Links to the sites providing various data sets: EDINA; NOMIS; UK DATA ARCHIVE.
Ordnance Survey is the mapping authority for the UK. You can view here the range of products available as well as find information on the acquisition and use of spatial data.
Association for Geographic Information (AGI). We were the first educational corporate member of the AGI and strongly support its role in the UK and European GI community.
The Office of National Statistics is the source for the 2001 Census which, along with many other statistics, can be downloaded for free from this site.
For local information about your neighbourhood from house prices to crime rates and links to what your MP has said in Parliament go to this interesting site. Look up the Acorn geodemographic profile for your home postcode - does it fit you?
Google is probably the fastest most comprehensive internet search engine. At this site your search can be worldwide or restricted to UK.
The GIS Lounge is a wide ranging entry into the world of GIS.
GIS Research UK (GISRUK) is the national GIS research conference primarily aimed at the academic community. It takes place annually at different university venues around the UK.