Analysing the September 2025 YouGov MRP
Last week YouGov released the latest iteration of their MRP (Multi-level Regression and Post-stratification) survey. For anyone not aware, this is a survey combining data from 13,000 voters and demographic data to predict all the seats in Great Britain (except for the Speaker’s seat of Chorley). YouGov have had splendid success with their MRP and correctly called 92% of seats at the 2024 election (also helping my betting returns). That said, we should point out a couple of caveats as…