The complainant has requested information about Prevent from the Home Office. The Home Office provided some information but withheld the remainder citing section 24(1) (National security) of FOIA. During the Commissioner’s investigation, it further relied on section 23(1) (Information supplied by or relating to bodies dealing with security matters) and 40(2) (Personal information) of FOIA. The Commissioner’s decision is that all three exemptions are properly engaged. No steps are required.