| A | London |
| AA | Bournemouth (Salisbury until 1980) |
| AB | Worcester |
| AC | Coventry |
| AD | Gloucester |
| AE | Bristol |
| AF | Truro |
| AG | Hull (Ayrshire until 1974) |
| AH | Norwich |
| AJ | Middlesbrough (Yorkshire (North Riding) until 1974) |
| AK | Sheffield (Bradford until 1974) |
| AL | Nottingham |
| AM | Swindon |
| AN | West Ham (changed to London from 1967) then again to Reading in 1974. (MAN used only in Isle of Man) |
| AO | Carlisle |
| AP | Brighton |
| AR | Chelmsford (Hertfordshire until 1974) |
| AS | Inverness |
| AT | Hull |
| AU | Nottingham |
| AV | Peterborough (Aberdeenshire until 1974) |
| AW | Shrewsbury |
| AX | Cardiff (Monmouthshire until 1974) |
| AY | Leicester |