[2] Leonard subsequently was a member of the BBC Singers, the Endymion Ensemble, and London Sinfonietta Voices.
She made her debut at La Scala, Milan, in 1989 in the premiere of Dr Faustus by Giacomo Manzoni.
[1][2] Leonard taught at the Central School of Speech and Drama and Fitzwilliam College, Cambridge.
In January 2013, the University of Hull awarded Leonard an honorary Doctor of Music degree.
[1] In the 2024 Birthday Honours list, Leonard was appointed a Member of the Order of the British Empire for services to music.