The move comes after Corbyn was suspended from Labour in October 2020, after saying antisemitism in the party was “dramatically overstated for political reasons by our opponents inside and outside the party, as well as by much of the media.”
“It frustrates me immensely that this week’s big moment in so many young people’s lives is being risked by the chaos and incompetence at the top of this government," Starmer said.
Sir Keir's announcement pleased climate activists, who feared he was backing away from radical climate action.
“I don’t buy into this argument that character just doesn’t matter," he said, adding that in the end "integrity, honesty and accountability" will out.
Theresa May also gave an impassioned speech announcing she will be voting against the cuts to the aid budget - the first time an ex-PM has voted against a Conservative three-line whip in 25 years.
Kim Leadbeater, sister of murdered former constituency MP Jo Cox, squeezed home in the contest by just 323 votes.
From the newsletter: Kim Leadbeater will be the new MP for Batley and Spen after a nail-biting by-election.
Who should he listen to Blair, who 'looks like Peter Stringfellow,' or Corbyn?
The research also suggested that 69 per cent of Labour members would prefer Andy Burnham as leader.