Too many Moslems
Perhaps, although UKIP did OK in other areas where there are signifiant muslim communities. No, there are more likely reasons. It’s partly because UKIP London isn’t as well organised as some other areas, but mostly because London is THE home of the UK’s political, social and cultural elite. Our equivalent of the Washington village, that little bubble of very clever enlightened intellectuals who are oh so much better able to run our lives than we are.