By-election Set for Caerphilly Senedd Seat Following Hefin David's Death

A by-election for the Caerphilly Senedd seat has been scheduled for October 23, 2025, following the death of Welsh Labour Member Hefin Wyn David, who passed away on August 12 at the age of 47. Mr. David had served as the Member of the Senedd for Caerphilly since 2016 and was widely respected in the community, with tributes highlighting his dedication as a politician and a devoted father. The cause of his death remains unascertained pending toxicology results, with an inquest adjourned to April 2026. Plaid Cymru has announced Lindsay Whittle as its candidate for the by-election, aiming to offer a positive agenda for the area. Welsh Labour has held the Caerphilly seat since the Senedd's establishment in 1999, and the by-election will be conducted under the existing electoral boundaries and system. The election comes prior to a planned expansion and reform of the Senedd electoral system, which will increase the number of members and alter voting procedures in the next general election in May 2026.