Before the Election, David Cameron promised a Sovereignty Bill. In his speech entitled Giving Power Back To The People he said: ‘As we have no written constitution . . . we have no explicit legal guarantee that the last word on our laws stays in Britain . . . so, as well as making sure that further power cannot be handed to the EU without a referendum, we will also introduce a new law, in the form of a United Kingdom Sovereignty Bill, to make it clear that ultimate authority stays in this country, in our Parliament