Gareth trained at Rose Bruford College.

Recent theatre credits include: Joking Apart (Tour), Touch (Soho Theatre), An Inspector Calls (UK Tour), Public Displays of Affection (Soho Theatre), Pedal Pusher (Edinburgh, Tobacco Factory Theatre, Maihaugen Theatre Norway) The Diary of Anne Frank (The Broadway Theatre), Divorce Me Darling (Union Theatre), Antigone, The Trial of Helen of Troy and The House (BAC), Breaktime (The Pleasance), Romeo & Juliet (Teatro Vivo), Cosi (The Bridewell), A Rake's Progress (Seattle USA).

Recent film credits include: The Art of Conversation, Emma, Dispossessed.