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Story summary
- Recent polling in Wales shows Reform UK leading with 30% in the May 2026 Senedd elections, a seven-point gain.
- Labour trails with 23% and Plaid Cymru 22%, a decline from Labour's previously strong position.
- The Caerphilly by-election is a critical test for Labour, with analysts saying a loss could undermine its governing capacity.
- The electoral system expansion will raise the Senedd from 60 to 96 members, complicating coalition possibilities.
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