The CM postcode area, also known as the Chelmsford postcode area, is a group of 25 postcode districts in England, within 16 post towns. These cover central Essex, plus a small part of east Hertfordshire and a very small part of the London Borough of Havering.
The NP postcode area, also known as the Newport postcode area, is a group of eighteen postcode districts, which are subdivisions of fourteen post towns. These cover south-east Wales, including Newport, Pontypool, Abergavenny, Monmouth, Chepstow, Abertillery, Usk, Tredegar, New Tredegar, Ebbw Vale, Crickhowell, Blackwood, Caldicot and Cwmbran, plus a small part of the English counties of Gloucestershire and Herefordshire.
The GU postcode area, also known as the Guildford postcode area, is a group of 38 postcode districts in South East England, within 24 post towns. These cover west Surrey, north-east Hampshire, northwestern West Sussex and a small part of south-east Berkshire.
The M postcode area, also known as the Manchester postcode area, is a group of postcode districts in the North West of England.
The WD postcode area, also known as the Watford postcode area, is a group of eleven postcode districts in south-east England, within seven post towns. These cover south-west Hertfordshire, plus very small parts of Buckinghamshire and Greater London.
The CO postcode area, also known as the Colchester postcode area, is a group of sixteen postcode districts in the east of England, within nine post towns. These cover northeast Essex and a small part of south Suffolk. The main sorting office is in Colchester.
The DE postcode area, also known as the Derby postcode area, is a group of 23 postcode districts in central England, within 11 post towns. These cover south and central Derbyshire, parts of east Staffordshire and north-west Leicestershire, and very small parts of Nottinghamshire.
The PE postcode area, also known as the Peterborough postcode area, is a group of 36 postcode districts in eastern England, within 18 post towns. These cover north and west Cambridgeshire, much of south and east Lincolnshire, and west Norfolk, plus the north-easternmost part of Northamptonshire, the easternmost part of Rutland and very small parts of Bedfordshire.
The YO postcode area, also known as the York postcode area, is a group of 29 postcode districts in Yorkshire, England, within ten post towns. These cover most of Central and Eastern North Yorkshire and the northern part of the East Riding of Yorkshire. The rest of North Yorkshire is split between the TS, DL, LA, BD, HG, DN and WF postcode areas.
The RG postcode area, also known as the Reading postcode area, is a group of thirty postcode districts in England, within twelve post towns. These cover west and central Berkshire and north Hampshire, plus a small part of south-east Oxfordshire and very small parts of Buckinghamshire and Wiltshire.
The WA postcode area, also known as the Warrington postcode area, is a group of sixteen postcode districts in North West England, within nine post towns. These cover north Cheshire, eastern Merseyside and small parts of south-western Greater Manchester.
The SK postcode area, also known as the Stockport postcode area, is a group of nineteen postcode districts in England, within eleven post towns. These cover south-east Greater Manchester, parts of east Cheshire, north-west Derbyshire and a small part of north Staffordshire.
The SR postcode area, also known as the Sunderland postcode area, is a group of eight postcode districts in north-east England, within three post towns. These cover eastern Tyne and Wear and north-east County Durham.
The HU postcode area, also known as the Hull postcode area, is a group of twenty postcode districts in England, within eight post towns. These cover the south of the East Riding of Yorkshire, including Hull, Beverley, Cottingham, Hessle, Hornsea, Withernsea, Brough and North Ferriby.
The OX postcode area, also known as the Oxford postcode area, is a group of 26 postcode districts in south-central England, within 17 post towns. These cover most of Oxfordshire, plus very small parts of Northamptonshire, Buckinghamshire, Berkshire, Gloucestershire and Warwickshire.
The IV postcode area, also known as the Inverness postcode area, is a group of 52 postcode districts for post towns: Achnasheen, Alness, Avoch, Beauly, Bonar Bridge, Cromarty, Dingwall, Dornoch, Elgin, Fochabers, Forres, Fortrose, Gairloch, Garve, Invergordon, Inverness, Isle of Skye, Kyle, Lairg, Lossiemouth, Muir of Ord, Munlochy, Nairn, Plockton, Portree, Rogart, Strathcarron, Strathpeffer, Strome Ferry, Tain and Ullapool in north Scotland.
The DD postcode area, also known as the Dundee postcode area, is a group of eleven postcode districts in eastern Scotland, within nine post towns. These cover Dundee and Angus, plus part of north-east Fife and small parts of Perth and Kinross and Aberdeenshire.
The BB postcode area, also known as the Blackburn postcode area, is a group of thirteen postcode districts in north-west England, within nine post towns. These cover east Lancashire, including Blackburn, Burnley, Accrington, Barnoldswick, Clitheroe, Colne, Darwen, Nelson and Rossendale.
The PR postcode area, also known as the Preston postcode area, is a group of eleven postcode districts in North West England which together cover northern Merseyside and parts of central and southern Lancashire. Its four post towns are Chorley, Leyland, Southport, and Preston.
The TF postcode area, also known as the Telford postcode area, is a group of thirteen postcode districts in England, within six post towns. These cover north-east Shropshire, including Telford, Broseley, Market Drayton, Much Wenlock, Newport and Shifnal, plus a small part of west Staffordshire.
