From Parliamentary constituencies to council wards, Boundary-Line™ maps every administrative boundary in detail for you. And what's more, it's completely free to download and use.
Get started with geographical analysis, simple route planning and asset management.
GB Counties - Past and Present
Explore the county boundaries of Great Britain throughout time with our counties map.
OS Open Names
A comprehensive dataset of place names, roads numbers and postcodes for Great Britain.
OS Names API
With OS Names API, you’ll have access to a straightforward, rapid lookup service: drilling down into the details we hold in our OS Open Names dataset.