Our hospitals Royal Brompton Hospital & Harefield Hospital are the largest specialist heart and lung service in the UK Royal Brompton and Harefield hospitals carry out some of the most complicated heart and lung procedures in the world. Together with heart and lung specialists in Guy’s and St Thomas NHS Foundation Trust, they form the UK's only specialist heart and lung service and are currently the only NHS organisation in the country with a total artificial heart programme. Royal Brompton Hospital Royal Brompton Hospital in Chelsea has more than 2,200 staff, five operating theatres, one hybrid theatre and four catheter laboratories. It is home to Europe’s largest centre for the treatment and management of cystic fibrosis, also seeing patients suffering from asthma and other lung conditions from across the country. Royal Brompton is also home to Europe's largest adult congenital heart disease unit. Harefield Hospital Harefield Hospital in Hillingdon has more than 1,300 staff, five operating theatres and four catheter laboratories. The hospital is one of the world's largest and most experienced centres for heart and lung transplants. Harefield also has a dedicated heart attack centre dealing with cardiac emergencies from outer north-west London.