By Bruce Campbell MS FRCP FRCS Consultant in Vascular and General Surgery, Royal Devon and Exeter Hospital, and Honorary Professor to the University of Exeter, Exeter, UK, Ken Callum MS FRCS Consultant General and Vascular Surgeon at the Derbyshire Royal Infirmary, Derby, UK, Nicholas A Peacock MA (Cantab) Barrister Barrister at the Chambers of Kieran Coonan QC, 6 Pump Court, Temple, London, UK