The NW (North Western) postcode area, also known as the London NW postcode areaRoyal Mail, Address Management Guide, (2004), is a group of postal districts in north west London, England. It is the successor of the NW sector, originally created as part of the London postal district in 1856. History The London postal arrangements were further refined in 1917 when the sub-districts (as appended to postal addresses) were given new alpha-numeric identities for public use;[LINK: http://www.postalheritage.org.uk/history/downloads/BPMA_Info_Sheet_Postcodes_web.pdf] British Postal Museum & Archive Information Sheet - Postcodes (PDF) the districts usually cover a wider area than their names might suggest. As of 2004, the district names do not form part of the postal address. Royal Mail, Address Management Guide, (2004) Coverage

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