Southend-on-Sea: Westborough ward, after the resignation of Labour councillor Charles Willis who has taken up a politically restricted job. Term ends 2023.
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. In Wales, all byelections will be held in a period between 1 February and 16 April 2021.