We need to bear in mind Patrick Minford's view though. That leading Brexit economist suggested that the low or no tariff regime made far more likely by a hard Brexit would lead to the virtual elimination of British manufacturing - although this would not, in his view, be undesirable.
... and farming. Minford's view is that the manufacturing and farming are unproductive and won't survive in a post-Brexit world. That can't be painted as Project Fear as that's the view of a leading Brexiteer.
Interestingly, farmers heavily vote Tory. It will be instructive to see their views if their farms are closed down after Brexit.