I may be wrong (and I hope I am), but I see absolutely no evidence that Labour will prevail in the coming general election in the UK. The polls show that Labour has lost ground compared to how they polled prior to the previous election.
Yes, the pollsters botched the prediction of that one, and badly. It is, however, reasonable to assume that they have learned from their mistakes and adjusted their techniques. Remember, Labour is polling slightly worse than in the previous election, and Labour still lost that previous election. (The surprise in 2017 was that Labour barely lost an election that it was expected to lose by a landslide.)
All in all, it really doesn’t look like Jeremy Corbyn will manage to pull a rabbit out of his hat this time.