I was educated at Dulwich College.  I graduated from Guy's Hospital Medical School in 1977. I was awarded a MRC Scholoarship to study for an intercalated BSc Honours degree in Pharmacology.  I completed my clinical studies and graduated with both conjoint (MRCS, LRCP) and MB BS. I then did SHO posts in neurology and neurosurgery (Royal Free Hospital), respiratory medicine (Royal Brompton Hospital) and cardiology (London Chest) passing my MRCP in 1979.  I was a registrar in general medicine at Charing Cross Hospital, and then an MRC Research Fellow and Honorary Registrar in Guy's Hospital responsible for the Guy's Hospital participation and contribution to the international, multicentre MRC sponsored European Coronary Surgery Study published in NEJM.  I was awarded my MD by the University of London for my thesis titled "Exercise testing after myocardial infarction" in 1985.  I was then appointed as registrar in cardiology and senior registrar in cardiology, general medicine and ITU, at UCH and Middlesex and Whittington Hospitals. I was appointed consultant in cardiology and general medicine at Northwick Park and St Mary's Hospitals, and was Senior Lecturer and a "Recognised Teacher" at Imperial College School of Medicine.  I set up the coronary angioplasty service and was Chairman of the Resuscitation Committee and member of the Harrow Ethics Committee.

I was appointed as consultant in pulmonary hypertension at the Royal Free Hospital in 2004 and Honorary Associate Professor, Division of Medicine, UCL in 2004, and promoted to Honorary Clinical Professor in December 2021.  I am an examiner in finals MB BS and for postgraduate degrees submitted to UCL.

I was a personal tutor and a reflective tutor for UCL medical undergraduates.

I am an elected Fellow of the Royal College of Physicians of London, the European Society of Cardiology and the American College of Cardiology. I am a Freeman of the City of London.  Since 2005, I have been the chairman and organiser of the annual St Paul's School Medical Conference for state school and academy students.  I am on the selection panel for UCL Medical School and King's College School of Medicine.

I am an expert adviser to NICE, I referee grant applications submitted to the MRC. I am instructed in complex medico-legal cases.