Example image of eyePlorer eyePlorer map for 'Postal counties of the United Kingdom': Royal Mail United Kingdom Post town Raison d'être List of postcode areas in the United Kingdom Postcodes in the United Kingdom Postcode Address File Data field Department for Transport House of Lords John Cavendish, 5th Baron Chesham London postal district County of London Greater London Essex Hertfordshire Kent Middlesex Surrey East Barnet Edgware Golders Green London Borough of Barnet NW postcode area Sewardstone London Government Act 1963 Potters Bar The Times Local Government Act 1972 M postcode area Local Government (Scotland) Act 1973 Scotland Frank Beswick, Baron Beswick Central Scotland Clackmannanshire Counties of Scotland Gordon Oakes Secretary of State for the Environment County of Bute Optical character recognition Data cleansing Highland (council area) Pembrokeshire Powys LE postcode area Market Harborough Oakham Data set Postal Services Commission Farndish