Area codes
- 20 - London
- 23 - Portsmouth
- 24 - Coventry
- 28 - Northern Ireland
- 29 - Cardiff
- 113 - Leeds
- 114 - Sheffield
- 115 - Nottingham
- 116 - Leicester
- 117 - Bristol
- 118 - Reading
- 1200 - Clitheroe
- 1202 - Bournemouth
- 1204 - Bolton
- 1205 - Boston
- 1206 - Colchester
- 1207 - Consett
- 1208 - Bodmin
- 1209 - Redruth, Cornwall
- 121 - Birmingham
- 1223 - Cambridge
- 1224 - Aberdeen
- 1225 - Bath
- 1226 - Barnsley
- 1227 - Canterbury
- 1228 - Carlisle
- 1229 - Barrow-in-Furness and Millom
- 1233 - Ashford
- 1234 - Bedford
- 1235 - Abingdon
- 1236 - Coatbridge
- 1237 - Bideford
- 1239 - Cardigan
- 1241 - Arbroath
- 1242 - Cheltenham
- 1243 - Chichester, West Sussex
- 1244 - Chester
- 1245 - Chelmsford
- 1246 - Chesterfield
- 1248 - Bangor
- 1249 - Chippenham
- 1250 - Blairgowrie
- 1252 - Aldershot
- 1253 - Blackpool
- 1254 - Blackburn
- 1255 - Basingstoke
- 1257 - Coppull, Chorley
- 1258 - Blandford
- 1259 - Alloa
- 1260 - Congleton
- 1261 - Banff
- 1262 - Bridlington
- 1263 - Cromer
- 1264 - Andover
- 1267 - Carmarthen
- 1268 - Basildon
- 1269 - Ammanford
- 1270 - Crewe
- 1271 - Barnstaple
- 1273 - Brighton
- 1274 - Bradford
- 1275 - Clevedon, Bristol
- 1276 - Camberley
- 1277 - Brentwood
- 1278 - Bridgwater
- 1279 - Bishop's Stortford
- 1280 - Buckingham
- 1282 - Burnley
- 1283 - Burton upon Trent
- 1284 - Bury St Edmunds
- 1285 - Cirencester
- 1286 - Caernarfon
- 1287 - Guisborough, Cleveland
- 1288 - Bude
- 1289 - Berwick-upon-Tweed
- 1290 - Cumnock, Ayrshire
- 1291 - Chepstow
- 1292 - Ayr
- 1293 - Crawley
- 1294 - Ardrossan, Ayrshire
- 1295 - Banbury
- 1296 - Aylesbury
- 1297 - Axminster
- 1298 - Buxton
- 1299 - Bewdley
- 1300 - Cerne Abbas, Dorset
- 1301 - Arrochar
- 1302 - Doncaster
- 1303 - Folkestone
- 1304 - Dover
- 1305 - Dorchester
- 1306 - Dorking
- 1307 - Forfar
- 1308 - Bridport, Dorset
- 1309 - Forres
- 131 - Edinburgh
- 1322 - Dartford
- 1323 - Eastbourne
- 1324 - Falkirk
- 1325 - Darlington
- 1326 - Falmouth
- 1327 - Daventry
- 1328 - Fakenham
- 1329 - Fareham
- 1330 - Banchory, Deeside
- 1332 - Derby
- 1333 - Peat Inn, Fife
- 1334 - St Andrews, Fife
- 1335 - Ashbourne, Derbyshire
- 1337 - Ladybank, Fife
- 1339 - Aboyne and Ballater, Deeside
- 1340 - Craigellachie, Elgin
- 1341 - Barmouth, Dolgellau
- 1342 - East Grinstead
- 1343 - Elgin
- 1344 - Bracknell, Easthampstead
- 1346 - Fraserburgh
- 1347 - Easingwold
- 1348 - Fishguard
- 1349 - Dingwall
- 1352 - Mold, Flint
- 1353 - Ely
- 1354 - Fenland, Cambridgeshire
- 1355 - East Kilbride
- 1356 - Brechin, Edzell
- 1358 - Ellon
- 1359 - Pakenham, Elmswell
- 1360 - Killearn, Drymen
- 1361 - Duns
- 1362 - Dereham
- 1364 - Ashburton, Devon
- 1366 - Downham Market
- 1367 - Faringdon
- 1368 - Dunbar
- 1369 - Dunoon
- 1371 - Great Dunmow, Essex
- 1372 - Esher
- 1373 - Frome
- 1375 - Grays Thurrock, Essex
- 1376 - Braintree, Essex
- 1377 - Driffield
- 1379 - Diss
- 1380 - Devizes
- 1381 - Fortrose
- 1382 - Dundee
- 1383 - Dunfermline
- 1384 - Dudley
- 1386 - Evesham
- 1387 - Dumfries
