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Trident

Does my right hon. Friend agree that for the nuclear non-proliferation treaty to be effective, two things are important: first, it has to be enforced; and secondly, non-nuclear states have to be convinced of the logic of it? If someone was in Israel at the moment considering whether to get rid of the nuclear weapons that they have, or if someone was in Iran—I mean a secular Iranian, not Ahmadinejad—wondering whether it is a good idea to acquire nuclear weapons, would it really be logical for them to think that they should not acquire nuclear weapons if the message they get from this country is that we need to prepare for producing the next generation just as an insurance policy for things that we do not know are going to happen?