Jon Lansman, the Jewish founder of pro-Corbyn campaign group Momentum, is supporting Rebecca Long Bailey's bid to replace him as Labour leader, it has been reported.
Mr Lansman has been informally advising Ms Long Bailey, who is expected to soon formally announce her bid, and is likely to join her campaign in a senior role, The Sunday Times reported.
Ms Long Bailey, the shadow business secretary and MP for Salford and Eccles, is predicted to likely pick up endorsements from the party's left.
But critics of the outgoing leader have warned against, picking a successor who continues the Corbyn project.
