 On 8 June 1953 she made her Royal Opera, London debut as Lady Penelope Rich in the world premiere of Britten's "Gloriana", a production organised by the EOG.She sang in another EOG production for her debut at La Fenice on 14 September 1954; this time The Governess in the premiere of Britten's "The Turn of the Screw".Vyvyan sang in many more world premieres during her career, including Tytania in Britten's "A Midsummer Night's Dream" (Aldeburgh Festival, 1960), the Countess de Serindan in Malcolm Williamson's "The Violins of Saint-Jacques" (1966, Sadler's Wells), various roles in Williamson's "Lucky-Peter's Journey" (1969, Sadler's Wells) and Mrs. Julian in Britten's "Owen Wingrave" (1971, BBC television).