My noble friend is absolutely right on that point. Subsection (3) of the proposed new clause states that:
“The prior approval of both Houses of Parliament shall … be required in relation to an agreement on the future relationship of the United Kingdom with the European Union”.
I put that point to the noble Lord, Lord Pannick, in my intervention. This effectively gives this House, and the House of Commons, a veto on Brexit. It gives it the ability to prevent us from leaving the European Union, despite the fact that we have had the biggest vote in our history from people requiring that. It would be immensely destructive to the reputation of Parliament and of this House.
Subsection (4) states that:
“The prior approval of both Houses of Parliament shall also be required in relation to any decision by the Prime Minister that the United Kingdom shall leave the European Union without an agreement as to the applicable terms”.
That means that Ministers are unable to walk away. This was the mistake that David Cameron made. If he had walked away he might have been able to get a proper deal—who knows? He did not walk away and they knew he was not going to. That is why he got such a useless deal. This ensures that Ministers cannot walk away. For the noble Lord, Lord Pannick, to suggest that the amendment is simply implementing the Prime Minister’s promise is a complete misrepresentation.