Services through the Channel Tunnel using one of the two running tunnels, were able to continue but Eurotunnel warned that services were being delayed, with hold-ups possibly lasting for the rest of the day.
Hundreds of passengers have had to be evacuated from a broken-down train in the Channel Tunnel this morning, leading to long delays for travellers at London St Pancras.
The French-bound Eurotunnel passenger shuttle train came to a halt about a quarter of the way through the tunnel after a problem with the overhead power line. 382 passengers and four dogs were evacuated and taken on to the French terminal.
P&O Ferries said it was "delighted" to help an obese Frenchman stranded in London after Eurostar refused him entry on to a Paris-bound train.
Kevin Chenais, 22, was denied entry on to a Eurostar train as his lack of mobility would have breached strict safety regulations.
The incident was the latest setback for Mr Chenais as he bids tor return home to eastern France, after British Airways originally refused to fly him home from America.
A P&O Ferries spokesman said: "We're delighted to help. It's not difficult for us. We are used to carrying ambulances across the Channel, so we are set up for this type of thing.
"It's difficult to imagine the frustration that this gentleman has gone through. But for us, it's very straight-forward as we are set up to carry people who have medical needs."
Eurostar says it will pay for special ambulance to take a morbidly obese man from London, via ferry, to France. 22-year-old Kevin Chenais was stopped from travelling by train because of concerns over safety.
This afternoon, Eurostar said:
"Having arranged overnight accommodation in central London for Mr Chenais and his family, we contacted P&O last night to request their assistance arranging passage across the Channel.
"Following receipt of the necessary safety clearance from P&O we paid for the family to be transported to Dover in a special ambulance where they will board the P&O 'Pride of Britain' bound for Calais later this afternoon.
"Upon arrival in Calais, the family will continue their journey in the same ambulance to their home in south eastern France."
A ferry company has agreed to help a morbidly obese Frenchman stranded in London after he was stopped from getting on a Eurostar train. P&O Ferries says it will take 22-year-old Kevin Chenais across the English Channel. Eurostar said he posed a significant safety risk.
P&O Ferries said:
"We're delighted to help. It's not difficult for us. We are used to carrying ambulances across the Channel, so we are set up for this type of thing.
"It's difficult to imagine the frustration that this gentleman has gone through.
"But for us, it's very straight-forward as we are set up to carry people who have medical needs."
Eurostar have insisted they cannot ignore "very strict" safety regulations, after they refused travel to a 35-stone Frenchman.
Kevin Chenais, who weighs 35-stone, was denied entry onto a Paris-bound Eurostar train because of his lack of mobility.
“This is a terrible situation. Our heart goes out to Mr Chenais and his family who are understandably desperate to return home after being stranded in America," a Eurostar spokesman said.
"Unfortunately, there was no question that he would have been able to travel with Eurostar as we must observe very strict safety rules which govern travel through the Channel Tunnel."
The company said Mr Chenais’ immobility would have affected strict evacuation procedures in the event of an emergency, which may have posed a safety risk to himself, Eurostar officials and other passengers on board.
Eurostar confirmed that they had paid for Mr Chenais and his family to stay in London while they liaised with other partners to help find a solution to the 22-year-old's travel woes.