The Labour Party has three separate “categories” of anti-Semitism but has “a lot of denial” that the problem exists, the founder of the Corbynite group Momentum has admitted.

Jon Lansman, who is himself Jewish, said Labour must do more to “stamp out” anti-Semitism in the party, though he said there is no “one size fits all” solution to the problem.

Mr Lansman, 60, has successfully shifted the Labour Party to the far Left by marshalling support for far-Left candidates in the general election, as well as backing Mr Corbyn’s leadership.

The party has been dogged by growing accusations of anti-Semitism under Mr Corbyn, who has in the past described the anti-Israeli militant groups Hamas and Hezbollah as “friends”. Speaking at the Limmud Festival of Jewish learning and culture in Birmingham, Mr Lansman said: “There is anti-Semitism in the Labour Party, I think it falls into three categories.

“There’s the kind of petty remarks about big noses, which are dreadful, completely unacceptable anti-Semitism. People make petty xenophobic remarks and some are made against Jews. I don’t think there’s much of that in Labour.

“There’s the anti-Semitism that arrives from the Israel-Palestine conflict. We all understand that when that conflict heats up, it results in dreadful anti-Semitism. It shouldn’t result in that, but it does.