- 1388 - Bishop Auckland, Durham and Stanhope (Eastgate), Durham
- 1389 - Dumbarton
- 1392 - Exeter
- 1394 - Felixstowe
- 1395 - Budleigh Salterton, Exmouth
- 1397 - Fort William
- 1398 - Dulverton, Exmoor
- 1400 - Honington
- 1403 - Horsham
- 1404 - Honiton
- 1405 - Goole
- 1406 - Holbeach
- 1407 - Holyhead
- 1408 - Golspie
- 1409 - Holsworthy
- 141 - Glasgow
- 1420 - Alton, Hampshire
- 1422 - Halifax
- 1423 - Boroughbridge and Harrogate
- 1424 - Hastings
- 1425 - Ringwood, New Milton and Highcliffe, Hampshire
- 1427 - Gainsborough
- 1428 - Haslemere
- 1429 - Hartlepool
- 1430 - Market Weighton and North Cave, Howden
- 1431 - Helmsdale
- 1432 - Hereford
- 1433 - Hathersage
- 1434 - Bellingham, Haltwhistle and Hexham
- 1435 - Heathfield
- 1436 - Helensburgh
- 1437 - Clynderwen and Haverfordwest
- 1438 - Stevenage, Hertfordshire
- 1439 - Helmsley
- 1440 - Haverhill
- 1442 - Hemel Hempstead
- 1443 - Pontypridd, Glamorgan
- 1444 - Haywards Heath
- 1445 - Gairloch
- 1446 - Barry, Glamorgan
- 1449 - Stowmarket, Gipping
- 1450 - Hawick
- 1451 - Stow-on-the-Wold, Gloucestershire
- 1452 - Gloucester
- 1453 - Dursley, Gloucestershire
- 1454 - Chipping Sodbury, Gloucestershire
- 1455 - Hinckley
- 1457 - Glossop
- 1458 - Glastonbury
- 1460 - Chard, Ilminster
- 1461 - Gretna
- 1462 - Hitchin
- 1463 - Inverness
- 1464 - Insch
- 1465 - Girvan
- 1466 - Huntly
- 1467 - Inverurie
- 1469 - Killingholme, Immingham
- 1470 - Edinbane, Isle of Skye
- 1471 - Broadford, Isle of Skye
- 1472 - Grimsby
- 1473 - Ipswich
- 1474 - Gravesend
- 1475 - Greenock
- 1476 - Grantham
- 1478 - Portree, Isle of Skye
- 1479 - Grantown-on-Spey
- 1480 - Huntingdon
- 1482 - Hull
- 1483 - Guildford
- 1484 - Huddersfield
- 1485 - Hunstanton
- 1487 - Warboys, Huntingdon
- 1488 - Hungerford
- 1489 - Bishop's Waltham, Hamble Valley
- 1490 - Corwen, Gwynedd
- 1491 - Henley-on-Thames
- 1492 - Colwyn Bay, Gwynedd
- 1493 - Great Yarmouth
- 1494 - High Wycombe
- 1495 - Pontypool, Gwent
- 1496 - Port Ellen, Islay
- 1499 - Inveraray
- 1501 - Harthill, Lothian
- 1502 - Lowestoft
- 1503 - Looe
- 1505 - Johnstone
- 1506 - Bathgate, Lothian
- 1507 - Alford (Lincs), Louth and Spilsby
- 1508 - Brooke and Loddon, Norfolk
- 1509 - Loughborough
- 151 - Liverpool
- 1522 - Lincoln
- 1524 - Lancaster
- 1525 - Leighton Buzzard
- 1526 - Martin, Lincolnshire
- 1527 - Redditch
- 1529 - Sleaford, Lincolnshire
- 1530 - Coalville, Ashby-de-la-Zouch Leicestershire
- 1531 - Ledbury
- 1534 - Jersey
- 1535 - Keighley
- 1536 - Kettering
- 1538 - Ipstones, Leek
- 1539 - Kendal
- 1540 - Kingussie
- 1542 - Keith
- 1543 - Cannock, Lichfield
- 1544 - Kington
- 1545 - Llanarth
- 1546 - Lochgilphead
- 1547 - Knighton
- 1548 - Kingsbridge
- 1549 - Lairg
- 1550 - Llandovery
- 1553 - King's Lynn
- 1554 - Llanelli
- 1555 - Lanark
- 1556 - Castle
- 1558 - Llandeilo
- 1559 - Llandysul
- 1560 - Moscow
- 1561 - Laurencekirk
- 1562 - Kidderminster
- 1563 - Kilmarnock
- 1564 - Lapworth, Knowle
- 1565 - Knutsford
- 1566 - Launceston
- 1567 - Killin
- 1568 - Leominster
- 1569 - Stonehaven, Kincardineshire
