| B | Lancashire |
| BA | Manchester (Salford until 1974) |
| BB | Newcastle upon Tyne |
| BC | Leicester |
| BD | Northampton |
| BE | Lincoln (Grimsby until 1981) |
| BF | Stoke-on-Trent |
| BG | Liverpool (Birkenhead until 1974) |
| BH | Luton (Buckinghamshire until 1974) |
| BJ | Ipswich (East Suffolk until 1974) |
| BK | Portsmouth |
| BL | Reading |
| BM | Luton |
| BN | Manchester (Bolton until 1981) |
| BO | Cardiff |
| BP | Portsmouth |
| BR | Newcastle upon Tyne (Durham until 1981) |
| BS | Aberdeen (Orkney until 1980) |
| BT | Leeds (Yorkshire (East Riding) until 1974; York until 1981) |
| BU | Manchester (Oldham until 1974) |
| BV | Preston (Blackburn until 1974) |
| BW | Oxford |
| BX | Haverfordwest |
| BY | Croydon (changed to London (North-West) on closure from 1967) |