The Medical Director of the Midlands and London Diving Chambers, the delectable Dr Oliver Firth, was asked to give his expert opinion to those insightful people at the Daily Mail on the 'Diver who Cheated Death' whilst working in the North Sea. Read Dr Firth's explanation as to how commercial diver Chris Lemons was able to survive after his air supply was cut off for 40 minutes whilst working at a depth of 260ft in the North Sea... over to the expert.