LONDON - FLIGHTS from some of Britain's busiest airports are being delayed due to a computer problem at the country's main air traffic control centre at Swanwick, London's Heathrow and Luton airports said on Thursday.

'Passengers are advised that arriving and departing flights from all south-east airports are currently experiencing delays due to a problem with air traffic control systems operated by NATS,' Heathrow Airport said on its website.

'Engineers from NATS are investigating the cause of the fault and are working to restore the system as soon as possible.' Luton Airport reported similar delays.

NATS, which provides air traffic control services at 15 of the UK's biggest airports, was not immediately available for comment. -- REUTERS