1. Consultant Geriatrician, Perioperative Medicine for Older People undergoing Surgery (POPS), Department of Ageing and Health, Guy’s and St Thomas’ NHS Foundation Trust , London , UK
2. Honorary Senior Lecturer, School of Life Course and Population Sciences, Faculty of Life Sciences and Medicine, King’s College London , London , UK
3. Professor of Perioperative Medicine, University College London (UCL) , London , UK
4. Consultant in Anaesthesia, Department of Critical and Perioperative Care, University College Hospitals , London , UK
5. Consultant General & Colorectal Surgeon, Salford Royal, Northern Care Alliance NHS Foundation Trust , UK
6. Honorary Professor, School of Life Course and Population Sciences, Faculty of Life Sciences and Medicine, King’s College London , London , UK
7. Honorary Associate Professor , Division of Surgery and Interventional Science, , London , UK
8. University College London , Division of Surgery and Interventional Science, , London , UK