Earlier quoted context omitted.
For which point? - For the first, Entrepreneurs In (my group) was obviously, well, entrepreneurs. - For the second, everyone on both sides of the debate agrees that non-London folk won it for Brexit. You're literally the first person I've ever met that would dispute this.
I agree that non-London folk swung it. But it is a bit of a stretch to think either a) that makes everyone outside London working class b) that other cities didn't vote Leave I see lots of landed gentry and farmers who were big on Leave (back then). Lots of Tory home counties types too. I don't think it is even slightly helpful to consider it a class issue.
b) Yes, London and other big cities voted remain.
I don't think landed gentry make a huge portion of the population. Farmers are generally considered to be working class.