Methodology
More in Common polled around 1,000 people in each of the four mayoralties between 15-21 April. Respondents have been weighted to be representative of those mayoralties based on age/sex, education level, ethnicity, lower-tier local authority, and 2024 General Election vote.
To calculate the voting intention, the following turnout filter was applied: voters were only included in the headline voting intention if they gave their likelihood of voting in this mayoral election AND they said that they tend to vote in “most” or “every” local election.
Voters who said they do not know who they will vote for were asked a follow up question for how they would vote if forced to choose, and their votes were allocated accordingly.
In low-turnout elections, accurate polling requires a strong model to determine which voters will end up voting. Because people tend to overestimate their likelihood to vote in elections, this produces challenges and requires pollsters to make informed assumptions about how voters will behave. Using the tool below, you can explore how different turnout models change the forecasted results of each of these mayoral elections. (This tool is best viewed on desktop).