A number of Labour officials in Islington North have resigned (or "expect to be expelled") in order to campaign for Corbyn.
Why would they do this less than a week before the election? Wouldn't it have more impact if they started participating in the campaign earlier?
I think it's a sign they expect the race to be close and that Corbyn needs all the help he can get. I've seen talk that many people didn't realize Corbyn was running as an independent so a lot of it will be helping spread the word so they aren't confused when they get a ballot.
From an american or canadian standpoint, british elections are really short. As far as I know, a big push for the week prior is pretty standard for the uk, and things in general are much more casual over there. More money was spent on the Bowman primary here than by all british parties combined have spent during this election period.