For a few months at the height of the British invasion, Denny Laine was one of the most recognizable voices on the entire British music scene. As the lead singer on the Moody Blues' recording of "Go Now" -- a worldwide multi-million seller -- he stood out in a large pack, and did so splendidly. His soulful, agonized lead vocal performance, coupled with Mike Pinder's chiming piano, proved irresistable on the radio. Within a year, however, the band