During the war Nash toured with the Carl Rosa Opera Company, often singing opposite the Australian soprano Joan Hammond. His roles included Faust, Pinkerton and Rodolfo. After the Royal Opera House reopened following its wartime closure, Nash sang Des Grieux and David. His last appearance at Covent Garden was in "Die Meistersinger" in April 1948. He continued to appear on stage until July 1958, when he reprised a character role that he had created a year earlier, Dr Manette in Arthur Benjamin's "A Tale of Two Cities" at Sadler's Wells. "The Musical Times" called it "a most moving performance".