David Ashton-Cleary MBChB (Hons) FRCA FFICM DICM DiplMC (RCSEd)Consultant in Critical Care and Anaesthesia, Royal Cornwall Hospital, Truro, UK William English BMedSci BMBS MRCP FRCA DICM FICM Consultant in Intensive Care and Anaesthesia, Royal Cornwall Hospital, Truro, UK