Participating Study Centres University Hospitals Bristol and Weston NHS Foundation Trust London North West University Healthcare NHS Trust Royal Devon University Healthcare NHS Foundation Trust Imperial College Healthcare NHS Trust East Kent Hospitals University NHS Foundation Trust Oxford University Hospitals NHS Foundation Trust Barts Health NHS Trust Norfolk and Norwich University Hospitals NHS Foundation Trust Portsmouth Hospital University NHS Trust University Hospitals of Leicester NHS Trust Nottingham University Hospitals NHS Trust Cardiff and Vale University Health Board Barking, Havering, and Redbridge University Hospitals NHS Trust University College London Hospitals NHS Foundation Trust Manchester University NHS Foundation Trust University Hospitals Sussex NHS Foundation Trust University Hospitals Dorset NHS Foundation Trust Map of recruitment sites