UK polling companies use samples of very poor quality. This was once again confirmed with the huge upset in the result of the EU referendum: 51.9% Leave to 48.1% Remain, where the market, bookmakers and pollsters were almost entirely betting on Remain. The geography and demography of the vote was largely as expected – London, university towns, Scotland and Northern Ireland voted Remain, the East of England, former Labour strongholds in the Northern England and South Wales voted Leave – with some unexpected Leave regions contributing to the final global balance (Birmingham, Southampton, Swansea, Canterbury and Watford)…