She was previously a Violinist for the London-based string quartet Escala.
She created Eyes Alight, an appeal to bring awareness and support to treatment for brain injuries after her brother Rupert was seriously injured in a road accident in 1997.
She was born Brittany "Izzy" Johnston. She and Harry met when she came along McFly's 2005 tour as a member of their string section and married in 2012. They are parents to a daughter named Lola Rose Emma and a son named Kit Harry Francis.
Her husband Harry is joined in McFly by Tom Fletcher, Danny Jones, and Dougie Poynter.