I have 25 years of experience as a cardiologist specialising in structural abnormalities of the heart. Appointed Consultant in Paediatric and Fetal Cardiology since 1999 at Guy's and St Thomas NHS Trust. Promoted to Professor in 2014 with specific research interests in advanced imaging of structural heart disease.My subspeciality interest include non-invasive imaging of the heart including 3D echocardiography and fetal echocardiography. I was Chief Investigator on a British Heart Foundation translational grant to use virtual reality imaging to improve planning and delivery of interventional cardiac catheterisation and cardiac surgery. This technology transforms planning of procedures be allowing insertion of virtual devices into images of the patients own heart so that procedures can be "road tested" in advances. This work has led to the formation of XRnostics, a spin out company backed by GSTT enterprises to bring this technology to market (www.xrnostics.com) My published work includes over 300 papers in the field of congenital heart disease, including lead author of the 2016 USA/European guidelines on 3D echocardiography and co-author of the 2023 American Society of Echocardiography guidelines on fetal echocardiography. I am frequently approached for expert opinion in the field of diagnosis and management of congenital heart disease.I have undertaken consultancy work for Philips and for Canon medical systems.