Trump's approval rating in this country is sub 20%, the idea that he'd win swathes of the North is absurd. But I agree with TiltsAreUnderrated that he'd probably be strongest in places like Essex and coastal communities in the East of England, though not enough to actually win any region.
The approval relates to Trump the person from an outside perspective. Give Trump the Tory leadership and he does just a little worse than Johnson (the worse being the suburbs Johnson managed to hold for the Tories).
