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'Unusual piece of data’ caused flight chaos - air traffic control boss

An “unusual piece of data” caused widespread flight disruption, an air traffic control (ATC) boss said, as airlines are under growing pressure over their treatment of passengers. Many UK holidaymakers are stranded overseas after around 2,000 flights were cancelled because of the issue. There is speculation the ATC failure was caused by a French airline submitting a flight plan to National Air Traffic Services (Nats) in the wrong format. Downing Street did not rule out that possibility, while Nats declined to comment on whether that was what happened. Flights to and from UK airports were restricted for several hours on Monday afternoon as the fault prevented flight plans from being processed automatically, meaning manual checks were required. Nats chief executive, Martin Rolfe, told BBC Radio 4’s Today programme: “It wasn’t an entire system failure. It was a piece of the system, an important piece of the system. “But in those circumstances, if we receive an unusual piece of data that we don’t recognise, it is critically important that that information – which could be erroneous – is not passed to air traffic controllers.” Mr Rolfe said Nats has “safety-critical systems” and “throwing data away needs to be very carefully considered”. Subscribe to the Evening Standard: https://bit.ly/Subscribe-to-Evening-S... for latest breaking news from the UK, US and around the world, plus podcasts and features. Evening Standard on socials: Check out our full video catalog:    / londoneveningstandard   Videos, daily editorial and more: https://www.standard.co.uk/ Like us on Facebook: https://www.fb.com/eveningstandard Follow us on Twitter:   / eveningstandard   and Instagram:   / evening.standard