Last night's post-debate polls by YouGov showed a narrow Johnson win.



Johnson 52%

Corbyn 48%



Good news for Johnson, right? Well... no.



Let's look into the raw data and uncover some key points hidden by the headline numbers.



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Firstly, who took part in the poll?



We have a sample of 1322 people, weighted to 2017 voting intention, EU voting intention, etc.



Looking at the numbers, Leavers however may have been over-weighted and 18-24's under-weighted. This will make the sample lean toward Con.



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