Flights from several Scottish airports faced disruption early this morning due to air traffic control problems.
Edinburgh airport tweeted: “Due to an ongoing issue at the Scottish Airspace control centre, there will be a delay to all flights this morning.
“We will continue to update as we get more information.”
The airport called on passengers to contact their airline for further information and said updates would appear on its Twitter feed.
Glasgow, Aberdeen and Prestwick airports were also affected by the incident.
The air navigation service provider Nats’ Scottish area control centre based at Prestwick controls aircraft over Scotland, Northern Ireland, northern England and the North Sea from 2,500 feet up to 66,000 feet.
NATS said: “There has been a technical issue overnight at the Scottish Air Traffic Control centre at Prestwick; the cause has been identified and is currently being resolved.
“Some impact is expected on flights this morning, but the situation is improving.
“We apologise for the inconvenience people may be experiencing and will update with further details as soon as possible.”