 In 1951 she created the role of the Matron in the premiere of Brian Easdale's "The Sleeping Children" with the EOG in Cheltenham.In 1952 Vyvyan joined the roster of principal sopranos at the Sadler's Wells Opera, making a triumphant debut with the company as Konstanze in Wolfgang Amadeus Mozart's "Die Entführung aus dem Serail".She returned to that house later in the season to portray Donna Anna in "Don Giovanni".