Sky was an English-based progressive rock band, formed in 1978 when classical guitarist John Williams decided to team up with Herbie Flowers, Francis Monkman, Tristan Fry and Kevin Peek. After a protracted search for a record company, they eventually signed with the small European label Ariola Records. Their self-titled debut album was highly successful in Britain and Australia. Their follow up double album, Sky 2, was even more so being the tenth highest selling in Britain for all of 1980. The departure of Francis Monkman led to his replacement by Steve Gray, who took the band to a more jazz influenced area. Subsequent albums saw a gradual dwindling in quality and success. After their sixth album, Cadmium, John Williams too left the band. Sky were to record only two more albums; The Great Balloon Race and Mozart. The latter of these was produced with the Academy of St. Martin in the Fields, and was their most successful album in the United States.