Stockport: Laura Booth, who was elected in Offerton ward for the Liberal Democrats, has left the party to sit as an Independent councillor.
Swale: The eight-member UK Independence Party group has reorganised as the Swale Group. Some of its members remain members of UKIP nationally while others have left the party, but the group remains unified on the council.
Bristol: Westbury-on-Trym and Henleaze ward, after the resignation of Liberal Democrat councillor Clare Campion-Smith, due to ill health. Term ends 2020.
Horsham: Cowfold, Shermanbury and West Grinstead ward, after the death of Conservative councillor Roger Clarke. Term ends 2019.
Date for byelection
Waverley: The byelection due in Farnham Castle ward will be held on 24 May.