Challenger Parties in Power Locally

Abstract

This report examines the experience of ‘challenger parties’, political parties without previous experience of government, on entering power in local government. It examines the experiences of challenger parties in English local government following electoral gains in May 2025, focusing on how Reform UK and the Green Party of England and Wales have adapted to executive roles. Evidence from multiple case studies shows that, rather than transforming local governance, these parties have generally worked within existing institutional frameworks, with some early disruption typically giving way to learning and stabilisation as members adjust to formal procedures and constraints.