Big Al Corbyn has major major problems with credibility. He has been anti EU since the year dot. His nearest and dearest in the party are hell bent on remaining. To keep them sweet he has to change tack and support remain. This quite clearly demonstrates he has no morality and will betray anything and anyone if he thinks it will serve him well. His party membership may be over the moon but the electorate in the heartlands will extract their revenge for his betrayal of them.
I do not expect to see him on the scene in a years time.
Come the next election there will be a reckoning unprecedented in british politics. This assumes hell does not break loose first. This is not a good place to be!