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 the financial information is based on initial estimates, there is also full breakdown of financial elements of project included and sharing this information would not be recommended as it may prejudice the tender process.