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| level1 | level2 | level3 | name |
|---|---|---|---|
| GB | GB-ENG | GB-STE | Stoke-on-Trent (City of) |
| GB | GB-ENG | GB-SFK | Suffolk |
| GB | GB-ENG | GB-SND | Sunderland (City of) |
| GB | GB-ENG | GB-SRY | Surrey |
| GB | GB-ENG | GB-STN | Sutton |
| GB | GB-ENG | GB-SWD | Swindon |
| GB | GB-ENG | GB-TAM | Tameside |
| GB | GB-ENG | GB-TFW | Telford and Wrekin |
| GB | GB-ENG | GB-THR | Thurrock |
| GB | GB-ENG | GB-TOB | Torbay |
| GB | GB-ENG | GB-TWH | Tower Hamlets |
| GB | GB-ENG | GB-TRF | Trafford |
| GB | GB-ENG | GB-WKF | Wakefield (City of) |
| GB | GB-ENG | GB-WLL | Walsall |
| GB | GB-ENG | GB-WFT | Waltham Forest |
| GB | GB-ENG | GB-WND | Wandsworth |
| GB | GB-ENG | GB-WRT | Warrington |
| GB | GB-ENG | GB-WAR | Warwickshire |
| GB | GB-ENG | GB-WBK | West Berkshire |
| GB | GB-ENG | GB-WSX | West Sussex |
| GB | GB-ENG | GB-WSM | Westminster (City of) |
| GB | GB-ENG | GB-WGN | Wigan |
| GB | GB-ENG | GB-WIL | Wiltshire |
| GB | GB-ENG | GB-WNM | Windsor and Maidenhead |
| GB | GB-ENG | GB-WRL | Wirral |
| GB | GB-ENG | GB-WOK | Wokingham |
| GB | GB-ENG | GB-WLV | Wolverhampton |
| GB | GB-ENG | GB-WOR | Worcestershire |
| GB | GB-ENG | GB-YOR | York (City of) |
| GB | GB-IOM | Isle of Man | |
| GB | GB-NIR | Northern Ireland | |
| GB | GB-NIR | GB-ANT | Antrim |
| GB | GB-NIR | GB-ARD | Ards |
| GB | GB-NIR | GB-ARM | Armagh |
| GB | GB-NIR | GB-BLA | Ballymena |
| GB | GB-NIR | GB-BLY | Ballymoney |
| GB | GB-NIR | GB-BNB | Banbridge |
| GB | GB-NIR | GB-BFS | Belfast (City of) |
| GB | GB-NIR | GB-CKF | Carrickfergus |
| GB | GB-NIR | GB-CSR | Castlereagh |
| GB | GB-NIR | GB-CLR | Coleraine |
| GB | GB-NIR | GB-CKT | Cookstown |
| GB | GB-NIR | GB-CGV | Craigavon |
| GB | GB-NIR | GB-DRY | Derry (City of) |
| GB | GB-NIR | GB-DOW | Down |
| GB | GB-NIR | GB-DGN | Dungannon |
| GB | GB-NIR | GB-FER | Fermanagh |
| GB | GB-NIR | GB-LRN | Larne |
| GB | GB-NIR | GB-LMV | Limavady |
| GB | GB-NIR | GB-LSB | Lisburn |
| GB | GB-NIR | GB-MFT | Magherafelt |
| GB | GB-NIR | GB-MYL | Moyle |
| GB | GB-NIR | GB-NYM | Newry and Mourne |
| GB | GB-NIR | GB-NTA | Newtownabbey |
| GB | GB-NIR | GB-NDN | North Down |
| GB | GB-NIR | GB-OMH | Omagh |
| GB | GB-NIR | GB-STB | Strabane |
| GB | GB-SCT | Scotland | |
| GB | GB-SCT | GB-ABE | Aberdeen City |
| GB | GB-SCT | GB-ABD | Aberdeenshire |
| GB | GB-SCT | GB-ANS | Angus |
| GB | GB-SCT | GB-AGB | Argyll and Bute |
| GB | GB-SCT | GB-CLK | Clackmannanshire |
| GB | GB-SCT | GB-DGY | Dumfries and Galloway |
| GB | GB-SCT | GB-DND | Dundee City |
| GB | GB-SCT | GB-EAY | East Ayrshire |
| GB | GB-SCT | GB-EDU | East Dunbartonshire |
| GB | GB-SCT | GB-ELN | East Lothian |
| GB | GB-SCT | GB-ERW | East Renfrewshire |
| GB | GB-SCT | GB-EDH | Edinburgh, City of |
| GB | GB-SCT | GB-ELS | Eilean Siar |
| GB | GB-SCT | GB-FAL | Falkirk |
| GB | GB-SCT | GB-FIF | Fife |
| GB | GB-SCT | GB-GLG | Glasgow City |
| GB | GB-SCT | GB-HLD | Highland |
| GB | GB-SCT | GB-IVC | Inverclyde |
| GB | GB-SCT | GB-MLN | Midlothian |
| GB | GB-SCT | GB-MRY | Moray |
| GB | GB-SCT | GB-NAY | North Ayrshire |
| GB | GB-SCT | GB-NLK | North Lanarkshire |
| GB | GB-SCT | GB-ORK | Orkney Islands |
| GB | GB-SCT | GB-PKN | Perth and Kinross |
| GB | GB-SCT | GB-RFW | Renfrewshire |
| GB | GB-SCT | GB-SCB | Scottish Borders, The |
| GB | GB-SCT | GB-ZET | Shetland Islands |
| GB | GB-SCT | GB-SAY | South Ayrshire |
| GB | GB-SCT | GB-SLK | South Lanarkshire |
| GB | GB-SCT | GB-STG | Stirling |
| GB | GB-SCT | GB-WDU | West Dunbartonshire |
| GB | GB-SCT | GB-WLN | West Lothian |
| GB | GB-WLS | Wales [Cymru] | |
| GB | GB-WLS | GB-BGW | Blaenau Gwent |
| GB | GB-WLS | GB-BGE | Bridgend [Pen-y-bont ar Ogwr GB-POG] |
| GB | GB-WLS | GB-CAY | Caerphilly [Caerffili GB-CAF] |
| GB | GB-WLS | GB-CRF | Cardiff (City of) [Caerdydd GB-CRD] |
| GB | GB-WLS | GB-CMN | Carmarthenshire [Sir Gaerfyrddin GB-GFY] |
| GB | GB-WLS | GB-CGN | Ceredigion [Sir Ceredigion] |
| GB | GB-WLS | GB-CWY | Conwy |
| GB | GB-WLS | GB-DEN | Denbighshire [Sir Ddinbych GB-DDB] |
| GB | GB-WLS | GB-FLN | Flintshire [Sir y Fflint GB-FFL] |
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