Isotope was a British jazz-rock band based around guitarist Gary Boyle. Boyle founded the band in June 1972 and a first album, Isotope, was largely composed by keyboardist Brian Miller. Jeff Clyne was on bass and Nigel Morris was on drums. However, Clyne and Miller left in 1974 to be replaced by Hugh Hopper and Laurence Scott (b. 7 Feb 1946) respectively. After touring, this new line-up recorded Illusion. Boyle subsequently focused on a solo career.