When the world's heaviest man was told he needed a life-saving operation, hospital bosses struggled for ideas of how to get him there, even considering air-lifting him with an RAF Chinook helicopter.

Eventually they settled on using a specially reinforced ambulance for obese people to transport Paul Mason from Ipswich, England. But now his operation could be delayed because Mason, who formerly weighed in at 980 lbs., has put on even more weight in the weeks it took to organize the operation.

Even the stretchers normally used to transport obese people can only carry up to 1,001 lbs. It's feared Mason -- who suffers from a compulsive eating disorder -- could be heavier.

Despite knowing he needed the life-saving surgery, the 48-year-old man-mountain continued eating his regular "diet" of 20,000 calories of food a day. Health officials will this week visit his home to weigh him. If he is too heavy to be transported Paul could have to lose the weight before being taken to hospital, delaying the operation and potentially endangering his life.