Nick Aresti is a Core Surgical Trainee in the London Deanery, London, UK. Manoj Ramachandran is a Consultant Orthopaedic and Trauma Surgeon at St Bartholomew's and the Royal London Hospitals, London, UK. Mark D. Stringer is Professor of Anatomy at the University of Otago, Dunedin, New Zealand and Chair of the Anatomy Committee, Royal Australasian College of Surgeons.