He trained in emotion-focused therapy with the developers of EFT; Professors Leslie Greenberg and Robert Elliott. His main research interest is in the area of psychotherapy research, in particular, emotion-focused therapy; and he is Principal Investigator on a Randomised Controlled Trial comparing EFT with CBT in the treatment of Generalised Anxiety Disorder. He is the author of a number of books, including two books on Emotion-Focused Therapy; ‘Transforming Emotional Pain in Psychotherapy: An Emotion-Focused Approach’ (Routledge, 2015), and ‘Transforming Generalised Anxiety: An Emotion-Focused Approach’ (Routledge, 2017).