Electorate: 77,282
Siobhain McDonagh is the MP for Mitcham and Morden. Check out Siobhain McDonagh's Record on Climate.
Based on the latest opinion polls, VoteClimate estimates that if a general election happened today, the result in Mitcham and Morden would be as follows.
This constituency projection is based on the following national vote shares (GB): Labour: 25.4% | Reform: 23.3% | Conservative: 19.9% | Green: 11.7% | Liberal Democrat: 10.4%
[Last updated: September 2026]
For our full forecast of the next general election, please see our Electoral Analysis.