Postcode district boundaries: Bing / Google
The BR postcode area, also known as the Bromley postcode area, is a group of eight postcode districts in England which are subdivisions of seven post towns. These postcode districts cover part of south-east London, as well as a small part of north-west Kent.
The main sorting office is in Bromley and the area served includes much of the London Borough of Bromley, as well as a small part of the London Borough of Lewisham, Royal Borough of Greenwich and the London Borough of Croydon. Most of BR8 and a small part of BR6 cover the northwestern part of the Kent district of Sevenoaks, while BR8 also covers the hamlet of Clement Street in the Borough of Dartford.
The approximate coverage of the postcode districts:
For the purposes of directing mail, the United Kingdom is divided by Royal Mail into postcode areas. The postcode area is the largest geographical unit used and forms the initial characters of the alphanumeric UK postcode. There are currently 121 geographic postcode areas in use in the UK and a further 3 often combined with these covering the Crown Dependencies of Guernsey, Jersey and Isle of Man.
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.
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.