s 321A Inspection of service police investigations
(1) Her Majesty's Inspectors of Constabulary (“the inspectors”) are to inspect, and report to the Secretary of State on, the independence and effectiveness of investigations carried out by each service police force. (2) In this section “ investigations ” means investigations of matters where service offences have or may have been committed, and includes investigations outside the United Kingdom. (3) For the purposes of subsection (1) the inspectors may— (a) undertake such number of inspections as they think appropriate; (b) undertake inspections when they think it appropriate; and (c) decide which aspects of, or matters related to, investigations by a service police force are to be the subject of a particular inspection; but this is subject to subsection (4). (4) The Secretary of State may at any time require the inspectors to inspect, and report to the Secretary of State on, any or all of the following— (a) the independence of investigations carried out by a particular service police force; (b) the effectiveness of such investigations; (c) a particular aspect of, or matter related to, such investigations. (5) For the purposes of this section the tri-service serious crime unit is to be regarded as a service police force.