Re:HMRC 'plans to share tax data with private firms'
by UVB-76 on Saturday April 19, 2014 @10:55AM
(#7613551)
The source of all the data will be Companies House. You can get (presumably unlimited) access to all annual returns for £17.5k pa [1]
I can't imagine the government make enormous sums of money through the sale of such data, and I think there is a significant public interest in this kind of company data being freely available.
[1] http://www.companieshouse.gov.uk/toolsToHelp/ourPrices.shtml
However, looking into how Duedil got its dataset, it appears they buy the digitised data from Experian and friends, who get it from who knows where.