Forest Heath: Michael Anderson, who was elected for the Conservatives in Severals ward, has left the party to join the West Suffolk Independent group. Meanwhile Reg Silvester, who was elected for the UK Independence Party in Brandon East ward, has joined the Conservative group.
Malvern Hills: Jill Campbell, who was elected as an Independent in Wells ward, has joined the Conservative group.
Medway: Michael Franklin, who was elected for the Conservatives in Luton and Wayfield ward, has left the party to sit as a non-party councillor. He has been suspended from the group over controversial tweets.
Mendip: Bryan Beha, who was elected for the Liberal Democrats in Street South ward, has joined the Conservative Party.
North Dorset: A husband and wife pair of councillors have left the Conservative group to sit as Independent councillors. They are Jackie Stayt (Blandford Old Town ward) and John Stayt (Riversdale and Portman ward).
Peterborough: Two councillors for Gunthorpe ward who were elected for the Liberal Democrats have joined the Labour Party. They are Darren Fower, who briefly sat as a Labour councillor in September 2017-January 2018, and Julia Davidson.
Poole: Philip Eades, who was elected for the Liberal Democrats in Branksome West ward, has left the party to sit as an Independent councillor.
Salford: Paul Wilson, who was elected for the Labour Party in Weaste and Seedley ward, has left the party to sit as an Independent councillor.
Sheffield: Steve Wilson, who was elected for the Labour Party in East Ecclesfield ward, has left the party to sit as an Independent councillor. He is the husband of Independent MP Angela Smith.
Spelthorne: Joanne Sexton, who was elected for the Conservatives in Ashford North and Stanwell South ward but left the party in February 2017, has now been readmitted.
Stoke-on-Trent: Mick Bell, who was elected for the UK Independence Party in Fenton West and Mount Pleasant ward, has left the party to join the City Independents group.
New vacancies
Braintree: Hedingham ward, after the resignation of Conservative councillor Joanne Beavis. Her term would have ended in May and so she will not be replaced in a byelection.
Durham: Shildon and Dene Valley division, after the death of Labour councillor Henry Nicholson. Term ends 2021.
Dundee: North East ward, after the death of Labour councillor Brian Gordon. Term ends 2022.
East Hampshire: Petersfield St Mary’s ward, after the resignation of Conservative councillor Nicky Noble. The term was due to end in May so no byelection will be held.
East Lothian: Haddington and Lammermuir ward, after the resignation of Conservative councillor Brian Smalls. Term ends 2022.
Havant: Hart Plain ward, after the death of Conservative councillor Gerald Shimbart. His term was due to end in May so no byelection will be held.
Havant: Purbrook ward, after the resignation of Conservative councillor Adam Christie. Term ends 2022.
Neath Port Talbot: Resolven division, after the death of Labour councillor and Cabinet member for Community Protection Des Davies. Term ends 2022.
Torridge: Winkleigh ward, after the resignation of Conservative councillor Betty Boundy. Her term would have ended in May so she will not be replaced in a byelection.
Weymouth and Portland: Tophill West ward, after the resignation of Conservative councillor Kerry Baker. Her term would have ended when the council is abolished in April so no byelection will be held.
Dates for byelections
Burnley: The byelection due in Rosehill with Burnley Wood ward will be held on 11 April.
Norfolk: The byelection due in Wroxham division will be held on 4 April.
Other updates
Brighton and Hove: The Conservative group has summoned a meeting next week to attempt to depose the Labour leadership of the council, which they now outnumber. However the Labour group secured passage of its budget this week through an ad hoc deal with the Green Party, making it unlikely the Conservatives will succeed.