My right hon. Friend the Prime Minister referred several times to the need for legal certainty. The response today from the Attorney General to a question that I asked on this very matter suggested that he was always willing to assist the House in being able to find that legal certainty. May I ask that any changes negotiated are brought back to the House, and that the Attorney General gives us the benefit of that advice? The legal certainty is what will make many colleagues feel that they can or cannot support something?