Croshaw studied initially with Harold Craxton through an award from the composer Arthur Benjamin and was later awarded a full scholarship to study at the Royal Academy of Music, London, with Vivian Langrish and Gordon Green. As a student she received many major awards and prizes culminating in the coveted Chappell Gold Medal
Croshaw has enjoyed a distinguished career as a solo pianist, chamber musician and accompanist. She has enjoyed partnering many eminent musicians in concerts at musical centres around the world, most notably Nathan Milstein, Alan Civil, Peter-Lukas Graf, Jacques Zoon, Michel Debost, Robert Winn, Antontio Janigro and in numerous chamber music groups including the Nash Ensemble. She has performed regularly at all the major venues in London (Wigmore Hall, Queen Elizabeth Hall, Purcell Room, Kings Place, Barbican) and festivals throughout Europe and North America including Cheltenham, Chelsea, Rye, Chichester, Edinburgh, Lichfield, Lisbon, Taormina and Bermuda.
Croshaw's critically acclaimed series of CDs of music by Hummel (two volumes), Weber, Czerny, Dussek and Moscheles with Meridian Records are frequently heard on BBC Radio 3 and Classic FM. Her latest CD for Meridian, of music by Camille Saint-Saëns, awarded 5* in Musical Opinion magazine, was released in June 2011 and a disc of piano music by Gabriel Faure will be released in 2013.
In recent years, she has devised and performed in 'Words and Music' concerts featuring some of the UK's most distinguished actors including Edward Fox, Sir Derek Jacobi, Charles Dance, Robert Powell, Prunella Scales and author and raconteur Sir John Mortimer.
She has been Professor of Piano, Chamber Music and Accompaniment for numerous years at Trinity College of Music, having previously taught at the Royal Academy of Music. She has also served on the teaching panels of the International Musician's Seminar (Prussia Cove) and for numerous years at the Oxford Flute International Summer School.
Among numerous awards she has received are an Associateship of the Royal Academy of Music and Honorary Fellowship of Trinity College of Music; also numerous awards and prizes for piano solo, chamber music and accompaniment.