Digimap is the on-line mapping data service of the Ordnance Survey, the UK's national mapping agency.
With Digimap you can use current contemporary Ordnance Survey products to create both simple and customised maps for viewing and printing. Download Ordnance Survey map data for use within GIS and CAD applications.
Registration for Digimap is easy - simply follow the instructions at https://digimap.edina.ac.uk/