Mr Stern wrote: “We will be holding a protest from Charedi Jews outside the dinner to voice that BoD do not represent 50, 000 Charedi Jews. Please can you give me the full address of the dinner?
“Please be assured that it will be a peacful protest and I'm more than happy to meet you so we can work together on making sure that it all runs well.”
The Board responded by condemning “divide and rule” tactics of a “small group of malcontents”.
A spokesman for the Board of Deputies added: “The Charedi community has had no better ally than the Board of Deputies in standing up for their rights in the fields of coroner reform, education and welfare, and that is appreciated by most leaders in the Charedi community. They should be protesting against antisemitism, not against attempts to fight it.”
The original pro-Corbyn letter signed by the Charedi Rabbis, which railed against “those who are spreading reports that the Jews in Britain are united against” the Labour leader, caused a rift in the Charedi community, with some arguing that the rabbis were misled as to its content.
Mr Stern and Mr Friedman denied this, insisting that some of the rabbis even made their own amendments. A number of rabbis later confirmed to the JC they had read and signed it.
Last week, the pair also accused the Board and the Jewish Leadership Council (JLC) of “chutzpah”, saying they “only represent a very particular part of Jews who are pro-Israel”.
The Board announced earlier this month that Sadiq Khan, the Mayor of London, will be the guest of honour at its 2018 dinner, on November 5.
An earlier version of this article stated Rabbi Avrohom Pinter and Rabbi Herschel Gluck had met Jeremy Corbyn to say Labour should not have adopted the IHRA definition of antisemitism. We accept this was incorrect and apologise to Rabbi Pinter and Rabbi Gluck.