https://www.theguardian.com/uk-news/2025/oct/24/plaid-cymru-wins-caerphilly-byelection-result

Rhun ap Iorwerth’s party seizes Senedd seat after Reform UK challenge
Plaid Cymru has won the Caerphilly byelection in south Wales, a dramatic result signalling a sharp realignment in Welsh politics with repercussions for the whole of Britain.
Rhun ap Iorwerth’s party, which wants Wales to become independent, seized the Senedd (Welsh parliament) constituency from Labour and resisted a fierce challenge from Reform UK.
Plaid candidate Lindsay Whittle received 15,961 votes, while Reform UK’s Llyr Powell won 12,113. Labour’s vote collapsed in what had been a stronghold, with its candidate Richard Tunnicliffe polling only 3,713 votes.
Plaid emerged with a majority of 3,848 votes, and a swing of almost 27% from Labour.
In his acceptance speech, Whittle … said: “There is deep, deep disillusionment with Labour, both on a UK level and at a Welsh government level, and the people are looking for new leadership. A Plaid Cymru win here tonight is the clearest evidence yet of who is in the driving seat to lead [Welsh] government for next year. I don’t think Reform have shown they are particularly interested in Wales. It’s all about getting [Reform leader] Nigel Farage to Downing Street.”
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https://www.theguardian.com/uk-news/2025/oct/24/plaid-cymru-wins-caerphilly-byelection-result