DCLG's INSPIRE OGC WMS Service under the terms of the the Public Sector End User Licence - INSPIRE
http://www.ordnancesurvey.co.uk/business-and-government/public-sector/mapping-agreements/inspire-licence.html.
This Web Mapping Service, built using open source Geoserver, provides images of many of DCLG's geographic datasets over the internet.
The URL can be taken (from the metadata record or Data Resource details) and used in any GIS system.
