BBC Studio opera broadcasts included Beatrice and Benedict, Berlioz; Fenemore and Gerda, Delius; Hugh the Drover, Vaughan Williams; Die Abreise, D'Albert.
BBC Television appearances included Anne Page in the Merry Wives of Windsor and Nella in Gianni Schicchi with Tito Gobbi.
Sinclair married Leon Charin, a chartered electrical engineer in 1954, with whom she had one son, Joel and one daughter, Elizabeth.
[1][2] Sister Constance in the British premiere of The Dialogues of the Carmelites, Covent Garden, 1958, in the presence of François Poulenc.
BBC Promenade Concerts premieres of Midsummer Marriage, Tippett, 7 August 1963; Dixit Dominus HWV 232, Handel, 18 September 1964; Moses und Aron, Schoenberg, 19 July 1965.