European Union Bill

I am interested in the line that my right hon. Friend is taking. Without pre-empting any other discussion, does he agree that this is also about the whole question of our membership of the European Union being only on loan from this House because under the Factortame decision Lord Bridge made it clear that it was a voluntary act and no more? Does he therefore think that inserting a reference to the European Communities Act 1972, as proposed in the amendment tabled by the former Lord Chancellor, Lord Mackay of Clashfern, would be making a profound mistake in thinking that this all hinges on the Act when in fact it depends on Parliament itself?