Here are the councils with the most “super-marginal” seats – contests where a pro-climate party (Green or Lib Dem) is within 50 votes of winning or holding the seat. Tactical voting in these seats could have the greatest impact for the climate on 7 May 2026.
Forecast vote shares (GB): Reform: 26.5% | Labour: 18.6% | Conservative: 18.5% | Green: 16.2% | Liberal Democrat: 12%
[Last updated: April 2026]
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