Gosport BC, Bridgemary – 15 January 2026
Liberal Democrat seat. Cause: Death.
Liberal Democrat candidate: Stephen Marshall.
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York City Council, Heworth – 15 January 2026
Labour seat. Cause: Resignation.
Derbyshire CC, Horsley – 20 January 2026
Reform UK seat. Cause: Resignation.
Amber Valley BC, Codnor, Langley Mill and Aldercar – 20 January 2026
Labour seat. Cause: Resignation.
Fife Council, Glenrothes West & Kinglassie – 22 January 2026
SNP seat. Cause: Resignation.
Cheshire West and Chester Council, Willaston and Thornton – 22 January 2026
Conservative seat. Cause: Death.
Liberal Democrat candidate: Carol Anne Braithwaite.
Flintshire County Council, Leeswood – 22 January 2026
Labour seat. Cause: Death.
Cotswolds DC, The Rissingtons – 22 January 2026
Green Party seat. Cause: Resignation.
South Norfolk DC, Central Wymondham – 22 January 2026
Conservative seat. Cause: Resignation.
Calne TC, Calne Central – 22 January 2026
Liberal Democrat seat. Cause: Resignation.
East Dunbartonshire Council, Bearsden South – 29 January 2026
Conservative seat. Cause: Disqualification.