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). She also premiered Arthur Bliss's "The Beatitudes" in the 1962 festival for the opening of Coventry Cathedral, and gave the first UK performance of Britten's "Cantata Academica" in 1961 as well as the UK premiere of Poulenc's" Les Mammelles de Tiresias" (Aldeburgh 1958). Britten's spelling change to use Tytania in "A Midsummer Night's Dream" rather than Shakespeare's Titania was a tribute to Vyvyan.