Advised by the conductor Sir Thomas Beecham to become a soprano, Raisbeck studied with the tenor Dino Borgioli and from 1950 onwards she added Ortrud in "Lohengrin", Senta in "The Flying Dutchman", Third Norn in "Götterdämmerung" (all by Wagner), and First Lady in "The Magic Flute" to her repertory. Raisbeck was a tall, imposing woman and managed to appear the very embodiment of evil in that role. She often sang alongside her fellow Australian Kenneth Neate. After leaving Covent Garden in 1953, she sang frequently in concert, and was one of the huge choir at Westminster Abbey that sang during the Coronation of Queen Elizabeth II.