The world of work wants a deal to be done, but the problem with the Prime Minister’s proposals is not just to do with Northern Ireland, moving, as they do, our country away from half a century of close economic collaboration with our biggest market in favour of a decade of economic uncertainty. But on Northern Ireland, after 40 years of war, there is peace. A terrible price was paid to achieve that. Nothing should be done that puts that at risk. May I ask the Prime Minister a very specific question? On the movement of goods and his assertion that there will be no physical infrastructure, he makes reference in his letter to a small number of physical checks at traders’ premises, or at other points on the supply chain. Where are they, and what are they?