The Spontaneous Music Ensemble (SME) was a loose collection of free improvising musicians, convened in 1965 by the now late South London-based jazz drummer/trumpeter John Stevens and alto and soprano saxophonist Trevor Watts. SME performances and recordings could range from Stevens–Watts duos to gatherings of more than a dozen players.
George Lowen Coxhill known professionally as Lol Coxhill, was an English free improvising saxophonist. He played soprano and sopranino saxophone.
John William Stevens was an English drummer, and a founding member of the Spontaneous Music Ensemble.
Evan Shaw Parker is a British tenor and soprano saxophone player who plays free improvisation.
Louis Tebogo Moholo, is a South African jazz drummer. He has been a member of several notable bands, including The Blue Notes, the Brotherhood of Breath and Assagai.
Paul Lovens is a German musician. He plays drums, percussion, singing saw, and cymbals. He has performed with the Aardvark Jazz Orchestra and Berlin Contemporary Jazz Orchestra.
Irène Schweizer is a Swiss jazz and free improvising pianist. She was born in Schaffhausen, Switzerland.
Barry John Guy is an English composer and double bass player. His range of interests encompasses early music, contemporary composition, jazz and improvisation, and he has worked with a wide variety of orchestras in the UK and Europe. He studied at the Guildhall School of Music under Buxton Orr, and later taught there.
Emanem Records is a record company and independent record label founded in London, England in 1974 by Martin Davidson and Madelaine Davidson to record free improvisation.
Paul William Rutherford was an English free improvising trombonist.
Paul Dunmall is a British jazz musician who plays tenor and soprano saxophone, as well as the baritone and the more exotic saxello and the Northumbrian smallpipes. He has played with Keith Tippett and Barry Guy.
Maggie Nicols, is a Scottish free-jazz and improvising vocalist, dancer, and performer.
Pierre Favre is a Swiss jazz drummer and percussionist born in Le Locle, Switzerland.
Philipp John Paul Wachsmann is an African avant-garde jazz/jazz fusion violinist born in Kampala, Uganda, probably better known for having founded his own group Chamberpot. He has worked with many musicians in the free jazz idiom, including Tony Oxley, Fred van Hove, Barry Guy, Derek Bailey and Paul Rutherford, among many others. Wachsmann is especially known for playing within the electronica idiom.
Paul Lytton is an English free jazz and free improvising percussionist.
John Howard Riley is an English pianist and composer, who worked in jazz and experimental music idioms.
Thomas Henry Lowther is an English jazz trumpeter who also plays violin.
Larry Stabbins is a British jazz saxophonist, flutist and composer.
Veryan Weston is a British pianist active in free improvisation, jazz, and rock music. He has worked with Lol Coxhill, Eddie Prévost, Trevor Watts, Caroline Kraabel and Phil Minton.
Hannah Marshall is a British experimental and free improvising musician and composer.
