UKIP are in the position the Lib Dems were (stick with me on this one) a few years back, free to make promises about just about anything safe in the knowledge that they have absolutely no chance of having to make good on them. Simply shouting whatever will collect votes and trying to please everyone by offering the all something.
Given their record of not showing up in EU debates or votes (even for policies they support or massively oppose) I’d not hold out much hope of them making any kind of impact in parliament other than being loud and obnoxious to all while blaming everyone else for the problems.