Forget Sitefinder - for tax reasons the VOA has better information
The UK Valuation Office Agency keep an Address / Post code based record for Council Business rates collection and these are published on the web
see for example http://www.2010.voa.gov.uk/rli/en/advanced/searchResults
Extract from Hansard 4 Feb 2004 : Column 749 http://www.parliament.the-stationery-office.co.uk/pa/cm200304/cmhansrd/vo040204/debtext/40204-02.htm
Phil Sawford (Kettering) (Lab): Is my hon. Friend aware that the current records for such sites are hopelessly inadequate and inaccurate? Map references suggest that sites in the south of England are in northern France, and that equipment on Blackpool tower is in the middle of the Irish sea. Will she make every effort to ensure that the records are updated, and that new technology is used to make them as accurate as possible?
Yvette Cooper: My hon. Friend is right. Of course the information needs to be as accurate as possible. An independent audit of the work done by operating companies has found that they have not been keeping adequate information; we have raised the issue with them, and they have said that they will improve it. Meanwhile, the Radiocommunications Agency is producing a full list of all sites in the country. I will raise the issues that my hon. Friend has mentioned with the agency.