So many more left wing younger voters ( who don’t know much about Corbyn) have boosted the ranks of voters, or did in the last GE, but he has also accounted for losses, people who will never vote for him, but are Labour voters.
Without these, it would be very hard to win a GE for him.
Momentum have insinuated themselves everywhere that counts, Universities, and councils up and down the land,
They are the mostly unacknowledged but powerful activist group going, trying to root out moderate Labour MP candidates and councillors wherever they can to push their man Corbyn ( and it is the man, not the LP that they are working so hard for) into power.