Llywydd, let me try and find three points from what the Member has said to which I could try and make a reply. First of all, it is absolutely incumbent upon those people who talk about alternative arrangements on the border on the island of Ireland to come and explain to us how those alternative arrangements are to operate. It's no use just saying there are other ways in which this could be done. Those people who believe that have to come forward with a credible plan as to how that can be achieved. Nothing that I have read or seen or heard from the Member or anybody else who makes that assertion leads me to believe that there is a genuinely detailed, workable set of proposals that would allow the backstop simply to be evaporated at this point in the negotiations. If there are, people should bring those ideas forward. Mrs May asked, I know, time and again, to those Members on her own side who proposed that these things could be done to give her the information that would allow her to make that proposal credibly. They couldn't, she couldn't, and the Member here certainly can't.

Let me deal with the point that he made about the Foreign Office, because it leads to his point about the union. The Foreign Office's actions in relation to the Welsh and Scottish Governments have been crass in the extreme. I never go abroad to criticise the UK Government; I go to make the points that are made in this Chamber and that I make on behalf of Wales. If the Foreign Office believed for a moment that I would not say the things that I think are important to say on behalf of Wales by saying that I couldn't have a lift in one of their cars—a lift, by the way, that we pay for; it's not a free lift, we pay for it every time we use it. If they thought that that would lead me to change my mind, then that tells you just how detached that department has become from the realities of the way the United Kingdom operates.

That matters to me, Llywydd, because I believe in the United Kingdom. I want the United Kingdom to be a success, and I want Wales to be a successful part of a successful United Kingdom. But when the Foreign Office acts in that high-handed sort of way, then it simply hands a public relations coup over to those people who have a different idea of the future. And in the end, it is the unionists who pose the greatest threat to the union, because they will not take these matters seriously and they act in those foolish sorts of provocative ways. The Welsh Labour Government will go on making the case for the way that the United Kingdom can operate successfully the other side of Brexit, were that to happen, and it would be fantastic, wouldn't it, if those people who speak up as though they owned the union were prepared to take part in that sort of conversation?