| E-NE | North East (England) |
| E-NW | North West (England) |
| E-YH | Yorkshire and Humber (England) |
| E-EE | East of England |
| E-EM | East Midlands (England) |
| E-WM | West Midlands (England) |
| E-SW | South West (England) |
| E-SE | South East (England) |
| E-LN | London (England) |
| I-CO | Connacht (Ireland) |
| I-UL | Ulster (Ireland) |
| I-MU | Munster (Ireland) |
| I-LE | Leinster (Ireland) |
| S-AY | Ayrshire (Scotland) |
| S-BO | Borders (Scotland) |
| S-CS | Central Scotland (Scotland) |
| S-DG | Dumfries and Galloway (Scotland) |
| S-DU | Dunbartonshire (Scotland) |
| S-AB | Argyll and Bute (Scotland) |
| S-FI | Fife (Scotland) |
| S-GR | Grampian (Scotland) |
| S-GL | Glasgow (Scotland) |
| S-HW | Highlands and Western Isles (Scotland) |
| S-LA | Lanarkshire (Scotland) |
| S-LO | Lothian (Scotland) |
| S-OS | Orkney and Shetland (Scotland) |
| S-RE | Renfrewshire (Scotland) |
| S-TA | Tayside (Scotland) |
| W-BG | Blaenau Gwent (Wales) |
| W-BR | Bridgend/Pen-y-bont ar Ogwr (Wales) |
| W-CF | Caerphilly/Caerffili (Wales) |
| W-CD | Cardiff/Caerdydd (Wales) |
| W-GA | Carmarthenshire/Sir Gaerfyrddin (Wales) |
| W-CE | Ceredigion (Wales) |
| W-CO | Conwy (Wales) |
| W-DB | Denbighshire/Sir Ddinbych (Wales) |
| W-FL | Flintshire/Sir y Fflint (Wales) |
| W-GW | Gwynedd (Wales) |
| W-YM | Isle of Anglesey/Ynys Môn (Wales) |
| W-MT | Merthyr Tydfil/Merthyr Tudful (Wales) |
| W-SF | Monmouthshire/Sir Fynwy (Wales) |
| W-PT | Neath Port Talbot/Castell-nedd Port Talbot (Wales) |
| W-NP | Newport/Casnewydd (Wales) |
| W-PB | Pembrokeshire/Sir Benfro (Wales) |
| W-PO | Powys (Wales) |
| W-RC | Rhondda Cynon Taf (Wales) |
| W-SW | Swansea/Abertawe (Wales) |
| W-TF | Torfaen/Tor-faen (Wales) |
| W-GL | Vale of Glamorgan/Bro Morgannwg (Wales) |
| W-WX | Wrexham/Wrecsam (Wales) |
| C--- | pan-British/Irish |
| E--- | England |
| I--- | Ireland |
| S--- | Scotland |
| W--- | Wales |