Plot: BBC-2 presents a performance of William Walton's dramatic oratorio. Conducted by John Pritchard with Raimund Herincx (baritone) BBC Chorus, BBC Choral Society, Alexandra Choir, Goldsmiths' Choral Union, Harrow Choral Society, London Philharmonic Choir, Royal Choral Society BBC Symphony Orchestra Leader, Trevor Williams Before the performance Sir William Walton talks to John Warrack about the work and its origins