- Performing Right Society (PRS)
 - Association of composers, songwriters, and music publishers that licenses music use in the U.K. and abroad. - Mechanical Copyright Protection Society (MCPS)
- Not-for-profit organisation which currently represents over 17,000 composers, songwriters, and music publishers. The MCPS licenses the recording and use of music, and collects royalties for its members.
- English Folk Dance and Song Society (EFDSS)
- Records and preserves English folk music, dance and song of the past, as well as the emerging folk traditions of today and the future.
- Incorporated Society of Musicians (ISM)
- Professional association for all musicians in the U.K., providing a complete backup service for professional performers, composers and teachers.
- Associated Board of the Royal School of Music
- Westminster - The ABRSM is a nonprofit organisation dedicated to teaching music to people all around the world.
- Serge Prokofiev Association, The
- Resource for fans and scholars of Prokofiev's life and his music. Events, recordings, articles, news, and more.
- London String Quartet Foundation
- Westminster - Promotes the discovery and development of talent and audiences for the string quartet.
- Royal Philharmonic Society
- Supports young musicians and composers, commissions music and performances, organises lectures, and owns an archive of manuscripts and scores accrued since 1813.
- Sydenham Music
- Lewisham - Part of the London Orchestras series.
- Royal Scottish Pipe Band Association - London and South of England Branch
- Kingston & District Chamber Music Society
- Kingston-upon-Thames - For amateur players in Southwest London.
- Music Tree
- Camden - Aims to make education, music, and music resources more accessible to young people in and around the borough of Camden.
- Sutton Acoustic Music Club
- Merton - Promotes folk events and meets on Sunday nights.
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