Catherine began playing the harp at the age of eight, and attended the Royal College of Music Junior Department with Daphne Boden and later gained a scholarship to the Royal Academy of Music. Catherine then completed her studies at the Conservatoire Superieur de Music in Lyon with Fabrice Pierre. She is an extremely enthusiastic chamber musician and has performed across Europe and in Japan with numerous distinguished artists such as Quatuor Debussy, Francois Le Roux, the Chamber Orchestra of Europe and the Lindsay Quartet. Catherine has given solo recitals at the Wigmore Hall, Purcell Room, Fairfield Halls and St Martin-in-the-fields and in September 1997 made her BBC Prom debut in the Proms Chamber Music Series at the Victoria and Albert Museum.
In April 2006 Catherine performed the Mozart Flute and Harp Concerto with Sir James Galway, in July at the Concertgebouw with her sister Emily Beynon (the Principal Flute at the Royal Concertgebouw Orchestra) and in the December she performed the Concerto with Wolfgang Schulz (the Principal Flute of the Vienna Philharmonic Orchestra.)
Catherine has also made many chamber music recordings for labels Naxos, Metier and Hyperion. She has performed as a concerto soloist with the English Chamber Orchestra, the Philharmonia, the BBC National Orchestra of Wales and the London Chamber Orchestra. As principal harp of the European Union Youth Orchestra Catherine has worked with many eminent conductors including Haitink, Ashkenazy, Guillini and Rostropovich. In August 1999 Catherine was appointed principal harp of the Royal Danish Orchestra in Copenhagen (Det Kongelige Kapel) and in May 2000 she was awarded the honorary degree of ARAM by the Royal Academy of Music in recognition of her distinguished performance in the profession. Since September 2003 Catherine has been principal harp in the Orchestra Philharmonic du Luxembourg.