Rebecca Long Bailey, pictured with Jeremy Corbyn in November last year, is seen as the continuity candidate for the Labour leadership

Jeremy Corbyn was responsible for failing to adequately tackle “unacceptable” antisemitic behaviour in the Labour party, his preferred successor has admitted.

Rebecca Long Bailey said she had long been unhappy with the way in which allegations had been dealt with in the party and had made her views clear to both Mr Corbyn and senior staff around him.

She pledged that, if elected, she would make the issue a priority and promised to implement any recommendations made by the Equalities and Human Rights Commission investigation that is currently ongoing.

Her criticism of Mr Corbyn is in stark contrast to previous comments when she said she would give the Labour leader ten out of ten for his tenure in charge of the party.

Her campaign is