An API for Codepoint Open. Shows the Latitude, Longitude, Easting, Northing and Local Authority details (county, district, ward) for a given point. Also shows nearest postcodes to a postcode and allows reverse geocoding (lat/lng to postcode)
Data available in XML, JSON, CSV and RDF.
Dataset Name: Codepoint Open
Dataset URL: http://www.ordnancesurvey.co.uk/oswebsite/opendata
Dataset Provider: Ordnance Survey