Well, the UK Independence Party has at least one MEP representing London. But one of the British-based listees would be better equipped to address that in detail.
Though it's worth pointing out that England - and when you're talking about "British insularity" (not to mention "Tories") it really is mostly England that you're talking about - is really very thoroughly urbanised. There aren't really a lot of rural people there, Tory or otherwise. It's hard to see how a whole nation could be defined by a characteristic (i.e. insularity) of such a small percentage of the population.