Dr Leo Russell (DClinPsych) is a is a chartered Clinical Psychologist registered with the Health and Care Professions Council. He is an IEDTA and ISTDP-UK accredited trainer and supervisor. His clinical practice is in the NHS working as service lead for the Functional Neurological Symptoms Service at Devon Partnership Trust where he specialised in ISTDP for medically unexplained symptoms.

Having trained under Dr Neborsky, his work draws on attachment theory and affective neuroscience as a framework for understanding causes of mental health difficulties and somatic symptoms. He has published research on the application and efficacy of ISTDP for functional presentations. He has taught and presented on ISTDP at national conferences, symposiums and seminars, as well as leading a regular programme of ISTDP teaching on the Clinical Psychology Doctorates at Exeter and Plymouth University. He also delivers an ISTDP foundation training programme in his local NHS Trust as a project to increase availability of ISTDP informed practice within specialist NHS services.