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The founder of Momentum says Jeremy Corbyn should undergo anti-Semitism training.

Jon Lansman, who co-founded the group out of Jeremy Corbyn's leadership campaign, was speaking at a conference organised by the Jewish Labour Movement.

Lansman is a member of Labour's ruling body and longstanding ally of Mr Corbyn. He was raised in an Orthodox Jewish family, but is an atheist.

Asked if Corbyn should go for such training, Lansman said: "I think there's always a place for education and training in everyone's lives.

"And Jeremy Corbyn has a longstanding commitment to life-long learning."

A source close to Jon said: "It was a lighthearted joke which provoked much laughter amongst the audience."

It came as former chief rabbi Lord Sacks has renewed his attacks on Jeremy Corbyn over claims of anti-Semitism in the Labour Party .

He told BBC1's The Andrew Marr Show: "Jews have been in Britain since 1656, I know of no other occasion in these 362 years when Jews - the majority of our community - are asking 'is this country safe to bring up our children'.

"Now, this is very, very worrying."

(Image: PA)

And Lord Sacks claimed he knew British Jews who had considered leaving the country if Jeremy Corbyn becomes Prime Minister.

Labour Shadow Chancellor John McDonnell said Lord Sacks' comments were "distressing."