Jeremy Corbyn has been accused of failing to act over allegations of antisemitism within Labour

Activists defending Jeremy Corbyn from allegations of antisemitism have shared cut and pasted backstories claiming that they are the children of Holocaust survivors.

Several Twitter accounts sticking up for the Labour leader have posted comments describing histories including being the son of a survivor “who lost 39 members of her family in the camps”.

The owners of the accounts argue that this background allows them to reject allegations of antisemitism against Mr Corbyn, or to be offended by them. The tweets use phrasing almost identical to that used in posts by Andrew Feinstein, a South African film-maker and former politician who now lives in London. His account is not disputed.

After Matt Hancock, the health secretary, called Mr Corbyn antisemitic this month, Mr Feinstein tweeted: