth |
| PKG | Pickering |
| POL | Polmont |
| RMH | Reedsmouth |
| RET | Retford |
| RBY | Rothbury |
| STM | St Margarets |
| SAL | Saltburn |
| SCA | Scarborough |
| SEL | Selby |
| SHF | Sheffield |
| SBH | South Blyth |
| SL | South Lynn |
| SBK | Starbeck |
| STV | Staveley |
| STG | Stirling (Shore Road) |
| STP | Stockport |
| SKN | Stockton |
| STR | Stratford |
| SUN | Sunderland |
| THJ | Thornton |
| TFD | Trafford Park |
| TUX | Tuxford |
| TWD | Tweedmouth |
| TDK | Tyne Dock |
| WAL | Walton-On-The-Hill |
| AUK | West Auckland/Bishop Auckland |
| WHL | West Hartlepool |
| WBY | Whitby |
| WIG | Wigan (Lower Ince) |
| WFD | Woodford Halse |
| WRX | Wrexham |
| YAR | Yarmouth (South Town) |
| YB | Yarmouth Beach |
| YK | York |