The document summarizes a research project on the history of the Musicians' Union in the UK and industrial relations in the British music profession. Over the past 120 years, the MU has influenced policy and working conditions for musicians in three key areas: pay and conditions for musicians, performers' rights, and supporting musical events. While facing challenges from changes in employment law and the music industry, the MU has taken a pragmatic approach by negotiating with employers and providing services to members.