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Parliamentary Voting System and Constituencies Bill

I was not cogitating—I was bemused by the rationality of the hon. Gentleman's argument. If I understood it correctly, he was saying that there was a level of turnout that would not authorise, essentially, so dramatic a change in the public mind. If it does not have the authority of a certain percentage enabling us to claim that it was the will of the people, at what level does he think that should be set? There must surely be a level for such a profound constitutional change to be authorised, as was suggested with reference to the union movement, for instance.