Do you have a valid reason for wanting to know, or is it just to complain about how these rich people are buying up the properties and forcing locals out of the local housing market?
Under the freedom of information act, you can legitimately request this info, and the council will be obligated to attempt to provide it, but you may have to pay the statutory amount to commence the search. Ring the council concerned, and ask to be passed to their freedom of information department. They can advise from there.