BRITICE looks like being really useful for those studying cold environments, and the impact that the British Ice sheet had on the country, and the landforms that it left behind.
It's a project of Chris Clark and colleagues at the University of Sheffield.
There is a range of mapping available, including a Google Earth layer, and also files that can be opened in ArcGIS and other similar GIS packages.
One for those who want to get stuck in to some serious analysis of glacial features.
Thanks to Al Monteith for the tipoff to the site via Twitter.