I would imagine if Farage takes a job with the Tories quite a lot of BP backers wouldn't vote for him. The whole reason they joined BP is to move away from the Conservatives. It's not out of the question either. Farage is an ego-maniac, and he only abandoned the Tories when he saw they were becoming pro-EU. Now they are swinging towards being anti-EU then they are his type of people. It would be interesting if there would be a backlash though, as none of the people joining BP are members. There are no rules to hold Farage to account.