Polling averages in individual states did make some mistakes , but up to around 5 points not 14 . Read again what i wrote please , I said individual polls were off by as much as 14 %. SeeIf we look at individual polls , there are some that were off by as much as 14 % My comment . And my question Or do you mean that 4 % for polling averagesDetermining the polling error for averages is rather hard . Long story short , you didn ' t read my comment and responded with a bunch of stuff that ' s mostly irrelevant . Noting that a 5 % error of polling averages is quite big fucking difference . And polling is equally likely to be overstating Labour ' s current support as it is to be understating it shudder . It depends on why they made the error in the first place , if it was due to random fluctuations and out of their control sure . Otherwise it ' s not about chance but about methodology . Note that polls overestimated both Conservatives and Labour equally 3 . 5 points during the GE . That wasn ' t what caused to big loss . TLDR Next time please read my comment and reply to something that ' s related . Even if almost all you say is completely true , it kinda misses the point .