More than 200 British Airways flights at Heathrow Airport in London have been grounded a result of a technical issue.
Flights into and out of the airport continue to be disrupted after the airport was affected by the issue, the airline said.
A further 30 departing flights are also grounded from UK's busiest airport.
All the flights are operated by British Airways.
On Sunday during the height of Storm Dennis, 73 departures and 60 arrivals from various carriers were cancelled.
The problems at Heathrow compounded the misery for UK air travellers after hundreds of flights were abandoned due to the storm, at the start of the February schools half-term holiday.
EasyJet's schedules were heavily reduced, with flights grounded at Gatwick, Luton and Bristol.
Heathrow Airport apologised for the ongoing disruption and said extra staff had been brought in to help direct passengers to the gates.
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Passengers on Sunday took to social media to complain of the "utter chaos" at the airport.
Jenny Nielsen tweeted pictures of whiteboards displaying handwritten flight numbers and destinations.
She said: "Computer systems down at Heathrow.
"No electronic tickets allowed, delays and no flight information on scrreens... Oh Blighty."
A spokesman for Heathrow Airport said: "Following yesterday's technical issue, Heathrow's systems are stable and the airport is operating as normal.
"We apologise for the inconvenienced this caused our passengers.
"Our teams continue to closely monitor our systems and will be on hand across our terminals to provide assistance to passengers."
A British Airways spokeswoman said: "The technical issue with Heathrow Airport's systems has now been resolved but, after 10 hours of disruption across all terminals, we do expect to see a knock-on effect to today's short-haul schedule.
"We've introduced a flexible booking policy and have brought in extra colleagues to help our customers get on their way as smoothly as possible."
