Come on. The tories have been screwing the NHS for 14 years. And behaving like unassahamed theives through covid. Scamming funding to basically keep the NHS alive through the pandemic.
How the hell is it suddenly worth leaving the party. Only when an MP is sure they will lose. Then joining the party most likely to win.
Sorry the idea this is an idealistic move, is flying from the rear of a male bovine.