| District | Code | |
|---|---|---|
| Central | A | View |
| East | B | View |
| C | View | |
| Liverpool | D | View |
| London East | E | View |
| London North | F | View |
| London South | G | View |
| London West | H | View |
| Manchester | J | View |
| Midland | K | View |
| North | L | View |
| North East | M | View |
| South East Midlands | N | View |
| North Midlands | O | View |
| South | P | View |
| South East | Q | View |
| South Wales | R | View |
| South West | S | View |
| Teesside | T | View |
| West | U | View |
| Yorkshire | V | View |
| Scotland | W | View |
| National | Y | View |