It was discovered after her death that she had released recordings by other pianists under her name to great acclaim.
Her performances were never critically beloved, with some critics wondering if her technical prowess was advanced enough for the music she was playing.
She premiered two Bourrées by Frederic Chopin in 1973 following their first publications.
She married British record producer William Barrington-Coupe in 1956, who was convicted of fraud in 1966.
Her husband was played by Rory Kinnear and Alfred Molina in the BBC biopic Loving Miss Hatto from 2012.