I think people are getting a little carried away. These are strange times with the pandemic and politics can change very quickly. If Labour get rid of starmer after a year it would be crazy (same as if Tories try to push Johnson out - I can’t see an alternative election winning leader in waiting...although Gove probably thinks he is !) Elections are all about match ups, does a May beat Starmer, doubt it
Labour just need to be seen to be listening to their (historical) core base. If there isn’t much ‘levelling up’ in the North by the next election they can win a lot of this support back.
Also, Johnson has always got a fuck up in him so, as I say, things can change very quickly
Ps it will be interesting to see if the current independence polling in Scotland is reflected in Thursdays results.