Since the 2025 local elections, 78 council by-elections across the UK have resulted in notable shifts among political parties. The Reform Party (RFM) gained 22 seats, increasing their total to 25, while the Liberal Democrats (LDM) secured 5 additional seats, reaching 23. The Conservative Party (CON) lost 6 seats, holding 11, and Labour (LAB) experienced a decline of 16 seats, now at 8. The Green Party (GRN) gained one seat, totaling 5, and Independents (Ind) decreased by 2 to 3 seats. Other parties including the Scottish National Party (SNP), Plaid Cymru (PLC), and local groups saw minimal changes. Key by-election results include Reform gains from Labour in Stocksbridge and Upper Don (Sheffield) with 32.9%, from Conservative in Tower (Suffolk) with 28.8%, and from Independent in Northway (Tewkesbury) with 41.4%. The Liberal Democrats held several seats such as Crediton Lawrence (Mid Devon) with 64.9% and Woking South (Surrey) with 63.8%. Conservatives held Great Wyrley Landywood (South Staffordshire) with 48.7% but lost Buckshaw and Whittle (Chorley) to Reform. Labour held Bedwell (Stevenage) with 43.2% but lost multiple seats to Reform and Conservatives. Independents notably gained Calverton (Gedling) with 66.3%. Estimated turnouts varied, often around 20-40%, with some wards showing declines compared to previous elections. These results indicate a growing presence of the Reform Party at the expense of Labour and Conservatives, alongside steady Liberal Democrat performances and some gains by Independents and Greens.