ISO 3166-2 subcodes.
| BKM | Buckinghamshire |
| CAM | Cambridgeshire |
| CMA | Cumbria |
| DBY | Derbyshire |
| DEV | Devon |
| DOR | Dorset |
| ESX | East Sussex |
| ESS | Essex |
| GLS | Gloucestershire |
| HAM | Hampshire |
| HRT | Hertfordshire |
| KEN | Kent |
| LAN | Lancashire |
| LEC | Leicestershire |
| LIN | Lincolnshire |
| NFK | Norfolk |
| NYK | North Yorkshire |
| NTH | Northamptonshire |
| NTT | Nottinghamshire |
| OXF | Oxfordshire |
| SOM | Somerset |
| STS | Staffordshire |
| SFK | Suffolk |
| SRY | Surrey |
| WAR | Warwickshire |
| WSX | West Sussex |
| WOR | Worcestershire |
