On the theme of overseas companies and property, this is a map of all property owned by overseas companies in the UK. http://www.private-eye.co.uk/registry
Incredibly, Osbourne even wants to sell the Land Registry Office which keeps this data. Potentially meaning a) this too could be sold to an overseas company and b) it could become (as a private company) exempt from FOIA requests that allow such databases to be constructed.
On the theme of overseas companies and property, this is a map of all property owned by overseas companies in the UK.
http://www.private-eye.co.uk/registry