The National Air Traffic Services (NATS) said late Tuesday it was still working to resolve disruption following a "system issue"

Flight operations have been severely disrupted at several London airports following a failure in the flight plan processing system operated by National Air Traffic Services…

Departing flights faced disruptions across Britain due to a technical issue. Air traffic control provider NATS experienced a problem which affected departures. Arriving flights…

BRITAIN-AIRPORT:Air traffic control issue disrupts flights at major UK airports