The website of the Labour Party's Bristol branch was hijacked by someone declaring war on Jeremy Corbyn

The website of a Labour Party branch based in Bristol has been taken over by an unknown activist who has launched an astonishing attack on Jeremy Corbyn, his allies, and the left-wing grassroots organisation Momentum.

The Labour Bristol site was transformed by someone who claims to be exposing the “truth” about Corbyn and Momentum. The site now advocates Saving Labour — the group campaigning for Corbyn to be replaced by Owen Smith in the upcoming leadership contest.

The site accuses Corbyn of deception for posing as a champion of the working-class even though he attended private school as a child and grew up in a “manor” during his youth. They also accuse the current Labour leader of being a “career politician” and “ill-equipped” to lead both the party and the nation.

You can read the website’s claims about Corbyn below.

The updated Bristol Labour website also makes some accusations regarding the behaviour and practices of the Momentum grassroots movement (see below). Momentum was set up to support Corbyn as he rose to the top of the party last year.

The website claims Momentum is an “unaccountable” and “undemocratic” collection of private companies owned by pro-Corbyn activist John Lansman, which isn’t transparent about where membership money goes. It also accuses the organisation of breaching Data Protection law by harvesting peoples’ personal information.

The site also called Momentum national organiser James Schneider and Lansman for being “elitists from privileged backgrounds” who are falsely portraying themselves as “anti-establishment” voices.

A line of text at the bottom of the page clarifies that the website domain was formerly loaned to the official Bristol Labour branch, but is now being used by the person controlling the site to publicise an anti-Corbyn agenda.

“The domain was being loaned to the Bristol Labour party. Repeated efforts to get them to take ownership of the domain failed. With the current situation, I am no longer inclined to keep loaning it to them. I will likely re-purpose this domain for Bristol based Labourers information.”

A source in Momentum who wished not to be named told Business Insider who the person behind the takeover is, but we were unable to immediately confirm this.

Business Insider contacted Momentum and Jeremy Corbyn’s office for comment but both declined. Saving Labour and John Lansman were not immediately available for comment.

NOW WATCH: A Scottish MEP’s EU remarks just got him a standing ovation

NOW WATCH: Briefing videos

Business Insider Emails & Alerts

Site highlights each day to your inbox.

Follow Business Insider Australia on Facebook, Twitter, LinkedIn, and Instagram.