Stockport: Laura Booth, who was elected for the Liberal Democrats in Offerton ward but left them in April, has now been accepted into the Labour group. She was first elected as a Labour councillor in 2012, defecting to the Liberal Democrats in October 2014 and subsequently being re-elected under her new colours.
Cornwall: Newquay Treviglas division, after the death of Liberal Democrat councillor Paul Summers. Term ends 2021.
West Somerset: Alcombe ward, after the resignation of Independent councillor Adrian Behan, who was elected for the UK Independence Party. Term ends 2019.
Dates for byelections
Lichfield: The byelection due in Curborough ward will be held on 5 July.
West Somerset: The byelection due in Alcombe ward will be held on 21 June.