About this data

Postcodes and areas

IPMS uses the Office for National Statistics' ONS Postcode Directory to find the local authority and Local Skills Improvement Plan area for a postcode, and the location used to work out driving distances. The release in use is Aug 2026.

• Contains OS data © Crown copyright and database right 2026
• Contains Royal Mail data © Royal Mail copyright and database right 2026
• Source: Office for National Statistics licensed under the Open Government Licence v.3.0

We use postcodes in Great Britain. Northern Ireland postcodes aren't included.

Driving distances

Mileage is the driving distance between two postcodes, worked out by Microsoft Azure Maps. Only the two locations are sent: never a name or any other detail.