Warwick: John Sullivan, who was elected for the Labour Party in Warwick All Saints and Woodloes ward, has left the party to sit as an Independent councillor.
Greenwich: Mottingham, Coldharbour and New Eltham ward, after the death of veteran John Hills. Term ends 2026.
Hackney: Hoxton West ward, after the resignation of Labour councillor Yvonne Maxwell. Term ends 2026.
West Oxfordshire: Hailey, Minster Lovell and Leafield ward, after the resignation of Conservative councillor Colin Dingwall follwing his conviction for falsely claiming council tax reductions. His term was due to end next month so no byelection follows.
Dates for byelections
Birmingham: The byelection due in Kingstanding ward will be held on 30 May.
Highland: The byelection due in Tain and Easter Ross ward will be held on 13 June.