The transport secretary has apologised for yesterday's nationwide air visitors management fault - saying points on this scale "haven't happened for a decade".
Mark Harper confused that technical consultants have dominated out a cybersecurity incident, with the Civil Aviation Authority set to analyze.
"Something on this scale hasn't happened for almost a decade - normally the system works very well," Mr Harper informed Sky News.
Britons sleeping on floors in airports - live updates
Thousands of passengers were affected by yesterday's disruption - with aviation analysts warning there may very well be knock-on results for days to come back.
And there have been experiences of heated scenes at airports throughout Europe, with "fists flying" in Palma as exasperated vacationers wrestle to return residence.
Heathrow Airport says companies will stay "significantly disrupted" at this time - and passengers are being urged to contact their airline earlier than heading to the terminal.
Departure boards on-line present quite a few cancellations and delays to flights throughout the morning, with disruption wanting prefer it eases because the day progresses.
British Airways seems to be the worst affected airline.
Elsewhere, London Gatwick mentioned it plans to function a standard schedule on Tuesday following the disruption.
However, passengers have been suggested to examine the standing of their flight with their airline earlier than travelling to the airport.
London Stansted additionally mentioned it deliberate to run a standard flight schedule on Tuesday, however added "our terminal may be busier than anticipated".
And main UK airways similar to Tui and BA warned of "significant delays" for passengers amid adjustments to schedules, with airports urging travellers to examine with their flight operators earlier than they head to the terminal, in case of delays and adjustments.
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