 In 1973 Geliot 's WNO staging of Britten 's Billy Budd with Allen in the title role was presented on a Swiss tour , and two years later it was given in Barcelona . The company returned to London with its participation in the Amoco Festival of Opera at the Dominion Theatre in 1979 , presenting The Makropoulos Case , The Magic Flute , Ernani , Madame Butterfly , and Tristan and Isolde to capacity audiences . 
