Labour activist Tony Greenstein has been expelled from the party over allegations of antisemitism.
The Brighton-based member was suspended in 2016 and a disciplinary hearing into his conduct was delayed until January for health reasons.
HuffPost UK understands the charges against him related to abusive online behaviour, including the use of the word “Zio”.
A Labour spokesperson confirmed on Sunday that the party’s National Constitutional Committee had found him guilty on three counts of breaching its rulebook.
They added: “The NCC of the Labour Party has today found that all three charges of a breach of the Labour Party’s rule 2.1.8 by Tony Greenstein have been found proved.
“The NCC consequently determined that the sanction for the breach of Labour Party rules will be expelled from membership.
“The Labour Party will make no further comment on this matter.”
Party rules state that no Labour member should engage in conduct which “might reasonably be seen to demonstrate hostility or prejudice based on age; disability; gender reassignment or identity; marriage and civil partnership; pregnancy and maternity; race; religion or belief; sex; or sexual orientation”.
Greenstein is vice-chair of the Labour Against the Witchhunt group, which challenges the suspension of hard-left party members.
A spokesperson for the Jewish Labour Movement said: “We welcome the decision by the Labour Party to expel Tony Greenstein.
“His continued membership is at complete odds with our collective values of solidarity, tolerance and respect.
“Deliberately harassing, intimidatory and hateful language of the kind Tony Greenstein has continually used has no place inside the Labour movement.
“Despite the unacceptably long time it has taken to reach this conclusion, we are heartened that the party has sent out a clear message on this today.
“We will continue to press the party to deal firmly and swiftly with antisemitism including the high number of cases that are still waiting to be resolved.”