My right hon. Friend laid the foundations for linking prosperity in a much more deliberate and thoughtful manner into defence and defence procurement. I hope he will see that reflected in the strategy tomorrow. It is of course welcome that the review brings more prosperity—the investment in Boxers to be made in places like Telford; Ajax in Merthyr Tydfil, a Challenger upgrade and the commitment to a next generation of aerospace. As a Lancashire MP, the prosperity that Typhoon has given us all in my part of the world is incredibly important.
On the rationale of the deterrent, it cannot be taken from a one-sided view. We have to look at our adversary, Russia, and see the investments it has made, as well as its plans to both break the intermediate nuclear treaty, which was broken in 2018, and to invest in new weapon systems and missile defence. If we are going to keep it as credible, then we need to make sure that we do that.
On the R&D budget, I am not aware—I will write to my right hon. Friend with a correction if necessary—that the £6.6 billion is anything to do with the nuclear warhead programme or anything else. For clarity, the United Kingdom does not buy warheads from other countries. Under the nuclear proliferation treaty, warheads have to be developed within that very country itself.