On Monday, more than a quarter of all UK flights were cancelled due to a problem with National Air Traffic Services.

On Tuesday, delays and cancellations are still occurring as people hurry to board flights.

The Civil Aviation Authority will now investigate the event, according to the PM’s official spokesperson.

“Based on the information we have, there was no cyber-attack,” they continued.

“The precise cause of the technical incident will be investigated by the Civil Aviation Authority and then reported to the government.”

Earlier, Transport Secretary Mark Harper said it would take “some days” to get “completely everybody to where they should be” after the technical failure left thousands of travelers delayed.

“The last time there was something this significant was about a decade ago,” Mr Harper said on Tuesday morning’s Today programme on BBC Radio 4.

He acknowledged that the timing “wasn’t at all helpful for people,” but that “those in government who look at these things have looked at it and are clear that it wasn’t a cyber attack.”

Cirium, an aviation analytics provider, reported that as of 9:00 BST on Tuesday, 147, or 5%, of UK departure flights and 134, or 5%, of arrivals had been canceled.

Mr. Harper is in “constant dialogue” with all industry participants, according to Prime Minister Rishi Sunak, and will meet with airlines on Tuesday.

People left stranded as UK flight disruption’set to last days’
Heathrow Airport, the world’s biggest two-runway airport, said its schedule remained “significantly disrupted” on Tuesday, while EasyJet claimed some aircraft are still “unable to operate.”

Holidaymakers recounted a horrific Bank Holiday Monday, with many of them waiting for hours for word on when they may be able to go.