Because I suspect that I may be the only person on the Conservative Benches to make the arguments that I am going to make, I have taken some care with them. Given the time limit, I will not be able to deploy my full arguments here, but I will publish them on my website, because I know that many people will be following this debate. I agree with Angus Robertson that it is an extremely important debate.
It is because I care about the security of my country that I will not be joining my right hon. and hon. Friends in the Lobby tonight. Because we have capped defence expenditure at 2% of GDP, the cost of this programme comes at the expense of the rest of the defence programme. Therefore, we need to make a more rational judgment about the balance of expenditure in order to meet the risks that our country faces. This is a colossal investment in a weapons system that will become increasingly vulnerable and at which we will have to throw good money—tens of billions of pounds more than already estimated—in order to try to keep it safe in the years to come.