| County | Code | County | Code | |
|---|---|---|---|---|
| Alderney | ALD | Humberside | HBS | |
| Avon | AVN | Isle of Man | IOM | |
| Bedfordshire | BFD | Isle of Wight | IOW | |
| Berkshire | BRK | Isles of Scilly | IOS | |
| Borders | BDS | Jersey | JER | |
| Buckinghamshire | BKS | Kent | KNT | |
| Cambridgeshire | CBE | Lancashire | LNH | |
| Central Scotland | CTR | Leicestershire | LEC | |
| Cheshire | CHS | Lincolnshire | LCN | |
| Cleveland | CVE | Lothian | LTH | |
| Clwyd | CWD | Merseyside | MSY | |
| Cornwall | CNL | Mid Glamorgan | GNM | |
| County Antrim | ATM | Norfolk | NOR | |
| County Armagh | ARM | North Yorkshire | YSN | |
| County Down | DWN | Northamptonshire | NHM | |
| County Fermanagh | FMH | Northumberland | NLD | |
| County Londonderry | LDR | Nottinghamshire | NOT | |
| County Tyrone | TYR | Orkney isles | OKE | |
| Cumbria | CBA | Oxfordshire | OFE | |
| Derbyshire | DYS | Powys | PWS | |
| Devon | DVN | Sark | SRK | |
| Dorset | DOR | Shetland Isles | SLD | |
| Dumfries & Galloway | DGL | Shropshire | SPE | |
| Durham | DHM | Somerset | SOM | |
| Dyfed | DFD | South Glamorgan | GNS | |
| East Sussex | SXE | South Yorkshire | YSS | |
| Eire | IRL | Staffordshire | SFD | |
| Essex | ESX | Strathclyde | SCD | |
| Fife | FFE | Suffolk | SFK | |
| Gloucestershire | GLR | Surrey | SRY | |
| Grampian | GRN | Tayside | TYS | |
| Greater London | LDN | Tyne & Wear | TWR | |
| Greater Manchester | MCH | Warwickshire | WKS | |
| Guernsey | GUR | West Glamorgan | GNW | |
| Gwent | GWT | West Midlands | WMD | |
| Gwynedd | GDD | West Sussex | SXW | |
| Hampshire | HPH | West Yorkshire | YSW | |
| Hereford & Worcester | HWR | Western Isles | WIL | |
| Hertfordshire | HFD | Wiltshire | WLT | |
| Highland | HLD |
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