Story perspectives

YouGov Forecasts Plaid Cymru, Reform UK Toppling Labour

5/8/2026

Summary

Story summary

YouGov’s MRP model projects Plaid Cymru 43 seats and Reform UK 34 seats in the May 7, 2026 Senedd election, making frontrunners to end Labour’s 27-year rule.
Mick Antoniw says outcome reflects voter frustration with issues such as immigration and may force Prime Minister Keir Starmer to consider stepping down.
Eluned Morgan’s seat is vulnerable and Labour sources note Prime Minister Keir Starmer performed poorly with voters despite praise for handling Iran.

History

Historical Context

On 1 May 1997 Tony Blair’s Labour Party won 418 Commons seats—a 179-seat majority that ended 18 years of Conservative rule and gave Labour 34 of Wales’s 40 seats, wiping out the Tories there for the first time since 1906. A YouGov 2026 projection of Plaid Cymru gaining 43 Senedd seats and Reform UK 34 suggests a comparable realignment challenging Labour’s three-decade dominance in Wales.

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Story summary

YouGov’s MRP model projects Plaid Cymru 43 seats and Reform UK 34 seats in the May 7, 2026 Senedd election, making frontrunners to end Labour’s 27-year rule.
Mick Antoniw says outcome reflects voter frustration with issues such as immigration and may force Prime Minister Keir Starmer to consider stepping down.
Eluned Morgan’s seat is vulnerable and Labour sources note Prime Minister Keir Starmer performed poorly with voters despite praise for handling Iran.

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