Written for the first international trombone symposium in London, this concerto is a substantial twenty-minute piece in three movements, "Allegro," "Adagio," and "Presto." Because trombonist from the worlds of pop and jazz would attend the symposium as well as classical artists, Bourgeois decided to make his new concerto musically ecumenical, and it was deliberately tailored to have an appeal wider than the usual classical audience.