Corbyn pictured with man who called for Labour members to be able to ask: 'Holocaust, yes or no?'

In an article for the American Herald Tribune last October, Mr Peled wrote: “One can safely argue that Israel and its multiple tentacles around the world will stop at nothing to prevent Corbyn from entering Downing Street 10 [sic].”

He went on to say that “the label ‘Holocaust denier’ is too often thrown at people who present perspectives of the Holocaust that disagree with those who would have a monopoly on the discourse, i.e. the Zionist establishment.”

A spokesman for the Labour leader said: “'Miko Peled is not attending Labour party conference.

“He does not have a pass and has not been inside conference. Jeremy has been stopped by hundreds of people in Liverpool over the last few days.”

However, Mr Peled was photographed inside Labour conference earlier this week.

On Tuesday evening, two police officers guarded a Holocaust Educational Trust event at Labour conference, at which a Holocaust survivor spoke.

In 2013, Elleanne Green, the founder of the Palestine Live Facebook group where posts were shared promoting Holocaust denial and conspiracy theories about Israel being responsible for 9/11, talked about a meeting in the House of Commons at which Mr Peled spoke.

Ms Green called Mr Peled “an extraordinary speaker… thoughtful and gentle and utterly inspirational."

She said she was “so glad that I persuaded Jeremy Corbyn MP to take time from his busy schedule to pop in to the first half hour of the meeting – one of the very few MPs of any party for whom I have any respect left.”

Mr Corbyn was subsequently a member of the Palestine Live Facebook group from 2014 to 2015, shortly after being elected Labour leader.