Central
| B | Birmingham | Central |
| CV | Coventry | Central |
| GL | Gloucester | Central |
| MK | Milton Keynes | Central |
| NN | Northampton | Central |
| OX | Oxford | Central |
| RG | Reading | Central |
| SN | Swindon | Central |
| WR | Worcester | Central |
EAST
| IG | Ilford | East |
| CB | Cambridge | East |
| CO | Colchester | East |
| IP | Ipswich | East |
| NR | Norwich | East |
| SS | Southend | East |
EAST MIDLANDS
| DE | Derby | East Midlands |
| DN | Doncaster | East Midlands |
| LE | Leicester | East Midlands |
| LN | Lincoln | East Midlands |
| NG | Nottingham | East Midlands |
| PE | Peterborough | East Midlands |
| S | Sheffield | East Midlands |
EXTERNAL
| QC | Awarding Bodies | External |
| BT | Belfast | External |
| GY | Guernsey | External |
| IM | Isle of Man | External |
| JE | Jersey | External |
| non UKPostcode conforming | Non UK | External |
NORTH
| BB | Blackburn | North |
| FY | Blackpool | North |
| BL | Bolton | North |
| BD | Bradford | North |
| CA | Carlisle | North |
| TS | Cleveland | North |
| DL | Darlington | North |
| DH | Durham | North |
| HX | Halifax | North |
| HG | Harrogate | North |
| HD | Huddersfield | North |
| HU | Hull | North |
| LA | Lancaster | North |
| LS | Leeds | North |
| L | Liverpool | North |
| M | Manchester | North |
| NE | Newcastle | North |
| OL | Oldham | North |
| PR | Preston | North |
| SK | Stockport | North |
| SR | Sunderland | North |
| WF | Wakefield | North |
| WA | Warrington | North |
| WN | Wigan | North |
| YO | York | North |
SCOTLAND
| AB | Aberdeen | Scotland |
| HS | Comhairle nan Eilean Siar | Scotland |
| DG | Dumfries | Scotland |
| DD | Dundee | Scotland |
| EH | Edinburgh | Scotland |
| FK | Falkirk | Scotland |
| TD | Galashiels | Scotland |
| G | Glasgow | Scotland |
| IV | Inverness | Scotland |
| KA | Kilmarnock | Scotland |
| KY | Kirkaldy | Scotland |
| KW | Kirkwall | Scotland |
| ML | Motherwell | Scotland |
| PA | Paisley | Scotland |
| PH | Perth | Scotland |
| ZE | Shetland | Scotland |
SOUTH EAST
| LU | Luton | South East |
| NW | London | South East |
| W | London | South East |
| WC | London | South East |
| SL | Slough | South East |
| UB | Southall | South East |
| WD | Watford | South East |
| EN | Enfield | South East |
| HP | Hemel | South East |
| E | London | South East |
| EC | London | South East |
| N | London | South East |
| RM | Romford | South East |
| BN | Brighton | South East |
| CT | Canterbury | South East |
| CR | Croydon | South East |
| GU | Guilford | South East |
| SE | London | South East |
| ME | Medway | South East |
| PO | Portsmouth | South East |
| RH | Redhill | South East |
| SO | Southampton | South East |
| TN | Tonbridge | South East |
| KT | Kingston | South East |
| SW | London | South East |
| SM | Sutton | South East |
| TW | Twickenham | South East |
| HA | Harrow | South East |
| BR | Bromley | South East |
| DA | Dartford | South East |
| CM | Chelmsford | South East |
| AL | St. Albans | South East |
| SG | Stevenage | South East |
SOUTH WEST
| BA | Bath | South West |
| BH | Bournemouth | South West |
| BS | Bristol | South West |
| DT | Dorchester | South West |
| EX | Exeter | South West |
| PL | Plymouth | South West |
| SP | Salisbury | South West |
| TA | Taunton | South West |
| TQ | Torquay | South West |
| TR | Truro | South West |
WALES & WEST MIDLANDS
| CF | Cardiff | Wales and West Midlands |
| CH | Chester | Wales and West Midlands |
| CW | Crewe | Wales and West Midlands |
| DY | Dudley | Wales and West Midlands |
| HR | Hereford | Wales and West Midlands |
| LD | Llandrindod | Wales and West Midlands |
| LL | Llandudno | Wales and West Midlands |
| NP | Newport | Wales and West Midlands |
| SY | Shrewsbury | Wales and West Midlands |
| ST | Stoke on Trent | Wales and West Midlands |
| SA | Swansea | Wales and West Midlands |
| TF | Telford | Wales and West Midlands |
| WS | Walsall | Wales and West Midlands |
| WV | Wolverhampton | Wales and West Midlands |
