Growing resistance to commonly prescribed antibiotics is one of the biggest public health threats of modern times, with the potential to cause 80,000 deaths in the UK over the next 20 years. Experts say the use of a range of NHS 'last-resort' antibiotics in farming is risking the lives of future patients. Tom Heap asks if the commercial pressure to produce cheap meat and poultry is fuelling the rise of superbugs and meets the patients for whom the drugs have already stopped working.