Catherine Williams, FRCEM, Consultant in Emergency Medicine with dual accreditation in Paediatric Emergency Medicine, Royal Bolton Hospital. Training programme director for Intermediate Emergency Medicine training, Health Education North West. Amy Nickson, FRCEM DTM&H DLM DRCOG, Consultant in Emergency Medicine, Royal Bolton Hospital. Sexual Offences Examiner, Lancashire SAFE Centre. This 5th Edition is edited by Catherine Williams and Amy Nickson, has been revised and updated by contributors, and is based on the 4th edition of Lecture Notes: Emergency Medicine which was authored by Chris Moulton and David Yates.