I thank noble Lords for their contributions. As all have observed, this is a fairly narrow field of activity; none the less, the questions are predictably penetrating and searching. I will try to deal with them.
The noble and gallant Lord, Lord Craig, echoed by the noble Lord, Lord Tunnicliffe, asked what sort of crimes the serious crime unit will be investigating. I can give some degree of detail, which I hope will be helpful. I should say that it will be generically responsible for the investigation of all serious crimes committed by those subject to service law. It is worth noting that the MoD working definition of “serious crimes” is not the same as that contained in the Serious Crime Act, which I think was at the heart of the question posed by the noble and gallant Lord, Lord Craig.
So to clarify, serious crime for the purposes of the DSCU is an offence listed under Schedule 2 to the Armed Forces Act 2006, an offence committed in proscribed circumstances, or an offence under Section 42 of the Armed Forces Act 2006 for which the corresponding offence under the law in England and Wales is indictable, or any other offence which may not be dealt with at a summary hearing by a commanding officer. This essentially captures most criminal offences, which are triable only by a court martial, and some military offences such as the ill-treatment of personnel in initial training.
Prior to the DSCU standing up, the single services all have a different threshold for how they determine serious crime; as such, getting clear statistics on the full range of serious crimes is challenging. Official statistics for the most serious offences of murder, manslaughter, sexual offences and domestic abuse in the service justice system are published annually. In 2021, there were 239 service police investigations into these offences.
The rank of single service provost martial differs in each service and, as your Lordships will be aware, each is independent from the other and each has no ability to compel the other. But on 5 December, all single service SIB personnel will transfer under the direct command of the provost marshal of serious crime, who will investigate serious crime independently of the three single services and be answerable to the Chief of Defence People and Vice Chief of Defence Staff for the execution their duties. There are agreements that the single service provost martial will assist the provost marshal of serious crime in responding to serious crime in the first instance.