Mr Corbyn's handling of the row has led to claims that John McDonnell, the shadow chancellor, is waiting in the wings to launch an "organised takeover" as leader if Labour MPs launch a coup.

Sources claim an agreement has been struck between the two men in a bid to preserve the left-wing motives of Mr Corbyn's leadership.

It comes in the wake of a warning from Labour donor Michael Foster that no-one of Jewish faith has given money to the central party since Mr Corbyn took office because those around him "vilify" Jews and "shout down" people who attempt to defend Israel.

Mr Foster accused Mr Corbyn of having "ignored the issue" of anti-Semitism, adding: "I think I'm right in saying I don't think there is a Jew in Britain who has given money centrally to the party since Jeremy Corbyn's selection because prior to his selection and since his selection we have asked and asked for this to be dealt with."