[5] The Labour councillor for Oscott Keith Linnecor died in February 2020, having served on the council for 25 years.

[6][7] Labour councillors for Billesley and Hall Green North, Lucy Seymour-Smith and Lou Robson, resigned.

[10] The Liberal Democrat candidate Deborah Harries successfully defended his seat in the October 2021 by-election.

The Labour candidate Paulette Hamilton won the by-election held to fill the seat in March, with an increased share of the vote.

[14] The Liberal Democrats pledge to quadruple speed cameras, propose funding for up to 400 "walking bus conductors" and look to devolve the powers and resources of the council to more localised groups.

[30] The Bournbrook and Selly Park by-election was triggered by the resignation of Labour councillor Brigid Jones.

The Kings Norton North by-election was triggered by the resignation of Labour councillor Alex Aitken.