The boss of Ryanair has slammed a report on the flights chaos seen over the bank holiday as “rubbish”.
Michael O'Leary claimed the findings “downplay the impact on the aviation industry” and said the report was “full of excuses”.
The UK's air traffic control system was brought down in a “one in 15 million” event, the head of air traffic services, Nats, said on Wednesday. Hundreds of flights were delayed or cancelled as a result on 28 August. Industry group Airlines UK argues that carriers incurred huge costs in providing accommodation and putting on more flights for customers who were stuck overseas.
It is now calling for these costs to be covered. Mr O'Leary told the BBC that the disruption will cost the airline between £15m and £20m in refunds for hotels, food and alternative travel arrangements.
He said that “there won't be any issues” for customers claiming costs, but demanded that Nats, which controls the UK's air traffic services, “accepts responsibility for its incompetence”. Marion Geoffroy, managing director at Wizz Air UK, said that it, along with its customers, had “suffered severe disruption” because of cancellations and accommodation costs.
Tim Alderslade, chief executive of Airlines UK, said: “Airlines cannot be the insurer of a last resort.
“We can't have a situation whereby airlines carry the can every time we see disruption of this magnitude.”
The group represents the likes of British Airways, EasyJet, Jet2, Ryanair, Virgin Atlantic and Tui. EasyJet boss Johan Lundgren also said that “many questions are still left unanswered” after Nats published an initial report into what exactly caused the system failure.
“An incident on this scale should not have happened and must not happen again,” he added, saying that he was looking forward to a more “wide-ranging” review.
How did airport chaos unfold?
In its initial report published on Wednesday, Nats said that at 08:32 on 28 August, its system received details of a flight which was due to cross UK airspace later that day. Airlines submit every flight path to the national control centre; these should automatically be shared with Nats controllers, who oversee UK airspace.
The system detected that two markers along the planned route had the same name – even though they were in different places. As a result, it could not understand the UK portion of the flight plan. This triggered the system to automatically stop working for safety reasons, so that no incorrect information was passed to Nats' air traffic controllers. The backup system then did the same thing.
This unfolded in just 20 seconds. Engineers struggled to fix the problem, and called in the manufacturer for help. Martin Rolfe, chief executive of Nats, said that the system did “what it was designed to do, i.e. fail safely when it receives data that it can't process”.
He described it as “a one in 15 million flight plan that we received”, meaning the engineers took a few hours to work out a situation they were not familiar with. It was the first time this had happened in the five years the software had been operating, having processed more than 15 million flight plans, he said.
Nats said it had taken measures to prevent the situation from happening again.
“We were in the situation where we had thousands of flights in the air and we received a piece of data which our systems could not process. If that happened today, we would absolutely be able to deal with them,” Mr Rolfe told the BBC's Today programme.
The UK's aviation regulator, the Civil Aviation Authority (CAA), has also announced an independent review, expected to report in a few months' time. The watchdog said it could take action if Nats had breached “statutory and licensing obligations”.
Mr Rolfe apologised again to customers whose holidays were affected during an interview with the BBC.
“We absolutely understand how disruptive the events over the bank holiday were for people.”
With planes and crew out of position and most flights already booked up, many people found themselves stuck abroad on what is usually a big day for travel – a bank holiday – facing long waits to get home.
As last week went on, airlines put on extra flights in an attempt to clear the backlog.
But questions have remained over how one flight plan could cause such huge disruption. For a time, flight plans had to be processed manually, which meant restrictions were imposed on the number which could be handled.
The system was back online just before 14:30 BST. It wasn't until just after 18:00 that restrictions on air traffic were fully removed.
Both Nats and the CAA say safety was never compromised. The Nats report also cites Eurocontrol data as showing 5,592 flights operated in UK airspace on 28 August, 2,000 (or 25%) fewer than had been expected. This includes cancelled flights and those which avoided UK airspace.
Nats believes there were about 1,500 cancellations on the Monday alone, with all UK airlines affected.
“Systems of this nature are used throughout the world and this scenario has never been encountered before,” wrote the CAA after its initial assessment of Nats's report detailing what went wrong.
The CAA said the event “is now understood and should it reoccur would be fixed quickly with no effect to the aviation system”. Mr O'Leary is also calling on the Transport Secretary, Mark Harper, to order Nats to reimburse airlines for these costs, saying “it's the moral thing to do”.
Mark Harper MP said that he was pleased to receive confirmation that there were no safety issues. He added that the independent review from the aviation watchdog will “dig deeper into this event and understand whether there are any further steps to be taken to improve the resilience of the air traffic control system”.
— CutC by bbc.com
