Thomas suffers from a largely invisible form of cerebral palsy, a spectrum of conditions which result from birth trauma and have developmental consequences.
Thomas worked as an actor for one year after graduating from Guildhall, appearing on screen in BBC's 'Restless' (2012),[3][4] ITV's Inspector Lewis (2013),[5] and starring as Irwin in the Crucible Theatre's production of Alan Bennett's The History Boys (2013)[6] alongside Matthew Kelly, directed by Michael Longhurst.
In 2013, Thomas was forced to stop acting due to ill health. He suffered complications from his disability, ad spent 4 years rehabilitating his injuries with The Feldenkrais Method.
During this time he worked in education, teaching English and French and working as a careers advisor and 6th form mentor at St Mary Magdalene Academy. He also co-developed an outreach programme for the Guildhall School, running acting workshops across schools in London.
Guy Lodge said of Thomas in Variety: "Ross’s weary, take-and-take relationship with his client, friend and sometime lover gives the film its most quietly moving thread, buoyed by Thomas’s stoic, softly sorrowful performance." For his work, Thomas was selected as a Screen International Star of Tomorrow.
Thomas has cerebral palsy. Injuries sustained as a result of his condition prevented him from acting for much of his twenties, but he subsequently returned to running, swimming, tennis, football and acting, having recovered from his injuries using The Feldenkrais Method. Thomas is an advocate for invisible disability and helps spread awareness of disability in both education and the entertainment industry.