Note: Interactive graphics and our estimates of house effects are updated as new polls are published.

Developments since the Last General Election

All Polls



House Effects

This graph displays the 'house effects' of the polling companies for each party. A positive house effect means that a pollster structurally estimates a certain party higher than the average pollster. The dot indicates the best estimate for the house effect (measured as percentage point differences), the lines display the 95% uncertainty margin.