My Lords, this afternoon we have heard a really compelling case for quite a simple demand: the right of Parliament, rather than government, to authorise the arrangements whereby the Article 50 negotiations conclude. Indeed, probably no additional words are needed to strengthen the case made by the noble Lord, Lord Pannick, or many of the others who have spoken. I will not mention them all but the House will forgive me if I mention my noble friends Lady Kennedy of The Shaws and Lady Symons and the noble Baronesses, Lady Altmann, Lady McIntosh and Lady Ludford. What do they have in common? So I must also mention the noble Baroness, Lady Stowell, although sadly she was not able to support the case.
Essentially, Amendment 3 is about implementing the Supreme Court’s view that withdrawal would require parliamentary authorisation. The argument is straightforward. As the noble Lord, Lord Heseltine, said, it would secure in law the Government’s commitment that Parliament is the ultimate decider. Very shortly, maybe even next week, the Prime Minister will trigger Article 50 of the treaty. But neither that treaty nor any UK law states how the arrangements made by our Government should be made into law. What is written in the treaty—in EU law, in other words—is that the final agreement will go to the Council and to the European Parliament, so it is mandatory for that Parliament to give its consent but there is no similar requirement for this Parliament to give its consent.
The Prime Minister has said that she will allow a vote in both Houses and the noble Lord, Lord Forsyth, quoted Mr Jones saying that that was the intent. That, to me, is not a very firm commitment, no matter how sincerely it was given. Indeed, when the Minister said in Committee that the Government’s oral,
“commitment mirrors the powers of the European Parliament”,—[Official Report, 1/3/17; col. 923.]
he was not exactly right because its power is written in law. All we are asking is for an equal legislative requirement for the exit deal to come to this Parliament. It is basically about the Crown’s prerogative against Parliament’s.
I turn to the West Lothian question—no, not that but the Grocott question. We will have to call it the Grocott question as he no longer has a constituency. This was raised by the noble and learned Lord, Lord Mackay. It is true that whether we look at the undertaking given by the Prime Minister or at this amendment, there would be a problem if the House of Commons were to vote one way and your Lordships’ House another. I hope that will not be the case for lots of reasons. Particularly, I hope that by then not just the country but Parliament will have come together, and that we are of one view. But I make it clear from these Benches that if that were to be the outcome, we are absolutely clear that ultimately the will of the Commons must prevail.
Furthermore, if that is the only argument given against this amendment, there are two ways of answering it. One is that we do a bit of hurried work this evening to table an amendment and, if the Government were willing to accept it, that might be the easiest way. Keeping all my friends here late into the night, however, may not be the best way of achieving that end. We would not want to risk voting down the idea of Commons supremacy just because, very sensibly, everyone was back in their beds. The real issue is to get this principle into the Bill and down the road into the Commons. On behalf of the Opposition, I say that if that is the only point of dispute between us, given that we want the supremacy to be down there rather than here, we will happily work with the Government on the form of words to make that absolutely crystal clear.
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