Fetal cardiologist Dr Simpson specialises in prenatal diagnosis and management of heart problems. He has been a consultant at Guy's and St Thomas' Hospital since 1988. Dr Simpson is director of paediatric echocardiology at the Evelina Children's Hospital, which is part of Guy's, in Central London.
Dr Simpson also cares for babies and children with congenital heart diseases after birth.
He has published over 50 papers in the field of congenital heart disease and has contributed chapters to the two leading textbooks on fetal cardiology.
Dr Simpson practises at the clinic when his specialist skills are required.