Voted in the top twenty All Time World Greatest Baritone Saxists in Japanese Encyclopaedia of Jazz.
His ensemble, called the Siger Band, included Paul Rutherford, Pete McPhail, Tony Moore, and Nigel Morris.
He founded Slam Records in 1989 to issue his own music; the label also releases material by Steve Lacy and Mal Waldron, among others.
During this time his collaborations included work with Lol Coxhill, Paul Hession, Laszlo Gardony, Ruben Ferrero, and Evan Parker.
Haslam founded the British Saxophone Quartet in 1992, with Paul Dunmall, Elton Dean, and Simon Picard rounding out the membership.