<P> Each postcode area is further divided into post towns and postcode districts . There are on average 20 postcode districts to a postcode area . The London post town is instead divided into several postcode areas . </P> <P> The single or pair of letters chosen for postcode areas are generally intended as a mnemonic for the places served . Postcode areas, post towns and postcode districts do not follow political boundaries and usually serve much larger areas than the place names with which they are associated . For example, within the PA postcode area the PA1 and PA78 postcode districts are 140 miles apart; and the eight postcode areas of the London post town cover only 40% of Greater London . The remainder of its area is covered by sections of twelve adjoining postcode areas: EN, IG, RM, DA, BR, TN, CR, SM, KT, TW, HA and UB . </P> <Table> <Tr> <Th> Postcode area </Th> <Th> Postcode area name </Th> <Th> Code formation </Th> </Tr> <Tr> <Td> AB </Td> <Td> Aberdeen </Td> <Td> </Td> </Tr> <Tr> <Td> AL </Td> <Td> St Albans </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> Birmingham </Td> <Td> </Td> </Tr> <Tr> <Td> BA </Td> <Td> Bath </Td> <Td> </Td> </Tr> <Tr> <Td> BB </Td> <Td> Blackburn </Td> <Td> </Td> </Tr> <Tr> <Td> BD </Td> <Td> Bradford </Td> <Td> </Td> </Tr> <Tr> <Td> BH </Td> <Td> Bournemouth </Td> <Td> </Td> </Tr> <Tr> <Td> BL </Td> <Td> Bolton </Td> <Td> </Td> </Tr> <Tr> <Td> BN </Td> <Td> Brighton </Td> <Td> </Td> </Tr> <Tr> <Td> BR </Td> <Td> Bromley </Td> <Td> </Td> </Tr> <Tr> <Td> BS </Td> <Td> Bristol </Td> <Td> </Td> </Tr> <Tr> <Td> BT </Td> <Td> Belfast </Td> <Td> </Td> </Tr> <Tr> <Td> CA </Td> <Td> Carlisle </Td> <Td> </Td> </Tr> <Tr> <Td> CB </Td> <Td> Cambridge </Td> <Td> </Td> </Tr> <Tr> <Td> CF </Td> <Td> Cardiff </Td> <Td> </Td> </Tr> <Tr> <Td> CH </Td> <Td> Chester </Td> <Td> </Td> </Tr> <Tr> <Td> CM </Td> <Td> Chelmsford </Td> <Td> </Td> </Tr> <Tr> <Td> CO </Td> <Td> Colchester </Td> <Td> </Td> </Tr> <Tr> <Td> CR </Td> <Td> Croydon </Td> <Td> </Td> </Tr> <Tr> <Td> CT </Td> <Td> Canterbury </Td> <Td> </Td> </Tr> <Tr> <Td> CV </Td> <Td> Coventry </Td> <Td> </Td> </Tr> <Tr> <Td> CW </Td> <Td> Crewe </Td> <Td> </Td> </Tr> <Tr> <Td> DA </Td> <Td> Dartford </Td> <Td> </Td> </Tr> <Tr> <Td> DD </Td> <Td> Dundee </Td> <Td> </Td> </Tr> <Tr> <Td> DE </Td> <Td> Derby </Td> <Td> </Td> </Tr> <Tr> <Td> DG </Td> <Td> Dumfries </Td> <Td> Dumfries and Galloway </Td> </Tr> <Tr> <Td> DH </Td> <Td> Durham </Td> <Td> </Td> </Tr> <Tr> <Td> DL </Td> <Td> Darlington </Td> <Td> </Td> </Tr> <Tr> <Td> DN </Td> <Td> Doncaster </Td> <Td> </Td> </Tr> <Tr> <Td> DT </Td> <Td> Dorchester </Td> <Td> </Td> </Tr> <Tr> <Td> DY </Td> <Td> Dudley </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> East London </Td> <Td> </Td> </Tr> <Tr> <Td> EC </Td> <Td> East Central London </Td> <Td> </Td> </Tr> <Tr> <Td> EH </Td> <Td> Edinburgh </Td> <Td> </Td> </Tr> <Tr> <Td> EN </Td> <Td> Enfield </Td> <Td> </Td> </Tr> <Tr> <Td> EX </Td> <Td> Exeter </Td> <Td> </Td> </Tr> <Tr> <Td> FK </Td> <Td> Falkirk </Td> <Td> </Td> </Tr> <Tr> <Td> FY </Td> <Td> Blackpool </Td> <Td> The Fylde </Td> </Tr> <Tr> <Td> </Td> <Td> Glasgow </Td> <Td> </Td> </Tr> <Tr> <Td> GL </Td> <Td> Gloucester </Td> <Td> </Td> </Tr> <Tr> <Td> GU </Td> <Td> Guildford </Td> <Td> </Td> </Tr> <Tr> <Td> HA </Td> <Td> Harrow </Td> <Td> </Td> </Tr> <Tr> <Td> HD </Td> <Td> Huddersfield </Td> <Td> </Td> </Tr> <Tr> <Td> HG </Td> <Td> Harrogate </Td> <Td> </Td> </Tr> <Tr> <Td> HP </Td> <Td> Hemel Hempstead </Td> <Td> </Td> </Tr> <Tr> <Td> HR </Td> <Td> Hereford </Td> <Td> </Td> </Tr> <Tr> <Td> HS </Td> <Td> Outer Hebrides </Td> <Td> First and last letters of Hebrides </Td> </Tr> <Tr> <Td> HU </Td> <Td> Hull </Td> <Td> </Td> </Tr> <Tr> <Td> HX </Td> <Td> Halifax </Td> <Td> </Td> </Tr> <Tr> <Td> IG </Td> <Td> Ilford </Td> <Td> Possibly Ilford and Chigwell, or Ilford and Barking </Td> </Tr> <Tr> <Td> IP </Td> <Td> Ipswich </Td> <Td> </Td> </Tr> <Tr> <Td> IV </Td> <Td> Inverness </Td> <Td> </Td> </Tr> <Tr> <Td> KA </Td> <Td> Kilmarnock </Td> <Td> </Td> </Tr> <Tr> <Td> KT </Td> <Td> Kingston upon Thames </Td> <Td> </Td> </Tr> <Tr> <Td> KW </Td> <Td> Kirkwall </Td> <Td> </Td> </Tr> <Tr> <Td> KY </Td> <Td> Kirkcaldy </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> Liverpool </Td> <Td> </Td> </Tr> <Tr> <Td> LA </Td> <Td> Lancaster </Td> <Td> </Td> </Tr> <Tr> <Td> LD </Td> <Td> Llandrindod Wells </Td> <Td> </Td> </Tr> <Tr> <Td> LE </Td> <Td> Leicester </Td> <Td> </Td> </Tr> <Tr> <Td> LL </Td> <Td> Llandudno </Td> <Td> </Td> </Tr> <Tr> <Td> LN </Td> <Td> Lincoln </Td> <Td> </Td> </Tr> <Tr> <Td> LS </Td> <Td> Leeds </Td> <Td> </Td> </Tr> <Tr> <Td> LU </Td> <Td> Luton </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> Manchester </Td> <Td> </Td> </Tr> <Tr> <Td> ME </Td> <Td> Rochester </Td> <Td> Medway (now sometimes known as Maidstone) </Td> </Tr> <Tr> <Td> MK </Td> <Td> Milton Keynes </Td> <Td> </Td> </Tr> <Tr> <Td> ML </Td> <Td> Motherwell </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> North London </Td> <Td> </Td> </Tr> <Tr> <Td> NE </Td> <Td> Newcastle upon Tyne </Td> <Td> </Td> </Tr> <Tr> <Td> NG </Td> <Td> Nottingham </Td> <Td> </Td> </Tr> <Tr> <Td> NN </Td> <Td> Northampton </Td> <Td> </Td> </Tr> <Tr> <Td> NP </Td> <Td> Newport </Td> <Td> </Td> </Tr> <Tr> <Td> NR </Td> <Td> Norwich </Td> <Td> </Td> </Tr> <Tr> <Td> NW </Td> <Td> North West London </Td> <Td> </Td> </Tr> <Tr> <Td> OL </Td> <Td> Oldham </Td> <Td> </Td> </Tr> <Tr> <Td> OX </Td> <Td> Oxford </Td> <Td> </Td> </Tr> <Tr> <Td> PA </Td> <Td> Paisley </Td> <Td> </Td> </Tr> <Tr> <Td> PE </Td> <Td> Peterborough </Td> <Td> </Td> </Tr> <Tr> <Td> PH </Td> <Td> Perth </Td> <Td> </Td> </Tr> <Tr> <Td> PL </Td> <Td> Plymouth </Td> <Td> </Td> </Tr> <Tr> <Td> PO </Td> <Td> Portsmouth </Td> <Td> </Td> </Tr> <Tr> <Td> PR </Td> <Td> Preston </Td> <Td> </Td> </Tr> <Tr> <Td> RG </Td> <Td> Reading </Td> <Td> </Td> </Tr> <Tr> <Td> RH </Td> <Td> Redhill </Td> <Td> </Td> </Tr> <Tr> <Td> RM </Td> <Td> Romford </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> Sheffield </Td> <Td> </Td> </Tr> <Tr> <Td> SA </Td> <Td> Swansea </Td> <Td> </Td> </Tr> <Tr> <Td> SE </Td> <Td> South East London </Td> <Td> </Td> </Tr> <Tr> <Td> SG </Td> <Td> Stevenage </Td> <Td> </Td> </Tr> <Tr> <Td> SK </Td> <Td> Stockport </Td> <Td> </Td> </Tr> <Tr> <Td> SL </Td> <Td> Slough </Td> <Td> </Td> </Tr> <Tr> <Td> SM </Td> <Td> Sutton </Td> <Td> Possibly Sutton and Morden, the two post towns that are within the SM area </Td> </Tr> <Tr> <Td> SN </Td> <Td> Swindon </Td> <Td> </Td> </Tr> <Tr> <Td> SO </Td> <Td> Southampton </Td> <Td> </Td> </Tr> <Tr> <Td> SP </Td> <Td> Salisbury </Td> <Td> Salisbury Plain </Td> </Tr> <Tr> <Td> SR </Td> <Td> Sunderland </Td> <Td> </Td> </Tr> <Tr> <Td> SS </Td> <Td> Southend - on - Sea </Td> <Td> </Td> </Tr> <Tr> <Td> ST </Td> <Td> Stoke - on - Trent </Td> <Td> </Td> </Tr> <Tr> <Td> SW </Td> <Td> South West London </Td> <Td> </Td> </Tr> <Tr> <Td> SY </Td> <Td> Shrewsbury </Td> <Td> </Td> </Tr> <Tr> <Td> TA </Td> <Td> Taunton </Td> <Td> </Td> </Tr> <Tr> <Td> TD </Td> <Td> Galashiels </Td> <Td> Tweeddale </Td> </Tr> <Tr> <Td> TF </Td> <Td> Telford </Td> <Td> </Td> </Tr> <Tr> <Td> TN </Td> <Td> Tunbridge Wells </Td> <Td> </Td> </Tr> <Tr> <Td> TQ </Td> <Td> Torquay </Td> <Td> </Td> </Tr> <Tr> <Td> TR </Td> <Td> Truro </Td> <Td> </Td> </Tr> <Tr> <Td> TS </Td> <Td> Cleveland </Td> <Td> Teesside </Td> </Tr> <Tr> <Td> TW </Td> <Td> Twickenham </Td> <Td> </Td> </Tr> <Tr> <Td> UB </Td> <Td> Southall </Td> <Td> Uxbridge </Td> </Tr> <Tr> <Td> </Td> <Td> West London </Td> <Td> </Td> </Tr> <Tr> <Td> WA </Td> <Td> Warrington </Td> <Td> </Td> </Tr> <Tr> <Td> WC </Td> <Td> Western Central London </Td> <Td> </Td> </Tr> <Tr> <Td> WD </Td> <Td> Watford </Td> <Td> </Td> </Tr> <Tr> <Td> WF </Td> <Td> Wakefield </Td> <Td> </Td> </Tr> <Tr> <Td> WN </Td> <Td> Wigan </Td> <Td> </Td> </Tr> <Tr> <Td> WR </Td> <Td> Worcester </Td> <Td> </Td> </Tr> <Tr> <Td> WS </Td> <Td> Walsall </Td> <Td> </Td> </Tr> <Tr> <Td> WV </Td> <Td> Wolverhampton </Td> <Td> </Td> </Tr> <Tr> <Td> YO </Td> <Td> York </Td> <Td> </Td> </Tr> <Tr> <Td> ZE </Td> <Td> Lerwick </Td> <Td> Zetland </Td> </Tr> </Table> <Tr> <Th> Postcode area </Th> <Th> Postcode area name </Th> <Th> Code formation </Th> </Tr>

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