A Labour Party member, who claims have have worked as a video producer for the Stop The War group and Palestine Solidarity Campaign, has shared antisemitic material on social media, including claims the Holocaust was a hoax.
Paul Merron advertises his w4media operation on his Twitter account along with claims that he has worked for several organisations - including an unconfirmed suggestion he has worked for the Labour Party itself.
He writes: "I joined the Labour Party to support Jeremy Corbyn, the first politician in my lifetime to inspire me with his honest, courage and values."
But angry party members have contacted to the JC to complain about messages on his social media.
In one post, he shared a message that said: "15 year old-girl learns the truth about the Holohoax."
In another he shares imagery around the 1933 Haavara Agreement involving the German Nazi regime under the title: "The Nazi-Zionist Connection - Shocking Hidden History."
Another post falsely states: "Six Jewish Companies Control 96% Of The Worlds Media".
Another uses antisemitic tropes around the Jewish blood libel to falsely suggest Israel is the leading nation in organ trafficking.
Peter Mason, the Jewish Labour Movement's national secretary and a councillor for Ealing - where Mr Merron says he is based - wrote on Twitter on Thursday that Mr Merron's postings were "disgusting."
He added he would take it up within the local party and complaining to Jennie Formby, the national party's general secretary.
In a statement, Ealing Labour denied Mr Merron was a local member and that it had referred the complaints against him to the national party.
The statement added: "Paul Merron does not work for Ealing Labour Party nor has he ever been formally employed by the Local Campaign Forum or the Labour Group of Councillors.
We have ascertained that he was asked to record an event held on the 2nd of June 2018 entitled 'The World in Turmoil' which was jointly sponsored by all three Constituency Labour Parties in the Borough.
"Given he was engaged for his work as a videographer, he was paid a one-off fee by the three CLPs for this piece of freelance work."
Asked if they were investigating Mr Merton, a Labour Party spokesperson said: "The Labour Party takes all complaints of antisemitism extremely seriously and we are committed to challenging and campaigning against it in all its forms.
"All complaints about antisemitism are fully investigated in line with our rules and procedures and any appropriate disciplinary action is taken."
The JC contacted Mr Merron for comment but recieved no response as this article went live.