According to The Economist, a little more than half of the recent great wave of immigration to the UK has come from outside the EU. There's a one-off special case in there - the Lumley immigrants, who've been largely non-productive, greater than average users of health care, & have mostly settled in one of the most crowded & undersupplied with housing parts of the country. But even without them, the hordes of W. African cleaners, Filipina nurses & health care assistants, teaching assistants from Kenya, Bangladeshi fast (non-Bengali) food vendors who speak almost no English, etc. do make one wonder how we're supposed to suddenly stop receiving great numbers of immigrants just from leaving the EU. If a firm with offices in Newbury stops employing local housewives working part-time to clean its offices & hires a contract cleaning firm employing Nigerians, Ivoirians, etc., & state-owned bodies launch recruiting drives in the Philippines, what difference does EU membership make?
And then there's the little matter of our steel industry, where the people currently in power here blocked an EU initiative to impose anti-dumping tariffs on Chinese steel, & our industry has declined more than just about any other EU steel producer. How would leaving the EU make a positive difference?
And so on . . .