 He created Claggart in Britten's Billy Budd (1962).In 1966 he sang at the Teatro Colón, Buenos Aires.He sang extensively for Welsh National Opera, roles including King Philip in Verdi's Don Carlo, Mozart's Don Giovanni (a wonderfully seedy characterization), the title role in Boris Godunov and Fiesco in Verdi's Simon Boccanegra.Grove says he had "a dark, expressive voice, evenly produced and capable of subtle characterization."