By virtue of paragraph(s) 3 of Part 1 of Schedule 12A of the Local Government Act 1972.
Information relating to the financial or business affairs of any particular person (including the authority holding that information).
It is not in the public interest to disclose this information because it contains details relating to the detailed terms of the transaction. Disclosure of the information may prejudice the councils and purchasers position by disclosing commercially sensitive information.