Labour are in a pickle.
Most of their members want to remain, but two thirds of Labour seats voted to leave.
So if they now back remain they risk losing seats in those leave voting areas.
Plus their conversion comes a bit late in the day. The LibDems have always been remain.
I believe that the Tories will desperately try and cobble some fudge together; Imo they are in trouble as well. Their members want to leave, their MPs want to remain.
All in all, it's a bit of a mess.