The SW (South Western) postcode area, also known as the London SW postcode area,[2] is a group of 20 postcode districts within the London post town in England. The area comprises the South Western operational district (covering the subdivisions of postcode district SW1, plus SW2 - SW10) and the Battersea operational district (covering SW11 - SW20),[3] and is the only area within the London post town to lie on both sides of the River Thames.
Mail for the area is sorted at the Jubilee Mail Centre in Hounslow, along with mail for the TW, KT and GU postcode areas.
Postal administration
The postcode area originated in 1857 as the SW district. In 1868 it gained some of the area of the very short-lived S district, with the rest going to SE. It was divided into numbered districts in 1917.[4] The South Western district consists of the postcode districts SW1–SW10 and the once Battersea-headquartered component consists of the postcode districts SW11–SW20.[3][5]
The South Western head district was designated as SW1 and the rest of the numbering followed, alphabetically, by their most important parish, chapelry, topological or built environment feature names, up to 10. Similarly as to the Battersea SW11 once "head district".
List of postcode districts
The approximate coverage of the postcode districts, with the historic postal district names shown in italics:[5]
Surrounds of St James's Park tube station centred on Broadway, Queen Anne's Gate and Old Queen Street to include both sides of part of Victoria Street – derivation: Horse Guards Parade
Westminster
SW1P
LONDON
A projection around Parliament Square. Nearby Westminster School to Westminster Cathedral to CCAL, University of the Arts, London (omitting all backstreets nearest to Vauxhall Bridge Road) – derivation: Parliament Square
SW1 is the South Western head district. Since about the 1890s it has had a surplus of addresses and buildings for practical division into one set of inwards codes so is divided into smaller postcode districts since 1917 used for mail purposes. SW1 is used in geographic reference, street signs and colloquial use across most communities. Its eight subdivisions continue to be classed as one 'district'. Within SW1A are keynote inward codes including:
^"Postcodes"(PDF). Archive Information Sheet. The British Postal Museum and Archive. January 2005. Archived from the original(PDF) on 20 March 2009. Retrieved 24 March 2010.