I note that many British MEPs belonging to the UK...

I note that many British MEPs belonging to the UK Independence Party (UKIP) have used all their time in Parliament to work against the institution of which they are members. I would not presume to advise them on what they should or should not do. However, since the UK could not leave the EU fast enough as far as they were concerned, I can imagine that they will not stay any longer than they have to.