Corbyn, who led Labour between 2015 and 2019, was initially expelled from the party and had the whip withdrawn in April 2020, under the leadership of his erstwhile ally Keir Starmer.
The expulsion came after Corbyn said that claims of antisemitism during his time as a leader had been “overstated” for political reasons, in response to an investigation into his handling of the issue.
I dont think thats a relevant concern in Islington North. The Labour vote at the last election was 3 times all other parties combined and has been Labour (or a Labour spin off mp) since 1937, this is going to be a straight up 2 way fight between Corbyn and whoever Labour put up against him.