After training in general paediatrics, I specialised in paediatric cardiology in 1985. I obtained a broad experience in paediatric cardiology at the Freeman Hospital in Newcastle-upon-Tyne and spent three years carrying out research into the neurological effects of heart surgery in children. I was senior registrar in cardiology at Birmingham Children's Hospital and underwent further training in adult cardiology leading to a special interest in the teenager and adult with congenital heart disease.

I was appointed consultant paediatric cardiologist at the University Hospital of Wales in 1993 before moving to Bristol in 1998. I now have particular responsibility for the adult congenital heart disease service and for the congenital heart disease arrhythmia service for both children and adults. I also have a particular interest in cardiological disease in pregnancy and in Marfan's syndrome.

I carry out a full diagnostic service including echocardiography and diagnostic cardiac catheterisation. My invasive cardiology practice includes interventional cardiac catheterisation in children and adults with congenital heart disease - in particular invasive electrophysiology studies (pacemaker implantation and radiofrequency ablation).

In 2008, I set up Sports Cardiology UK. This is an expert assessment service which evaluates the cardiovascular system in athletes and would-be athletes of all ages from 12yrs old to old age.