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Strategic Defence and Security Review

I have given way a number of times and I shall give way again. I believe that at the beginning of this debate, it is vital and useful to go back to first principles and remind ourselves about the purpose of defence. It bears repeating that the first duty of a Government is to provide security for our citizens. Although many arms of government are directed towards or contribute to that aim, the armed forces are central to the effort. Of course, our armed forces can do many things for the promotion of our national interest and to support Government policy more widely. But we must not lose sight of their primary mission—to maintain the capability to apply military force, when needed, so that political decision makers have the widest possible range of choices when making strategic decisions. That has two aspects. First, our armed forces protect our citizens and territory by deterring and containing threats, preventing possibilities from becoming actualities. The nuclear deterrent is, of course, fundamental to our ability to deter the most extreme threats to the United Kingdom. As I just said in response to the hon. Member for Islington North (Jeremy Corbyn), in 2007 the Conservative party in opposition supported the decision to renew the Trident system based on the analysis set out in the 2006 White Paper, and we remain committed to continuous at-sea deterrence. As the coalition agreement has made clear, we are scrutinising the Trident renewal programme to ensure that we get value for money, and my Liberal Democrat colleagues will continue to make the case for alternatives. However, we underestimate the value of deterrence at our peril and we do ourselves a disservice if we merely confine the concept to nuclear weapons. We know from historical experience that a declaration of peaceful intent is not sufficient to dissuade aggressors and that a weakening of national defences can encourage them. All our forces, including conventional forces, have a powerful deterrent effect, which we should seek to maximise. Recently, we have not recognised that as much as we should have. I want the SDSR to change that—to take a fresh look at what we are doing to dissuade aggression and at how we might do it better.