Trevor is the founder of Cognitive Hypnotherapy and the Training Director of The Quest Institute. He is a practising Hypnotherapist with a clinic in Harley Street. He was the editor of the Hypnotherapy Journal of the National Council for Hypnotherapy for nine years, and was their Director of Ethics and Supervision for a further five until he stepped down in 2011.

He is a Fellow of the National Council for Hypnotherapy and in 2003 received their Researcher of the Year Award for his ground-breaking book Wordweaving: The Science of Suggestion. He was a Keynote speaker at their international conference in 2006, and in 2007 received their highest honour, the Hartland Memorial Award, for his outstanding contribution to Hypnotherapy.

Trevor has gained a reputation as one of the leading experts in the theory and practice of hypnotic language, and his integration of modern scientific discoveries into the practical aspects of therapy has made him one of the key figures in the modern therapy field. His books have gained him a worldwide audience, and students travel from all over the world to train with him.

To promote Cognitive Hypnotherapy Trevor contributes to a wide range of national magazines, and has appeared on BBC radio on several occasions, including appearing regularly, with Rebecca, on the Jeni Barnett show on BBC London as resident Agony Aunt and Uncle...