Mayoral poll based on just 240 voters
How much can you trust a survey with such a small sample? The detailed data on YouGov’s London mayoral survey is out today and there are two things to highlight – the survey took place AFTER the controversial Channel 4 Dispatches programme last Monday but the size of the sample was just about the smallest that I can recall from the firm. In their normal national voting intention surveys YouGov generally involve about 2000 people. The figure for Saturday’s Daily…