European Union (Withdrawal) Bill

That is getting us into this question about experts again and whether there is such a thing as a fact or whether everything in this world is an opinion. It is important to make sure that if there are facts and if we can prove cause and effect—for example, if we know that the introduction of inspections or a hard border is going to slow down lorries going through a particular port—we can, QED, prove that there is going to be a particular consequence for the economy. That sort of analysis ought to be shared with the wider world.