Tony Bennett, Johnny Mathis, Bruce Forsyth and Jack Jones

John Wilson talks to singers Tony Bennett, Johnny Mathis, Jack Jones and Bruce Forsyth, whose careers began before rock and roll, and whose combined performing experience totals over 200 years. They reflect on the art of 'intimate singing', their inspirations, and the art of sustaining a career in a business which has changed radically over seven decades.Producer Jerome Weatherald.