Eurostar passengers are braced for more possible disruption, after a power outage in the Channel Tunnel caused travel chaos for thousands of people on Tuesday.
As people scrambled to get to New Year's Eve celebrations, some travellers said they spent more than six hours stuck onboard trains overnight as services were hit by more delays.
One man told the BBC he had boarded the 19:01 service to Paris, but as of 03:00 GMT he was still stuck on the train at the entrance to the tunnel.
He said staff had told him there was a 50% chance we go to Paris, 50% chance we go back to London.
I guess my new year plan is in the hands of the tunnel operators now, the 27-year-old Parisian said.
Eurostar said it planned to run all of its services on Wednesday but warned there may still be some delays and cancellations.
The service from London to Paris scheduled for 06:00 GMT has been cancelled.
The problem with the overhead power supply and a broken down LeShuttle train blocked all routes on Tuesday, causing disruptions for thousands trying to get away for New Year's Eve.
Some Eurostar and LeShuttle services had resumed on Tuesday evening, but delays remained, with only one of the tunnel's two rail lines open.
Getlink, which runs the Channel Tunnel, said work continued through the night to fix the power issue.
On Wednesday morning, an update on Eurostar's website said: Services have resumed today following a power issue in the Channel Tunnel yesterday and some further issues with rail infrastructure overnight.
We plan to run all of our services today, however due to knock-on impacts there may still be some delays and possible last-minute cancellations. Please check for live updates on the status of your train on the train status and timetables page.
Dennis van der Steen, from the Netherlands, was heading home to Amsterdam to spend New Year's Eve with his family and friends. Instead he said he spent six hours stuck on board a Eurostar train, before it began to move again at about 03:00 GMT.
We're stuck, he told the BBC. He said there was no power onboard the train when it stopped, and that some passengers slept while others were also very worried. He was later told his train would continue on its journey.
Another passenger described feeling a rollercoaster of emotions for hours, not knowing whether the train he was on would be able to continue across the Channel or return to London.
His train eventually made it to Brussels, he said, adding: Glad to be home, saw many families stranded. Images of massive crowds of travellers stranded at London St Pancras International flooded social media following Tuesday's power outage.
Tim Brown, who had been trying to return to the UK after spending Christmas in Germany, told PA News he had been stuck in his car on the LeShuttle train for more than three hours with no access to food or water.
At least a dozen Eurostar services between the UK, France, Belgium and the Netherlands had been cancelled by midday on Tuesday. The rail operator apologised and said passengers could rearrange their plans free of charge or can cancel their booking and get a refund or an e-voucher.
