Well tomorrow at this time LAB will have its new leader and the suggested negative influence of Corbyn will be no more. The big question is whether the former DPP is able to so present a different proposition to voters that first, the seats lost at GE2019, become prospects again.
In a sense the current voting intention polling likely flatters the Tories given how fighting the virus totally dominates everything. The Johnson team is in charge making extraordinary demands of citizens which is largely being followed. Polling in other countries has shown a similar move to the incumbent government.
My guess is that Starmer’s election will receive a general positive response from the public if only that he is not Corbyn. That should help first get the Tory shares below 50% and then provide a foundation for Labour progress.