Plaid Cymru claims Caerphilly seat as Labour overspends in by-election bid

Plaid Cymru’s Lindsay Whittle won the Caerphilly Senedd by-election, defeating Labour which spent about £98,000 but finished third; Reform UK was runner-up with around £96,000 spent, while Plaid spent about £46,900. Triggered by Hefin David’s death, the contest ended Labour’s long-held Caerphilly seat. Spending details included Airbnb staff accommodation bookings and advertising, with Labour's spend roughly £26.51 per vote.