- 1571 - Lochinver
- 1572 - Oakham
- 1573 - Kelso
- 1575 - Kirriemuir
- 1576 - Lockerbie
- 1577 - Kinross
- 1579 - Liskeard
- 1580 - Cranbrook, Kent
- 1582 - Luton
- 1584 - Ludlow
- 1586 - Campbeltown, Kintyre
- 1588 - Bishop's Castle, Ludlow
- 1590 - Lymington
- 1591 - Llanwrtyd Wells
- 1592 - Kirkcaldy
- 1594 - Lydney
- 1595 - Lerwick, Foula and Fair Isle
- 1597 - Llandrindod Wells
- 1598 - Lynton
- 1603 - Norwich
- 1604 - Northampton
- 1606 - Northwich
- 1608 - Chipping Norton
- 1609 - Northallerton
- 161 - Manchester
- 1620 - North Berwick
- 1621 - Maldon
- 1622 - Maidstone
- 1623 - Mansfield
- 1624 - Isle of Man
- 1625 - Macclesfield
- 1626 - Newton Abbot
- 1628 - Maidenhead
- 1629 - Matlock
- 1630 - Market Drayton
- 1631 - Oban
- 1633 - Newport
- 1634 - Medway
- 1635 - Newbury
- 1636 - Newark-on-Trent
- 1637 - Newquay
- 1638 - Newmarket
- 1639 - Neath
- 1642 - Middlesbrough
- 1643 - Minehead
- 1644 - New Galloway
- 1646 - Milford Haven
- 1647 - Moretonhampstead
- 1650 - Cemmaes Road, Machynlleth
- 1651 - Oldmeldrum
- 1652 - Brigg, North Kelsey
- 1653 - Malton
- 1654 - Machynlleth
- 1655 - Maybole
- 1656 - Bridgend, Ogmore Vale
- 1659 - Sanquhar, Nithsdale
- 1661 - Prudhoe, Northumberland
- 1663 - New Mills
- 1664 - Melton Mowbray
- 1665 - Alnwick, Northumberland
- 1666 - Malmesbury
- 1669 - Rothbury, Northumberland
- 1670 - Morpeth
- 1672 - Marlborough
- 1673 - Market Rasen
- 1674 - Montrose
- 1675 - Coleshill, Warwickshire, Meriden
- 1676 - Meriden
- 1678 - Bala, Meirionydd
- 1683 - Moffat
- 1684 - Malvern
- 1685 - Merthyr Tydfil
- 1686 - Llanidloes and Newtown
- 1688 - Tobermory, Isle of Mull
- 1689 - Orpington
- 1690 - Betws-y-Coed, North Wales
- 1691 - Oswestry
- 1692 - North Walsham
- 1694 - Church Stretton, Mynd
- 1695 - Skelmersdale/Ormskirk
- 1697 - Brampton
- 1698 - Motherwell
- 1702 - Southend-on-Sea
- 1704 - Southport
- 1706 - Rochdale, Rossendale & Shaw
- 1707 - Welwyn Garden City and Potters Bar
- 1708 - Romford
- 1709 - Rotherham
- 1720 - Isles of Scilly
- 1721 - Peebles
- 1722 - Salisbury
- 1723 - Scarborough
- 1724 - Scunthorpe
- 1725 - Rockbourne
- 1726 - St Austell
- 1727 - St Albans
- 1728 - Saxmundham
- 1729 - Settle, Ribblesdale
- 1730 - Petersfield
- 1732 - Sevenoaks
- 1733 - Peterborough
- 1737 - Redhill
- 1738 - Perth
- 1740 - Sedgefield
- 1743 - Shrewsbury
- 1744 - St Helens
- 1745 - Rhyl
- 1746 - Bridgnorth, Shropshire
- 1747 - Shaftesbury
- 1748 - Richmond
- 1749 - Shepton Mallet
- 1750 - Selkirk
- 1751 - Pickering
- 1752 - Plymouth
- 1753 - Slough
- 1754 - Skegness
- 1756 - Skipton
- 1757 - Selby
- 1758 - Pwllheli
- 1759 - Pocklington
- 1760 - Royston
- 1761 - Temple Cloud, Somerset
- 1763 - Royston
- 1764 - Crieff, Ruthven
- 1765 - Ripon
- 1766 - Porthmadog
- 1767 - Sandy
- 1768 - Penrith
- 1769 - South Molton
- 1771 - Maud, Peterhead
- 1772 - Preston
- 1773 - Ripley
- 1775 - Spalding
- 1777 - Retford
- 1778 - Market Deeping/Bourne
- 1779 - Peterhead
- 1780 - Stamford
- 1782 - Stoke-on-Trent
- 1784 - Staines
- 1785 - Stafford
- 1786 - Stirling
