http://www.lindamcavanmep.org.uk/other-issues/brexit.php says
The government has decided that both British Ministers and MEPs will continue to play a full role in EU affairs up until Brexit. I was, therefore, pleased to be re-elected chair of the development committee and to see my Labour colleague Claude Mores re-elected chair of the civil liberties committee. In addition to our normal parliamentary and constituency duties, part of MEPs' role now will be to scrutinise the Brexit deal. We will also get a vote on the final Brexit deal, probably in the spring of 2019.
It's not too clear to me what that is talking about, especially the first sentence. Clearly this is a hypothetical question (given the British government's decision not to do anything to the contrary), but what else could the British government could have done (that would have still been legal), with respect to British MEPs? Could they have withdrawn them? Or maybe just the majority (Conservative) party could have done that just with their own Conservative MEPs?