United Kingdom Internal Market Bill

Of course we all want agreement and we all want a trade deal, but what happens if relations break down? Will the right hon. Gentleman confirm that, first and foremost, the Labour party is a Unionist party that believes 100% in the economic integrity of the United Kingdom and will not act as a poodle for nationalists? Can he give me an absolute guarantee that if relations break down and we reject this Bill, we will not be in a very difficult place in terms of the economic integrity of the United Kingdom?