THIS ARTICLE IS BEST VIEWED AT SOURCE AS I CAN'T REPLICATE THE GRAPHICS HERE:- https://www.electoralcalculus.co.uk/pseph_pollerror_20190723.html There is a disagreement between pollsters about how well the Labour party is doing. Among the established and respected major pollsters, there are two camps. One group thinks that Labour is doing relatively well and will get more votes than any other party. But the other thinks Labour is doing less well and is in third or fourth place. Curiously, the first group consists of all but one of the major pollsters, while the second consists of YouGov alone. We can see the difference by looking at recent polls from both YouGov and non-YouGov pollsters. A poll-of-polls of four recent polls from non-YouGov pollsters (ComRes, Survation, Opinium, Ipsos-MORI) is shown on the left, along with the Electoral Calculus seat prediction. On the right is a poll-of-polls for four recent YouGov polls. In the first scenario, Labour is...