asked Her Majesty's Government:

How, on the basis of closed-circuit television footage alone and without further investigation, when a complaint by a detainee alleging that there has been a wrongful use of control and restraint on him is referred to them by a unit of the Border and Immigration Agency (BIA), the police can be satisfied invariably that the use of control and restraint was both reasonable in its application and technically correct, as stated in Master Number 39 of the BIA Response to the Complaints Audit Committee Annual Report 2006-07. [HL315]

As indicated in the Border and Immigration Agency's response to the Complaints Audit Committee's annual report, the agency makes CCTV footage available to the police to assist them in reaching a decision. The conduct of an investigation by the police is an operational matter for the chief officer of the force concerned. Any complaints relating to the conduct of an investigation should be referred to the individual chief officer.