Mark has been consultant anaesthetist at St James’s University Hospital, Leeds since 1993, and professor of critical care anaesthesia since 2004. He has anaesthetised patients for bariatric surgery for the last 15 years. He took part in the Association of Anaesthetists working group on anaesthesia for the obese patient, and is co-author (with Professor Michel Struys) of the book “Anaesthesia For The Overweight And Obese Patient” (Oxford University Press, 2007). In addition, he has interests in critical care and liver transplantation.