- 1787 - Sudbury
- 1788 - Rugby
- 1789 - Stratford-upon-Avon
- 1790 - Spilsby
- 1792 - Swansea
- 1793 - Swindon
- 1794 - Romsey
- 1795 - Sittingbourne, Sheppey
- 1796 - Pitlochry
- 1797 - Rye
- 1798 - Pulborough, Sussex
- 1799 - Saffron Walden
- 1803 - Torquay
- 1805 - Torrington
- 1806 - Voe, Shetland
- 1808 - Tomatin
- 1821 - Kinrossie, Tayside
- 1822 - Tavistock
- 1823 - Taunton
- 1824 - Ruthin, Vale of Clwyd
- 1825 - Uckfield
- 1827 - Tamworth
- 1828 - Coupar Angus, Tayside
- 1829 - Tarporley
- 1830 - Kirkwhelpington, Otterburn
- 1832 - Clopton, Oundle
- 1833 - Barnard Castle, Teesdale
- 1834 - Narberth, Tenby
- 1837 - Okehampton
- 1840 - Camelford, Tintagel
- 1842 - Thetford
- 1843 - Thanet
- 1844 - Thame
- 1845 - Thirsk
- 1847 - Thurso and Tongue
- 1848 - Thornhill
- 1851 - Great Bernera and Stornoway, Outer Hebrides
- 1852 - Kilmelford, Oban
- 1854 - Ullapool
- 1855 - Ballachulish, Onich
- 1856 - Orkney
- 1857 - Sanday, Orkney
- 1858 - Market Harborough
- 1862 - Tain
- 1863 - Bonar Bridge
- 1864 - Tinto, Abington
- 1865 - Oxford, University
- 1866 - Kilchrenan, Oban
- 1869 - Bicester, Oxfordshire
- 1870 - Isle of Benbecula
- 1871 - Castlebay, Outer Hebrides
- 1872 - Truro
- 1873 - Abergavenny, Usk
- 1874 - Brecon, Usk
- 1875 - Tranent
- 1877 - Callander, Trossachs
- 1878 - Lochboisdale, Outer Hebrides, Uist
- 1879 - Scarinish, Tiree
- 1880 - Tarbert
- 1882 - Kinloch Rannoch, Tummel Bridge
- 1883 - Caterham, Oxted
- 1884 - Tiverton
- 1885 - Pencombe, Teme Valley
- 1886 - Bromyard, Teme Valley
- 1887 - Aberfeldy, Tay Valley
- 1888 - Turriff
- 1889 - Rugeley, Uttoxeter
- 1890 - Ayton, Berwickshire and Coldstream
- 1892 - Tunbridge Wells
- 1895 - Uxbridge
- 1896 - Galashiels, Tweed
- 1899 - Biggar, Tweed
- 1900 - Workington
- 1902 - Wolverhampton
- 1903 - Worthing
- 1904 - York
- 1905 - Worcester
- 1908 - Milton Keynes
- 1909 - Worksop
- 191 - Durham
- 1920 - Ware
- 1922 - Walsall
- 1923 - Watford
- 1924 - Wakefield
- 1925 - Warrington
- 1926 - Warwick
- 1928 - Runcorn
- 1929 - Wareham
- 1932 - Weybridge
- 1933 - Wellingborough
- 1934 - Weston-super-Mare
- 1935 - Yeovil
- 1937 - Wetherby
- 1938 - Welshpool
- 1942 - Wigan
- 1943 - Guiseley, Wharfedale
- 1945 - Wisbech
- 1946 - Whitehaven
- 1947 - Whitby
- 1948 - Whitchurch
- 1949 - Whatton
- 1950 - Sandwick, Yell
- 1951 - Colonsay
- 1952 - Telford, Wellington
- 1953 - Wymondham, Wicklewood
- 1954 - Madingley, Willingham
- 1955 - Wick
- 1959 - Westerham, Otford, West Kent
- 1962 - Winchester
- 1963 - Wincanton
- 1964 - Hornsea
- 1967 - Strontian
- 1968 - Penicuik
- 1969 - Leyburn
- 1970 - Aberystwyth, Ystwyth
- 1971 - Scourie, Wrath
- 1972 - Glenborrodale
- 1974 - Llanon, Ystwyth
- 1975 - Alford (Aberdeen) and Strathdon
- 1977 - Pontefract, West Riding
- 1978 - Wrexham
- 1980 - Amesbury
- 1981 - Wormbridge
- 1982 - Builth Wells
- 1983 - Isle of Wight
- 1984 - Watchet
- 1985 - Warminste
- 1986 - Bungay
- 1987 - Ebbsfleet
- 1989 - Ross-on-Wye
- 1992 - Lea Valley, Waltham X
- 1993 - Witney
- 1994 - St Clears, West Wales
- 1995 - Garstang, Wyre