Let me make these two points to begin with to the leader of Plaid Cymru: first of all, he's completely right, of course, that in 'Securing Wales' Future' we argued for leaving the European Union on the basis that we would remain in the customs union and the single market, but that was before we left the European Union. At that point, that was a perfectly plausible policy, and, in fact, Theresa May came quite close to actually being able to deliver it at her Chequers meeting before the current Prime Minister walked out of her Cabinet.

Unfortunately, we have left the European Union since then, and imagining that the prescriptions we put forward in those circumstances are simply still available to us today—. I just say to the leader of the opposition that it simply isn't there to be done. So, while I agree with what he says about the damage that is being done to Welsh ports and to Welsh businesses, the problem he has is that he is advancing a solution that he doesn't have available to him.

Just returning to the single market, it's not like leaving Plaid Cymru and agreeing to join it again next year. [Interruption.] [Laughter.] There we are; we know. We see how easily that can be done. It is simply not the same sort of enterprise to think that you can walk back into an agreement with the European Union, years after we have left, with a trade and co-operation agreement already in place—. And that's legally binding. That’s how I would regard it. I know the Tories don't regard it as such, having signed up to it, but the TCA is a treaty signed in international law. To say you can just walk back into the single market and the customs union acts as though that international agreement had never been signed up to.

Here is what we would wish to see as a Government. We want to see constructive steps, and you can only have constructive steps if you are in the room together talking, to fix the Northern Ireland protocol. We want to see those unnecessary trade barriers reduced and we want to secure access to those joint programmes, particularly Horizon 2020, which this UK Government said it had negotiated as part of the deal when we left the European Union. All of those things were put in front of the UK Government yesterday, by my colleague Vaughan Gething, in meetings with them. All of those things appear in the speech made yesterday by Keir Starmer. What the leader of the Labour Party is interested in is a genuine realignment of our relationship with the European Union, based on the realities that we face, rather than, I'm afraid, magical thinking.