He has played in various duos,quartets and quintets with fellow musicians Evan Parker, Elton Dean, John McLaughlin, Keith Tippett, Tony Oxley, Barry Guy, Barbara Thompson, Art Themen and John Stevens.

Recorded in the early eighties and originally issued on Affinity, 'In Focus' finds a maturation in the music of the duo from their debut album 'First Encounter'. None of the music is rehearsed or scored, as it is shaped and generated by the musicians as they play, highlighting why Riley and Tippett are two of Britain's most significant performers and composers working within the Free Jazz Movement.