In the JC last week, business leaders and rabbis backed Mr Cameron's campaign for Britain to stay in the EU.
Lord Livingston, the former BT chief executive, said: "I believe we should stay in the EU. If we left, there would be significant uncertainty for our exporters and potentially quite a lot of delay to provide new trade agreements to replace those we already have. I don't think that the EU stifles us - it's not perfect but the alternative is distinctly less perfect still, and more uncertain."
Rabbi Laura Janner-Klausner said: “As Jews, since the EU was set up, we've seen a level of civility in Europe that we've never seen before.”