My hon. Friend is right about the importance of the German constitutional court and its written constitution, and it has sometimes warned of the limits of the EU’s role. It has insisted that questions should be referred to the German Parliament, but it has never directly overridden EU law, and we must bear that in mind about its constitutional structure. As my hon. Friend knows, and as he supported in the European Union Act 2011, we have made clear the ultimate sovereignty of Parliament in this country. That is the constitutional position, but we made it clearer in our 2011 Act.