Mr Bercow told them: “The importance of Jewish history, of Jewish culture, Jewish identity and indeed of Jewish security both physical and political can scarcely be overstated.
“The work you do is of an importance that cannot be exaggerated. I want you to know you have friends in Parliament here, and you certainly have a friend in this Speaker.”
He praised the WJC’s work in “fighting for the rights of Jews and Jewish communities across the world”.
Among the delegates was WJC president Ronald Lauder. Also present was Jonathan Arkush, the president of the Board of Deputies.
The executive committee of the WJC was in London to hold a week-long summit – the first in the UK capital for two decades.