The complainant requested information about an estimate of the cost of damage caused by protestors to aircraft at RAF Brize Norton. 
Thames Valley Police (the “public authority”) withheld the requested information on the basis of sections 30(1)(a) and (b) (Investigations and proceedings) of FOIA.
The Commissioner’s decision is that all of the requested information is exempt from disclosure on the basis of section 30(1)(a) and that the public interest favours maintaining this exemption. 
The Commissioner does not require any further steps.