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Strategic Defence and Security Review

I am fascinated by this point about the number of submarines required. Is the hon. Gentleman aware that the plan was originally to have five Polaris submarines and that the number was reduced to four by the incoming Labour Government to give them an excuse to say that they were doing something different from the previous Conservative Government? I sometimes get the impression that some of my now allies are trying to make the same sort of suggestion about changing the number from four to three for a similar reason.