So if you automatically have to vote for Labour to be a Labour member, I'm not sure how that isn't purging people who don't support Corbyn?
It seems an unenforceable rule to me,
I live in a safe Labour seat so it wouldn’t apply to me if I was still a party member.
But......happen I lived in a Tory/Liberal marginal I would mist certainly be voting Lib Dem even I still had my card.
And they would never know.