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Business of the House (Lisbon Treaty) (No. 8)

I hope that it does not unsettle the right hon. Gentleman if I disagree with him. Where there is an issue of substantial constitutional significance—for example, if we were ever to consider joining the euro—there is a case for consulting the public in a referendum, as we did when we established devolution in Scotland and Wales. Those are substantial, lasting constitutional changes, and I agree that there is, on occasion, a place for a referendum.