The Ralph Vaughan Williams Society: https://rvwsociety.com/ Widening the understanding & appreciation of the music of Ralph Vaughan Williams
Thames Valley Early Music Forum: https://www.tvemf.org/ Early music workshops and events for singers and musicians in the Thames Valley area
Friends of Cathedral Music: https://www.cathedralmusictrust.org.uk/ Campaigning on behalf of cathedral music, supporting choirs and choristers in need, and encouraging the pursuit of excellence in choral and organ music.,
The Royal School of Church Music: https://www.rscm.org.uk/ committed to achieving the best use of good music in worship.
The Harsnett Choir: https://www.harsnettchoir.org/ A non-geographical choir, singing services at cathedrals several times a year, with a week in residence during the summer (a crash course in cathedral singing!)
The R C Sherriff Trust: https://www.rcsherrifftrust.org.uk/ An independent charitable trust with the aim of advancing and developing the arts in the Borough of Elmbridge in Surrey.