If an officer becomes aware of an allegation or circumstances within subsection (2), he must as soon as is reasonably practicable ensure that a service police force F1or the tri-service serious crime unit is aware of the matter.

An allegation is, or circumstances are, within this subsection if it or they would indicate to a reasonable person that a Schedule 2 offence has or may have been committed by a relevant person.

In subsection (2) “relevant person” means a person whose commanding officer is the officer mentioned in subsection (1).

In this Chapter “Schedule 2 offence” means a service offence listed in Schedule 2.

The Secretary of State may by order amend Schedule 2.

If an officer of a prescribed description becomes aware of circumstances of a prescribed description, he must as soon as is reasonably practicable ensure that a service police force F2or the tri-service serious crime unit is aware of the matter.

In this section “prescribed” means prescribed by regulations under section 128.

An allegation is, or circumstances are, within this subsection if it or they would indicate to a reasonable person that a service offence has or may have been committed by a relevant person.

In subsection (2) “relevant person” means a person whose commanding officer is the officer mentioned in subsection (1).

Subsection (4) does not apply if the matter has already been investigated in such way and to such extent as is appropriate.