mikey, you might be interested in this (pre-voting) analysis from the Economist
Like all political outfits, UKIP is a coalition. It is a partnership of right-wing shire Tories and white, ageing working-class voters disillusioned with Labour. The instincts of these two groups differ in various areas, but they are united by a preference for authoritarian and nationalist policies. Yet a smaller “third UKIP” also exists: Thatcherite and libertarian, comprising much of the party’s youth and some of its younger parliamentary candidates. Until now, this lot have not been prominent (or, in the case of the quietly libertarian Mr Farage, frank) enough to melt the socially conservative glue holding the first and second UKIPs together. But Mr Carswell is nothing if not outspokenly small-statist. Unlike most of his new party, his instincts on immigration are liberal, he cares deeply about civil liberties and wants to disestablish the church. It is not impossible to imagine his election as UKIP’s first fully-fledged MP (and the way that he votes in parliament) hastening the confrontation between these different wings of the party.