My interests include prevention and early intervention in severe mental health problems, particularly as they emerge in young people: 1. The next generation of early intervention psychosis teams; application of the the early intervention in psychosis model across the spectrum of youth mental health. 2.Affective dysregulation in psychosis including depression, social anxiety and PTSD. 3.Developing and testing the cognitive model of voices. My trial of CBT to reduce harmful compliance with commanding hallucinations was published in Lancet Psychiatry. 4.Developing collaborative care between primary and secondary care in the management of severe mental illness. 5. School-based early detection and intervention in emerging mental health problems in adolescence, including eating disorders and self-harm.