Nucleus began it is long jazz-rock trip in 1969, when it had been originally formed by trumpeter Ian Carr. They drawn a following following a effective performance in the Montreux International Event in 1970, which resulted in the critical achievement of albums Elastic Rock and roll and We’ll DISCUSS It Later. Another members contains saxophonist Karl Jenkins, drummer John Marshall, and guitarist Chris Spedding. Spedding break up after the 1st two albums, however the remaining lineup lasted until 1972, when Jenkins and Marshall both remaining to join Smooth Machine. Belladonna was the 1st album with just Carr, and even though he enlisted assistance from guitarist Allan Holdsworth, the music group ultimately became a single endeavor for his music. They finally split up in the middle-’80s after many Carr-only albums.