Air passengers flying into and out of Britain are facing major disruptions after a computer problem affected operations at London airports.
The main British air traffic control group (NATS) said the issue that caused problems in the system has been resolved, and operations are beginning to return to normal. Heathrow Airport, one of the world's busiest, said flight departures had resumed.
Some incoming flights changed direction to head to other British airports after London's closure, but the disruptions extended into Europe, where flights bound for London were delayed.
The European air safety agency Eurocontrol originally said airspace over London would be closed for several hours, but British aviation authorities later said : "Airspace is open. We're restricting traffic volumes in accordance with capability we currently have in our system."
