On 6th September 1930, she made her professional debut in London at a Henry Wood Promenade Concert, playing Prokofiev's Piano Concerto No. 3. In 1934, for the Proms' 40th season, Joyce played Busoni's Indian Fantasy. She became one of the BBC's most regular broadcasting artists, as well as being in demand for concert tours in the provinces. Her recordings made her popular in the 1930s and 1940s, particularly during World War II. At her zenith she was compared in popular esteem with Gracie Fields and Vera Lynn.