Sunderland: Washington South ward, after the impending disqualification of Independent councillor Paul Middleton (who was elected for the Labour Party). He has received a disqualifying suspended prison sentence. The seat will remain vacant as his term was due to end in May.
Dates for byelections
Aylesbury Vale: The byelection due in Haddenham and Stone ward will be held on 7 March.
Southampton: The byelection due in Coxford ward will be held on 14 March.