I didn't claim that he had. I don't know if he has or not. It doesn't really matter - you seemed to want evidence that the statement was correct, not evidence that the statement was made.
MEPs do not have the authority to revoke EU membership - it's a matter for national government. That is why UKIP cannot prevent British membership of the EU. They can take the money and not vote for anything (as their MEPs currently do), but this still doesn't mean that MEPs can pull out of the...