This link is to a document the Government released in Septemebr 2006 called "Information sharing vision statement". It outlines the Government's stated aim of sharing your data across Whitehall and opening up numerous security holes in the process. Not only that they want to share the data down from Whitehall to local authroity level as well. It also contains a section on "Exploring greater infromation sharing with the private sector".
It was a bad idea then but few politicians made comment on it. Will any of them say anything now?