Torfaen: Abersychan division, after the death of Independent group councillor Raymond Williams. Term ends 2022.
Dates for byelections
In England, all current vacancies which do not fill a term ending in 2021 will be held on 6 May 2021, the ordinary day for local elections. The Cabinet Office has confirmed that local elections teams should not plan on this date being brought forward. In Wales, all byelections will be held in a period between 1 February and 16 April 2021.
Argyll and Bute: The byelection due in Isle of Bute ward will be held on 18 March.