My hon. Friend raises a really interesting point. The checks and balances being discussed by the Attorney General relate to a rigorous investigation. Comprehensive and new compelling evidence should provide a safeguard. The problem with a statute of limitations per se is that where clear evidential thresholds are met—when it comes to clear wrongdoing—we start entering difficult areas. We should at least start a conversation about it, but the Prime Minister has specifically asked my right hon. Friend the Chair of the Defence Committee not to do so.