Where did you get such detailed demographics for this secret ballot? Because all I have found is inferences and supposition. E.g. The New statesman meta analy

Where did you get such detailed demographics for this secret ballot? Because all I have found is inferences and supposition. E.g. The New statesman meta analysis http://www.newstatesman.com/politics/staggers/2016/06/how-did-different-demographic-groups-vote-eu-referendum http://www.newstatesman.com/politics/staggers/2016/06/how-di...