"For the 1975 D'Oyly Carte Centenary Celebration, Ayldon played all his principal bass-baritone roles as well as Phantis in "Utopia Limited" and the Prince of Monte Carlo in "The Grand Duke" (in concert).As part of the 1975 centennial season, before the first of the four performances of "Trial by Jury", a specially-written curtain raiser by William Douglas-Home, called "Dramatic Licence", was played by Peter Pratt as Richard D'Oyly Carte, Kenneth Sandford as Gilbert and Ayldon as Sullivan, in which Gilbert, Sullivan and Carte plan the premiere of "Trial" in 1875.