Jon Lansman, the founder of Momentum, has withdrawn his candidacy to become Labour Party general secretary.
It had been reported widely last week that Jeremy Corbyn, the Labour leader, had called Mr Lansman in an attempt to dissuade him from standing in the election to succeed Iain McNicol, who is stepping down from the role.
Mr Lansman, who was elected to Labour’s national executive committee earlier this year, announced his decision not to contest the post on Twitter on Sunday.
He said his aim in standing had been to “open up the contest” and instigate a debate on the development of the party.
