Kariem El Boghdadly MBBS BSc (Hons) FRCA EDRA MSc Consultant Anaesthetist, Guy’s and St Thomas’ NHS Foundation Trust; Honorary Senior Lecturer, King's College, London, UK Imran Ahmad MBBS FRCA Consultant Anaesthetist, Guy’s and St Thomas’ NHS Foundation Trust; Honorary Senior Lecturer, King's College, London, UK Alex Cumberworth BMBS BSc (Hons) FRCA Specialty Registrar in Anaesthesia, Oxford Deanery, UK Craig Bailey MBBS FRCA Consultant Anaesthetist, Guy's and St Thomas' NHS Foundation Trust, London, UK