"There seems to me little doubt that the councillors who were re-elected retained their seats because of the good work they have done for their constituents over the last four years."I'm not sure how you can have such confidence in your assertion. In Homefields, John Todd, a much respected councillor, stood alongside a new candidate, Jack Elmsley. According to your assertion, Councillor Todd might have expected to see his good work rewarded by a relatively better performance compared to the newcomer. In fact both candidates saw their vote share drop by 0.8%, Jack Elmsley's in comparison with his predecessor's.In Riverside, the one incumbent, Councillor Giles, saw her share of the vote drop by 3%, but the two newcomers also saw a 3% drop compared to the average of their two predecessors' share. In Turnham Green and Southfield, all six were incumbents, but there was the same variation in the change in their vote share as seen in the other two wards where there was a mixture of newcomers and incumbents. In fact if you look at the relative change in the candidates' vote share compared to the ward average for their party, the two largest drops of 0.27% each were for Councillor Biddolph, an incumbent who was elected, and Seb Wallace a newcomer who was not. I initially thought that incumbency played a significant role in this election. However, looking more carefully a major feature was the similarity in the relative performance of all three candidates in each ward compared to the ward swing, not the difference between incumbents and newcomers.The PollCat predictions grossly overestimated the Labour gains not only in Chiswick but in Wandsworth and the rest of London as well. You can't use them to conclude that the Conservatives did relatively well in Chiswick compared to the rest of London. As for Electoral Calculus, there are GE predictions at the ward level and have little value as council election predictors with quite different turnouts. For example they mark Southfields as Labour which was certainly not a feasible council prediction. I also think you must also have misread the Electoral Calculus tables as they show both Riverside and Homefields wards as voting Conservative at a GE, certainly not solid Labour.
Tom Pike ● 1597d