The RM postcode area, also known as the Romford postcode area, is a group of twenty postcode districts in south-east England, within nine post towns. These cover parts of eastern Greater London and south-west Essex. Inward mail for the area is sorted, along with mail for the E and IG postcode areas, at the Romford Mail Centre.
The TW postcode area, also known as the Twickenham postcode area, is a group of twenty postcode districts in south-east England, within thirteen post towns. These cover parts of south-west London and north-west Surrey, plus a very small part of Berkshire.
The CB postcode area, also known as the Cambridge postcode area, is a group of sixteen postcode districts in the east of England, within five post towns. These cover much of south and east Cambridgeshire, plus parts of west Suffolk and north-west Essex and a very small part of Norfolk.
The KA postcode area, also known as the Kilmarnock postcode area, is a group of 30 postcode districts in south-west Scotland, within 23 post towns. These cover East Ayrshire, North Ayrshire and South Ayrshire.
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 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 DY postcode area, also known as the Dudley postcode area, is a group of fourteen postcode districts in England, within eight post towns. These cover the south-western part of the West Midlands and north Worcestershire, plus the south-westernmost part of Staffordshire and a small part of south-east Shropshire.
The LU postcode area, also known as the Luton postcode area, is a group of seven postcode districts in England, within three post towns. These cover south Bedfordshire, plus small parts of north Hertfordshire and east Buckinghamshire.
The ME postcode area, also known as the Rochester postcode area, is a group of 20 postcode districts in South East England, within 11 post towns. These cover north central Kent, including the Medway unitary authority and the borough of Swale, plus parts of the boroughs of Maidstone, Tonbridge and Malling, and Gravesham. The letters in the postcode are derived from the name of the Medway conurbation.
The PE postcode area, also known as the Peterborough postcode area, is a group of 38 postcode districts in eastern England, which are subdivisions of 18 post towns. These cover most of Cambridgeshire, much of south Lincolnshire and west Norfolk, plus parts of east Northamptonshire and very small parts of Bedfordshire and Rutland.
The RH postcode area, also known as the Redhill postcode area, is a group of twenty postcode districts in South East England, within seventeen post towns. These cover east Surrey and northeastern West Sussex plus small parts of northwestern East Sussex.
The BA postcode area, also known as the Bath postcode area, is a group of nineteen postcode districts in South West England, within sixteen post towns. These cover east Somerset and west Wiltshire, plus very small parts of north-west Dorset and south Gloucestershire.
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 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 EX postcode area, also known as the Exeter postcode area, is a group of 33 postcode districts in South West England, within 30 post towns. These cover north and east Devon, plus the northernmost part of Cornwall and very small parts of Somerset and Dorset.
The PO postcode area, also known as the Portsmouth postcode area, is a group of 34 postcode districts in southern England, within 24 post towns. These cover south-east Hampshire, southwestern West Sussex and the Isle of Wight.
The WS postcode area, also known as the Walsall postcode area, is a group of fifteen postcode districts in England, within six post towns. These cover the northern part of the West Midlands and much of south-east Staffordshire.
The CT postcode area, also known as the Canterbury postcode area, is a group of 21 postcode districts in South East England, within 13 post towns. These cover much of east Kent, including Canterbury, Dover, Folkestone, Birchington, Broadstairs, Deal, Herne Bay, Hythe, Margate, Ramsgate, Sandwich, Westgate-on-Sea and Whitstable.
