The group declined to reveal the source of the advice. A spokesperson said: “We believe this is the right decision under the circumstances. I am unable to inform you of the venue and the independent advice except it was both from the US and UK.”
The organisers rejected any suggestion that slow tickets sales may have contributed to the decision. CUFI said it had expected it largest-ever attendance at the event – called A Night to Honour Israel – with approximately 1,000 tickets already sold at £10 each, with “a few hundred more” expected to be bought in the days leading up to the event,
The spokesperson said: “We were more than happy with the number of bookings, which was an increase on our previous events”.
Customers have been offered a full refund.
The inaugural Night to Honour Israel took place in 2015.
A pro-Palestinian event - the Palestine Expo organised by the Friends of Al-Aqsa – is expected to go ahead at the Queen Elizabeth II Centre in Westminster next month.