The mission of the BCNI is to inter-relate basic and clinical research in psychiatry and neurology for such conditions as Parkinson's, Huntington's, and Alzheimer's diseases, frontal lobe injury, schizophrenia, depression, drug addiction and developmental syndromes such as attention deficit/hyperactivity disorder. Trevor's current research is focused on impulsive-compulsive disorders (such as OCD and drug addiction) and fronto-striatal systems of the brain.

Trevor is a Fellow of the British Psychological Society (1990), British Pharmacological Society (2017), the Academy of Medical Sciences (2000) and the Royal Society (2005). He has been President of the European Behavioural Pharmacology Society (1992-1994) and he won that Society's inaugural Distinguished Scientist Award in 2001. He was also President of the British Association of Psychopharmacology from 1996 to 1997. He has edited the journal Psychopharmacology since 1980 and joined the editorial board of Science in January 2003. He has been a member of the Medical Research Council (UK) and chaired the Neuroscience and Mental Health Board from 1995 until 1999.