By virtue of the Local Government Act 1993 Section 10A Paragraph 2
Personnel matters concerning particular individuals (other than councillors)
Information that would, if disclosed, confer a commercial advantage on a person with whom the council is conducting (or proposes to conduct) business
Commercial information of a confidential nature that would, if disclosed prejudice the commercial position of the person who supplied it
Commercial information of a confidential nature that would, if disclosed confer a commercial advantage on a competitor of the council