It's really too soon to tell.
If UKIPers have it their way, all the way, the atmosphere for foreigners will become poisonous (for an idea about how this might end up being like just watch V for Vendetta or better yet read the graphic novel).
I doubt that, though because even they're not stupid enough to bite the hand that feeds them. However, I said the same thing about the Brexit before.
The world will continue spinning, it just might not revolve around London anymore.