Labour faced a significant defeat in its traditional Welsh strongholds, falling to third place in the Caerphilly Senedd by-election. Experts analyzing the polls expressed concerns about the party’s future performance in the upcoming May 2026 Welsh Parliament elections.
Plaid Cymru secured a decisive victory in Caerphilly, obtaining a lead of 3,848 votes and a substantial swing of nearly 27% from Labour. The voter turnout exceeded 50%, with Plaid capturing 47% of the vote share, surpassing Nigel Farage’s Reform UK at 36%.
Labour, which had held the Caerphilly seat since its inception in 1999, found itself in a distant third place with only 11% of the votes. The Conservative candidate received 690 votes, while the Green Party and Liberal Democrats garnered 516 and 497 votes respectively. Despite a strong campaign effort, Reform failed to clinch the Welsh seat.
Following the defeat, First Minister Eluned Morgan acknowledged the challenging circumstances of the by-election and thanked their candidate, Richard Tunnicliffe. She congratulated Lindsey Whittle on his win and emphasized a commitment to address the community’s call for quicker change.
Nick Thomas-Symonds, a Welsh Labour MP, acknowledged the tough road ahead for the party in the upcoming Senedd elections against Plaid. He recognized the disappointment of the loss and highlighted the need to accelerate the pace of change based on feedback from constituents.
Polling expert Sir John Curtice indicated that Plaid was well-positioned to potentially secure the next First Minister role in Wales. He noted Reform’s disappointment and its consistent polling performance on a national level.
Plaid Cymru’s leader, Rhun ap Iorwerth, hailed the victory in Caerphilly as a choice for hope and progress over division. He emphasized Plaid’s vision for Wales and the party’s commitment to delivering meaningful change for the constituency.
In conclusion, the results of the by-election signal a shift in Welsh politics, with Plaid Cymru emerging as a formidable choice for voters seeking new leadership and a promising future for Wales.