1. Leeds Teaching Hospitals NHS Trust, Leeds, UK
2. Royal Brompton and Harefield NHS Foundation Trust, London, UK
3. West Midlands Congenital Heart Disease Network, UK
4. South Wales and South West Congenital Heart Disease Network, UK
5. University Hospitals Bristol and Weston, Bristol, UK
6. Evelina London Children's Hospital and Lifelong CHD Network, London, UK
7. North West, North Wales and the Isle of Man Congenital Heart Disease Network, UK
8. British Adult Congenital Cardiac Nurses Association, UK
9. Barts Health NHS Trust, London, UK
10. NHS Greater Glasgow and Clyde, Scotland, UK