European Union (Notification of Withdrawal) Bill

Of course this is not, as the right hon. Gentleman characterises it, going to be a battle of forecasts. But the forecasts are based on the same thing as the assessments people make when they are judging what will or will not be in their interests. They have a mental model, and sometimes these models can be put into mathematical form, and sometimes that is useful. Surely that is precisely what the City of London is doing when it says to the French, Germans and Italians, “You need us more than we need you.”