Claire graduated with distinction from the Benjamin Britten International Opera School (BBIOS) at the Royal College of Music in 2003 before beginning her studies with Iris Dell'Acqua.

She made her Glyndebourne Festival Opera (GFO) debut in 2006 as Helena (A Midsummer Night's Dream). Other roles include: Tatyana (Eugene Onegin) for Riverside Opera, Opera by Definition and cover for GFO; Violetta (La Traviata), Gilda (Rigoletto) and Leïla (The Pearl Fishers) for Kentish Opera; Mimì (La Bohème) for Garden Opera, Opera Box and cover for Glyndebourne Opera on Tour (GOT); Governess (Turn of the Screw) (cover) for GFO and GOT; Lauretta (Gianni Schicchi) (cover) for GFO; Countess (The Marriage of Figaro) for Opera Project and Surrey Opera; Helena (A Midsummer Night's Dream) for Longborough Festival Opera; Karolka (Jenufa) (cover) for GFO; Annina (La Traviata) (cover) for GOT; Older Sister (Pig - Jonathan Dove) for Glyndebourne Jerwood Scheme; Rosalinde (Die Fledermaus) for Opera Box and Clonter Opera; Lady Harriet (Martha) for Northampton Festival Opera and Opera South; Solo Soprano Fisherwoman (Peter Grimes) for Salzburg Easter Festival/Berlin with Sir Simon Rattle and the Berlin Philharmonic; First Lady (Die Zauberflöte), and Lady Billows (Albert Herring) directed by Sir Thomas Allen, both for the BBIOS; Daughter of Zion (Brockes Passion) for the London Handel Society.

Concert performances include: Korngold Das Wunder der Heliane and Mahler Das Klagende Lied both with the London Philharmonic Orchestra/Vladimir Jurowski (Royal Festival Hall); Schumann Das Paradies und die Peri with the Orchestra of the Age of Enlightenment/Sir Simon Rattle (Royal Festival Hall, Théâtre des Champs Elysées, Paris; Lingotto, Turin; Béla Bartók Concert Hall, Budapest); Beethoven Missa Solemnis with London Mozart Players/Andrew Parrott (Wells Cathedral); Mahler Symphony No. 2 (London); Strauss Vier Letzte Lieder (London); Poulenc Gloria (Bath); Brahms Requiem (Czech Republic); Haydn Harmoniemesse; Rachmaninov The Bells with The Royal Choral Society/Richard Cooke (Canterbury Cathedral); Handel Judas Maccabaeus (St John's, Smith Square); a recital of Strauss Lieder (St-Martin-in-the-Fields); a recital for the Two Moors Fesitval and Raymond Gubbay Last Night of the Spring Proms Concerts (venues include Symphony Hall and Bridgewater Hall).