European Union Referendum Bill

In the Foreign Secretary’s opening remarks, he referred to the number of changes that have taken place since 1975, when there was last a referendum. Can I take it from what he said that unless the British people have a right to reject all those changes brought about without a referendum he will not be satisfied? Or, can he at least set out today what it is that the Government wish to take back, rather than simply condemning his and all previous Governments since 1975?