European Union (Notification of Withdrawal) Bill

I am very grateful to the noble Lord. I was worried for a moment that he was going to sing at me, but I entirely agree with his point. We are considering the Bill because, and only because, as he reminds the House, the Supreme Court ruled as a matter of law that parliamentary sovereignty is required at this stage of notification of withdrawal. I say, not as a matter of law—because I am not arguing a legal case—but as a matter of constitutional principle, that parliamentary sovereignty is as important at the end of the negotiating process. I beg to move.