I don't know enough about UKIP's domestic policies to say it but from external appearances I would think it shouldn't be hard for a Tory to vote UKIP (with the exception of the few ardent globalists therewith). Is that correct?
UKIPs policies are a mix of center right/libertarian.
The two are compatiable and indeed many UKIP voters, members were former member of the Tories - in fact the only two UKIP MPs defected from the conservatives and Farage himself many years ago was a member of that party.