Nats: Internal telephone system causing problem

National Air Traffic Services have identified the technical problem which has resulted in travel chaos in airports across the UK.

The company said a problem with the internal telephone system meant additional control positions were not able to be opened to cope with the demand in traffic.

National Air Traffic Services (Nats) are based in Swanwick in Hampshire. Credit: PA Wire

"We now understand what the problem is and our engineers are working hard to rectify the issues as quickly as possible. Everyone in our operation will continue to work with our customers to manage the traffic and clear the backlog," the statement read.

The company insisted safety had "not been compromised at any time" and the disruption had only caused a reduction of around 20 per cent.

"We apologise sincerely for any inconvenience being caused to passengers," Nats added.

Read: Aviation expert: Flight delays could last for whole day

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Delays may continue after air traffic control problems

Passengers were left stranded today when a technical problem at an air traffic control centre caused chaos at airports across the UK and Ireland.