| BeNCH | Bedfordshire, Northamptonshire, Cambridgeshire, Hertfordshire |
| BGSW | Bristol, Gloucestershire, Somerset & Wiltshire |
| CGM | Cheshire & Greater Manchester |
| CL | Cumbria & Lancashire |
| DDC | Dorset, Devon & Cornwall |
| DLNR | Derbyshire, Leicestershire, Nottinghamshire & Rutland |
| DTV | Durham, Tees Valley |
| Essex | Essex |
| Hampshire | Hampshire & Isle of Wight |
| HLNY | Humberside, Lincolnshire & North Yorkshire |
| KSS | Kent, Surrey & Sussex |
| London | London |
| Merseyside | Merseyside |
| NS | Norfolk & Suffolk |
| Northumbria | Northumbria |
| SWM | Staffordshire & West Midlands |
| SY | South Yorkshire |
| Thames Valley | Berkshire, Oxfordshire & Buckinghamshire |
| Wales | Wales |
| WWM | Warwickshire & West Mercia |
| WY | West Yorkshire |