Michael Berkeley meets the rock legend Stewart Coleman, drummer with `The Police’ , and now a composer of operas and soundtracks, as well as songs. He recently provided music and narration for a spectacular production of `Ben Hur’ at London’s O2 arena. His musical tastes, all of which have influenced his own style, range from Wagner, Ravel and John Adams to Booker T, Paul Simon, and reggae from Desmond Dekker.