The chief government of National Air Traffic Services (NATS) has stated he can not reveal the reason for the glitch which has affected 1000's of passengers however is "not ruling out anything at this stage".
Martin Rolfe stated on Tuesday night that an preliminary investigation had discovered that the air site visitors management failure was brought on by flight information acquired.
However, he later informed Sky News: "You will understand we have very complex systems, handling something in the region of two million flights a year and the safety of those passengers is incredibly important to us.
"We usually are not going to hurry into saying what the trigger is till we completely absolutely perceive."
Night flights given go ahead to ease disruption - air traffic chaos latest
Reports have urged the chaos could have been induced after a French airline misfiled its flight plan.
Without confirming the reviews, Mr Rolfe stated: "It could be a single flight plan... if it is a flight plan that has caused this, we know it is something in the flight data and we will get to the bottom of it and understand why."
However, he added: "I'm not ruling out anything at this stage.
"We are conducting an investigation, we are going to conduct it extremely completely."
Despite Mr Rolfe saying he isn't ruling something out, NATS stated earlier there may be "no indication" it was focused in a cyber assault.
Hundreds of flights across the UK have been cancelled after yesterday's air site visitors management disruption. The incident on Bank Holiday Monday meant flight plans needed to be uploaded to techniques manually, slowing or cancelling air site visitors throughout the nation.
Thousands of passengers had been affected by yesterday's disruption - and lots of are nonetheless ready for his or her flights as we speak.
NATS suffered what it described as a "technical issue", stopping it from mechanically processing flight plans.
This resulted in flights to and from UK airports being restricted whereas the plans had been checked manually.
NATS stated at 3.15pm on Monday the issue was resolved, however disruption continued into Tuesday as many plane and crews had been out of place.
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Analysis of flight information web site reveals at the very least 281 flights - together with departures and arrivals - had been cancelled on Tuesday on the UK's six busiest airports.
This consisted of 75 at Gatwick, 74 at Heathrow, 63 at Manchester, 28 at Stansted, 23 at Luton and 18 at Edinburgh.
EasyJet introduced it can run 5 repatriation flights to Gatwick following the air site visitors management fault in addition to working bigger plane on key routes.
Aviation analytics firm Cirium stated 790 departures and 785 arrivals had been cancelled throughout all UK airports on Monday.
That was equal to round 27% of deliberate flights and means round 1 / 4 of one million individuals had been affected.
British athletes had been stranded in Budapest after the World Championships.
A gaggle of round 40 athletes and employees from UK Athletics returned to their lodge within the Hungarian capital on Monday evening due to the flight chaos.
Some of the affected athletes selected to journey on to Zurich for Thursday's Diamond League occasion.
Holidaymakers caught within the UK and overseas described their frustration, as some had no thought when or how they might get to their vacation spot.
Vicki Ostrowski has emailed Sky News to say she was stranded in Oslo with a "disabled, wheelchair-bound passenger with a neurological disease, an 83-year-old frail relative, plus three other family members".
She added: "I myself will run out of essential heart medication two days before the flight they have reassigned us on 2 September at 5pm!"
Kayleigh, one other reader, received in contact to say she was caught at Las Palmas airport in Gran Canaria.
"It's been 13 hours, it's freezing, and we are trying to get some sleep on the cold floor," she stated.
"There are children lying on the cold floor, people making public speeches about the airline and it is sheer pandemonium.
"I've by no means felt so helpless. Been awake for 22 hours. We've now spent 14 hours within the airport. We had been informed if we waited 2-3 hours they might kind out a lodge.
"We have still heard nothing with ground staff saying they don't know anything and no one has been around to check if people are okay!"
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