For the 1975 D'Oyly Carte centenary season, Sandford played all his principal baritone roles as well as King Paramount in the company's first revival of "Utopia, Limited" since the original production. Andrew Lamb, writing in "The Musical Times", thought him "outstanding" in the role. Sandford sang Ludwig in a concert performance of "The Grand Duke" in the same season. In addition, during that season, "Trial by Jury" was preceded by an original short play, "Dramatic Licence" by William Douglas-Home, in which Gilbert, Sullivan and Richard D'Oyly Carte plan the birth of "Trial" in 1875. Sandford played W. S. Gilbert in the playlet. He remained with the company for twenty-five years, ending on the company's last night, 27 February 1982.