A British doctor volunteering in DR Congo used text message instructions from a colleague to perform a life-saving amputation on a boy. Vascular surgeon David Nott helped the 16-year-old while working 24-hour shifts with medical charity Medecins Sans Frontieres (MSF) in Rutshuru. The boy’s left arm had been ripped off and was badly infected and gangrenous. Mr Nott, 52, had never performed the operation but followed instructions from a colleague who had. The surgeon, who is based at Charing Cross Hospital in west London, said: “He was dying.