A word in defence of Cameron (not someone I hugely admire): Matthew Goodwin relates that it was only the Tories who took serious note of the results of polling between 2001 and 2015 which showeds the drift of the Working Class away from Labour and the increasing dissatisfaction in response to wide questions such as, "In general how do you feel about your life / area / country".
Cameron might argue that the insights gained from that bank of evidence led him to believe that only a referendum would serve to lance the boil and that his misjudgment arose from the fact that the polling, if anything, underestimated dissatisfaction and that the E U (arrogantly, in my view) gave him nothing significant to help the Remain cause.
But rather than dissect the past, I'm interested to see who, if anyone, with passionate belief in the E U will commit themselves to the slog of organisation and campaigning on the issue.