Dr David Purves is a Consultant Chartered Counselling Psychologist, a qualified psychotherapist, and an accredited CBT therapist he is also a Chartered Scientist. Dr Purves was previously Course Director for the London Metropolitan University Doctorate program in Counselling Psychology. He was formally Head of the Berkshire NHS Traumatic Stress Service, based in Reading. He is now principle and Clinical Director of the Berkshire Psychology Service.His academic qualifications include a first class degree in Psychology from Lancaster University and a D.Phil in Experimental Psychology from the University of Oxford and a MSc in cognitive behaviour therapy from LMU. Dr Purves has published a number of academic articles, and contributed to books on the training of therapists. He has talked nationally and internationally on subjects related to Trauma, PTSD and computerized cognitive behaviour therapy. He is also frequently asked by the media for interviews and acts as an expert psychologist recommended by the British Psychological Society on matters of disaster and trauma. He is also an expert witness to the courts on matters of trauma and PTSD.