This prelude of carols and anthems will begin one half-hour before each Mass on Christmas Eve and Christmas Day. Repertoire will include Unto Us is Born a Son, David Willcocks; Gabriel's Message, Edgar Pettman; Ave Maria, Josquin des Prez; Once in Royal David's City, David Willcocks; Il est né, Traditional French; What Child is This, GREENSLEEVES; Tomorrow Shall Be My Dancing Day, John Gardner; What Sweeter Music, John Rutter.