He tweeted this morning: “Another big day in Parliament today with first General Debate on antisemitism.
“Sincerely hoping @jeremycorbyn will make time to at least listen to, if not speak about, this important issue #EnoughisEnough”
Activists also drove three large billboards past Westminster and Labour headquarters in central London ahead of the debate.
The three billboards carried the messages: “Holocaust deniers harboured by Labour”, “failure to act on antisemitism” and “Institutional antisemitism in Corbyn’s Labour”.
Mr Corbyn has said he is acting against anti-Semitism within Labour ranks.