European Union Bill

Before my very good friend the Minister sits down, perhaps I may put one very quick question to him of a practical nature. He mentioned that we were not the only country in the European Union that had referendum locks. Does he agree that it would be very helpful to the House if, when we get to Report, he could provide us with the list of countries and how many referendum locks that they have. I have a feeling that their number, collectively, may not add up the number of referendum locks that are being proposed by the Government.