Unrelease befor recordings dated 1972 and 1980. The London Jazz Composers Orchestra began back in 1970. The idea of a composers' orchestra, a large formation equally defined by the concepts of composition or intervention and by the improvised creative genius of the participating musicians, developed an amazing self-impetus. It was this energy, which proved to be greater than the arithmetic sum of the participants, that encouraged Barry Guy and the orchestra to drive idea and practice even further