Plaid Cymru makes history winning Welsh parliament by-election in Caerphilly | BBC News

Plaid Cymru defeated Reform UK in the Welsh Parliament by-election for Caerphilly, with Labour coming third and suffering its first parliamentary defeat there for 100 years.

Plaid's candidate Lindsay Whittle won 47% of the vote with a majority of 3,848, in what was the 14th time he has stood for election.

The result saw a swing of 27% from Labour, which has held the seat in Westminster since the 1920s and in the Senedd since it began.

A former Caerphilly council leader who has been a councillor for almost 50 years, Whittle said: "We've beaten billionaire-backed Reform and, with the same determination, we can do it again in May 2026."

He also paid an emotional tribute to the late Caerphilly Member of the Senedd Hefin David, whose death had triggered the by-election, saying David's "kindness" was the "guiding spirit" of his campaign.

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Post from BBC News on October 24, 2025

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