Page last updated at 23:02 GMT, Friday, 2 October 2009 00:02 UK

Modern postcodes are 50 years old

London street sign
London's streets were the first to be divided into postal districts

The UK's country-wide postcode system, introduced to speed up mail deliveries but now used for a range of applications, is half a century old.

The whole of the UK was divided into postal districts for the first time after a trial run in Norwich in 1959.

Royal Mail says the UK has more than 1.7 million postcodes, covering about 28 million addresses.

Everything from insurance premiums to satellite navigation systems now rely on them.

Their power over property prices has even led to some residents campaigning to have their postcode changed.

In 2003, the residents of the Royal Borough of Windsor and Maidenhead fought unsuccessfully to lose their SL postcode because it links them with nearby Slough - made famous by comedy series The Office.

Royal Mail started to use the alphanumeric codes when electronic sorting machines were introduced to speed up the service in the 1950s.

By the mid-1980s new technology meant the codes could be read automatically by sorting machines with no human intervention.

In Norwich, the first three characters of the code ('NOR') represented the name of the city, and the last three characters a particular street.

POSTCODE FACTS
The UK has 1.7 million postcodes
The Royal Mail online postcode checker receives about 4.5 million hits a month
Each postcode covers an average of 15 addresses
The first postal districts were introduced in London in 1857
Father Christmas has his own postcode - SAN TA1

The postcode now starts with the outward code, to distinguish one postal district from another, and the inward code which sorts between roads and buildings within the district.

Some large organisations have personalised postcodes, such as the Scottish Parliament's EH99 1SP and the ExCeL centre in London, E16 1XL.

The man who invented the postage stamp, Sir Rowland Hill, introduced Britain's first postal districts in London in 1857. Other major towns and cities were introduced in the 1860s.

The capital was divided into 10 separate postal districts - N, S, E, W, NE, NW, SE, SW, EC and WC. The S and NE codes have since been reassigned to the Sheffield and Newcastle areas.

Royal Mail is using the anniversary to urge the public to use postcodes.

Almost a fifth of non-business letters, cards and packets are sent without a full or accurate postcode, it says.



Print Sponsor


SEE ALSO
Village calls for postcode change
22 Jul 08 |  Coventry/Warwickshire
Postcodes used in pension sums
31 Aug 07 |  Business
Essex is luckiest lotto postcode
14 Jan 07 |  Essex
The power of the postcode
05 Apr 05 |  London

RELATED INTERNET LINKS
The BBC is not responsible for the content of external internet sites


FEATURES, VIEWS, ANALYSIS
Has China's housing bubble burst?
How the world's oldest clove tree defied an empire
Why Royal Ballet principal Sergei Polunin quit

BBC navigation

BBC © 2013 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.

Americas Africa Europe Middle East South Asia Asia Pacific