| G | Glasgow |
| GA | Glasgow |
| GB | Glasgow |
| GC | London (South-West) |
| GD | Glasgow |
| GE | Glasgow |
| GF | London (South-West) |
| GG | Glasgow |
| GH | London (South-West) |
| GJ | London (South-West) |
| GK | London (South-West) |
| GL | Truro (Bath until 1974) |
| GM | Reading (Motherwell and Wishaw until 1974) |
| GN | London (South-West) |
| GO | London (South-West) |
| GP | London (South-West) |
| GR | Newcastle upon Tyne (Durham until 1981) |
| GS | Luton (Perthshire until 1974) |
| GT | London (South-West) |
| GU | London (South-East) |
| GV | Ipswich (West Suffolk until 1974) |
| GW | London (South-East) |
| GX | London (South-East) |
| GY | London (South-East) |