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  • Personal injury, clinical negligence, immigration, family law, and Occupational Health expert witness assessments

  • Works across the lifespan: with children, adolescents, and adults

  • Expert witness assessments are conducted online or in-person in Scotland, northern England, and London

  • Psychological therapy is conducted online

Dr Siddaway (Clin.Psych PhD CPsychol) is Registered with the Health and Care Professions Council (HCPC) and Chartered by The British Psychological Society (BPS). He has worked in a range of NHS mental health services since 2004 and has extensive clinical experience assessing and treating children, adolescents, and adults experiencing a wide range of mental health problems. He gained his Doctorate in Clinical Psychology from the University of Hertfordshire in 2013; his enthusiasm for risk research and psychometrics (psychological assessment and evaluation) led him to undertake a PhD, which he completed in 2017. He is trained in a number of evidence-based psychological therapies for working with complex psychological problems. His doctorates, extensive clinical experience and training, and ongoing Continuing Professional Development mean that he brings a depth and breadth of knowledge of psychological science and evidence-based practice to clinical practice, expert witness work, psychological therapy, and research.


Dr Siddaway splits his time between NHS clinical practice as a Consultant Clinical Psychologist, expert witness assessments, conducting and supervising research, and some private psychological therapy (see specific pages above for further information). He particularly specialises in the areas of trauma/adversity and risk (risk to self, risk to others, risk from others); he conducts research and offers consultation, teaching, training, and supervision to other mental health professionals on these areas.


Dr Siddaway has worked as an expert witness Clinical Psychologist since 2017 and has developed a strong reputation for producing rigorous and accessible reports in complex cases. He attended the BPS’ expert witness training, is listed on the BPS’ Directory of Expert Witnesses, and was recently appointed Chair of the BPS’ Expert Witness Advisory Group, which advises on professional standards and good practice for psychologists working as expert witnesses. Dr Siddaway continues to tend to conduct expert witness assessments remotely; he considers the appropriateness of doing so on a case-by-case basis, in collaboration with instructing parties and client(s), taking account of any contraindications to remote assessment, particularly age and cognitive abilities, and always prioritising clinical need and ethical rights (click here for a summary of the evidence-base regarding remote psychological assessments and interventions and more details about when Dr Siddaway does and does not work remotely).


Dr Siddaway's Expert Witness CV

Health and Care Professions Council (HCPC)
Registered with the Health and Care Professions Council (HCPC) (PYL 30674)
Registration with the HCPC authorises usage of a protected title (Clinical Psychologist) and demonstrates to the public and other professionals that a particular individual is ‘practicing legally, safely and effectively.’
British Psychological Society
Chartered by the British Psychological Society (169463)
The title of Chartered Psychologist is legally recognised and reflects only the highest standard of psychological knowledge and expertise.
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