North West Leicestershire DC, Long Whatton & Diseworth – 1 October 2026
Conservative seat. Cause: Death
Liberal Democrat candidate: Ian Bradley
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Northumberland UA, Amble – 1 October 2026
Reform UK seat. Cause: Death
No Lib Dem candidate
Blackpool MBC, Claremont – 1 October 2026
Labour seat. Cause: Death
Lib Dem candidate: Kevan Benfold
Stirling UA, Forth & Endrick – 1 October 2026
Conservative seat. Cause: Death
Lib Dem candidate: James MacLaren
Northumberland CC, Hirst – 1 October 2026
Independent (elected as Reform) seat. Cause: Disqualification
Lib Dem candidate: Calvin Clark
Highland UA, Wick and East Caithness – 1 October 2026
Independent seat. Cause: Resignation
Lib Dem candidate: Julie Calder
Aberdeen UA, Rosemount/Midstocket – 8 October 2026
SNP seat. Cause: Death
Lib Dem candidate: Sandy Stephen
Amber Valley DC, Kilburn, Denby, Holbrook & Horsley – 8 October 2026
Conservative seat. Cause: Resignation
No Lib Dem candidate
Newcastle-under-Lyme BC, Town – 8 October 2026
Reform UK seat. Cause: Resignation
Lib Dem candidate: Morgan Inwood
Lambeth LBC, Myatt’s Fields – 8 October 2026
Labour seat. Cause: Death
Lib Dem candidate: Christopher French
Stroud DC, Rodborough – 13 October 2026
Labour seat. Cause: Resignation
Lib Dem candidate: George James
Flintshire CC, Higher Kinnerton – 15 October 2026
Independent seat. Cause: Resignation
No Lib Dem candidate
Leicestershire CC, Shepshed – 15 October 2026
Reform UK seat. Cause: Resignation
Lib Dem candidate: Katy Brookes Duncan
Mid Devon DC, Bradninch – 15 October 2026
Lib Dem seat. Cause: Resignation
Lib Dem candidate: Mary Ryan
Wiltshire Council, Salisbury Milford – 15 October 2026
Lib Dem seat. Cause: Resignation
Lib Dem candidate: Mac Macintyre Brown
South Kesteven DC, Grantham St. Wulfram’s – 22 October 2026
Independent seat. Cause: Resignation
East Hertfordshire DC, Hertford Kingsmead – 22 October 2026
Green Party seat. Cause: Resignation
Leeds City Council, Calverley and Farsley – 22 October 2026
Labour seat. Cause: Resignation
Carmarthenshire Council, Saron – 22 Ocotber 2026
Labour seat. Cause: Death
Argyll and Bute Council, Mid Argyll – 29 October 2026
Independent seat. Cause: Death
Newark and Sherwood DC, Dover Beck – 29 October 2026
Conservative seat. Cause: Death
Nottinghamshire CC, Southwell – 29 October 2026
Conservative seat. Cause: Death
Bassetlaw DC, Worksop East – 29 October 2026
Labour seat. Cause: Resignation
Halton BC, Beachwood and Heath – 29 October 2026
Lib Dem seat. Cause: Death