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 CV postcode area, also known as the Coventry postcode area, is a group of 24 postcode districts in central England, within eleven post towns. These cover the eastern part of the West Midlands county, most of Warwickshire, a part of west Leicestershire and a very small part of Northamptonshire.
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 Greater London and Hertfordshire, within seven post towns. These cover south-west Hertfordshire, plus very small parts of Buckinghamshire and the London Borough of Hillingdon.
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 LE postcode area, also known as the Leicester postcode area, is a group of 21 postcode districts in central England, within 12 post towns. These cover most of Leicestershire and Rutland, plus small parts of south Nottinghamshire and north Northamptonshire, and very small parts of Derbyshire and Warwickshire.
The LS postcode area, also known as the Leeds postcode area, is a group of 29 postcode districts in England, within six post towns. These cover northern West Yorkshire and some parts of North Yorkshire.
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 CA postcode area, also known as the Carlisle postcode area, is a group of 28 postcode districts in north-west England, within 22 post towns. These cover northern Cumbria, including Carlisle, Penrith, Workington, Whitehaven, Maryport, Cockermouth, Egremont, Alston, Appleby-in-Westmorland, Beckermet, Brampton, Cleator, Cleator Moor, Frizington, Holmrook, Keswick, Kirkby Stephen, Moor Row, Ravenglass, Seascale, St Bees and Wigton, plus a very small part of Northumberland.
The BD postcode area, also known as the Bradford postcode area, is a group of 24 postcode districts in England, within seven post towns. These cover northwestern West Yorkshire and southwestern North Yorkshire, plus very small parts of Lancashire.
The PL postcode area, also known as the Plymouth postcode area, is a group of 35 postcode districts in South West England, within 25 post towns. These cover west Devon and east Cornwall.
The SN postcode area, also known as the Swindon postcode area, is a group of eighteen postcode districts in England, within ten post towns. These cover north Wiltshire, plus a small part of south-west Oxfordshire and a very small part of Gloucestershire.
The PH postcode area, also known as the Perth postcode area, is a group of 43 postcode districts for post towns: Aberfeldy, Acharacle, Arisaig, Auchterarder, Aviemore, Ballachulish, Blairgowrie, Boat of Garten, Carrbridge, Corrour, Crieff, Dalwhinnie, Dunkeld, Fort Augustus, Fort William, Glenfinnan, Grantown-on-Spey, Invergarry, Isle of Canna, Isle of Eigg, Isle of Rum, Kingussie, Kinlochleven, Lochailort, Mallaig, Nethy Bridge, Newtonmore, Perth, Pitlochry, Roy Bridge and Spean Bridge in Scotland.
The FK postcode area, also known as the Falkirk postcode area, is a group of 21 postcode districts in central Scotland, within 18 post towns. These cover most of the Falkirk council area, most of the Stirling council area and Clackmannanshire, plus small parts of Fife, Perth and Kinross, and Argyll and Bute.
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 L postcode area, also known as the Liverpool postcode area, is a group of postcode districts in North West England. Together they cover central and southern Merseyside, southern West Lancashire, and a small part of north-west Cheshire. Its four post towns are Bootle, Liverpool, Ormskirk, and Prescot.
The G postcode area, also known as the Glasgow postcode area, is a group of postcode districts in central Scotland, within five post towns. These districts are primarily centered on Glasgow itself, and West Dunbartonshire, plus parts of the council areas of Argyll and Bute, East Dunbartonshire, North Lanarkshire, South Lanarkshire, East Renfrewshire and Stirling.
The HX postcode area, also known as the Halifax postcode area, is a group of seven postcode districts in England, within four post towns. These cover most of the Metropolitan Borough of Calderdale in western West Yorkshire, including Halifax, Elland, Sowerby Bridge and Hebden Bridge.
The HS postcode area, also known as the Outer Hebrides postcode area, is a group of nine postcode districts, within eight post towns, covering the Outer Hebrides in Scotland.
