Jeremy Corbyn (pictured) has been accused of failing to tackle the racism among his supporters
The anti-Semitism scandal has dogged Labour since Jeremy Corbyn was elected leader in 2015.
Here is a timeline of the controversies:
Labour MP Naz Shah is suspended for anti-Semitic posts - including one in which she appeared to endorse calls for Israelis to be deported to the US.
She apologised and was given a formal warning.
Ken Livingstone goes on the radio to defend Ms Shah - but sparks fresh controversy by claiming that Hitler supported Zionism.
He is suspended by Labour but refuses to apologise and has repeated the claim many times.
He eventually quits Labour two years later, saying his suspension has become a distraction.
A two-month inquiry by civil liberties campaigner Shami Chakrabarti finds that Labour is not overrun by anti-Semitism.
But the launch is overshadowed when Jewish Labour MP Ruth Smeeth flees it in tears after being accused by Corbyn supporter Marc Wadsworth of colluding with the press.
Critics accuse the report of being a whitewash and Ms Chakrabarti is widely criticised for accepting a peerage from Jeremy Corbyn shortly afterwards.
The Home Affairs Select Committee says Labour is guilty of incompetence over its handling of anti-Semitism and of creating a safe space for people with 'vile attitudes towards Jewish people'.
It is revealed that Jeremy Corbyn defended an artist who painted an anti-Semitic mural and said the offensive art should be removed.
He apologises saying he did not properly look at the picture before he made the post.
Jewish leaders take the unprecedented step of holding a demonstration outside Parliament protesting Mr Corbyn's failure to tackle anti-Semitism.
Several Labour MPs address the crowds.
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Marc Wadsworth is expelled from Labour after being accused of