Playing with Black Cat Bones at the age of 15 he met drummer & future Free bandmate Simon Kirke.
Kossoff is best known for his work with English heavies Free (April 1968-72).
Amid session work, he followed with a solo release, 1973's Back Street Crawler, and the forming of the short lived Back Street Crawler in 1975.
He died 19 Mar 1976 from a drug-related heart problem on a flight from Los Angeles to New York.