The explorer Sir Ranulph Fiennes is recovering in hospital after undergoing an emergency heart by-pass operation.
Sir Ranulph is recovering in hospital after the bypass operation
The 59-year-old record-breaking adventurer suffered a heart attack on board an easyJet plane which was
due to take off from Bristol airport to Edinburgh at 0730 BST on Saturday.
Cabin crew contacted emergency services and he was taken to the Bristol Royal Infirmary.
Sir Ranulph's wife Virginia is at his bedside.
A hospital spokeswoman said: "Sir Ranulph collapsed yesterday morning while at Bristol airport waiting to board a flight to Scotland.
"He received very prompt attention at the airport and was transferred to the Bristol Royal Infirmary yesterday morning.
The bottom line is that you don't see a crevasse until you fall down it
"Last night he underwent an emergency heart by-pass. His condition is described as critical but stable. He is in intensive care."
An easyJet spokeswoman said 130 passengers and five crew were on board the flight which was delayed for three hours, at the time.
Sir Ranulph's expeditions to remote parts of the globe have seen him achieve outstanding goals - and overcome potentially life-threatening situations in the process.
"The bottom line is that you don't see a crevasse until you fall down it," the old Etonian once said.
In 1993, Sir Ranulph became one of the first men to walk unaided across Antarctica.
Severe frostbite dramatically halted the Exmoor-based explorer's attempt to reach the North Pole in 2000.
He plunged into freezing water when one of the two food supply sledges he was towing fell through thin ice.