The dispute, centered mainly on extra pay for night shift work, has led controllers to pause planned industrial action.
EasyJet says the latest incident "once again calls into question the resilience" of the system, according to the BBC.
The disruption follows an earlier incident this month that canceled thousands of flights and was initially described as a technical issue.
British Airways and easyJet were among carriers affected by a second air traffic control technical issue in two weeks, according to the Guardian.
Scotland, Northern Ireland and northern England were affected before the issue at Prestwick was fixed, The Guardian reported.
National Air Traffic Services said it was investigating a technical issue before confirming it had been fixed, according to the Guardian.
A new AI-based software system is being introduced to support air traffic controllers, according to a report from TechCrunch.
Aviation authority attributes cancellation of more than 2,000 flights to a technical software failure, BBC reports
A report has identified a software fault as the cause of the air traffic control disruption that led to thousands of flight cancellations across the UK, according to The Guardian.
A report attributes a major UK air traffic control meltdown, which grounded thousands of flights, to 'spurious' data entered by a military aircraft.
With flights being cancelled due to air traffic control problems, BBC Business has published guidance on what travellers are entitled to when their journeys are disrupted.
British airports began restoring flight schedules on Wednesday following a technical fault in the country's air traffic control system that left hundreds of thousands of passengers stranded, authorities said.
Nats chief rules out cyber-attack and apologises as second day of disruptions continues; oil prices surge above $100 a barrel amid Iran conflict escalation.
A technical fault at National Air Traffic Services has been fixed, but disruption has stretched into a second day, grounding flights and delaying tens of thousands of passengers.
NATS, the air navigation service provider for the United Kingdom, faces scrutiny after a technical glitch caused widespread delays and cancellations.
A technical problem at UK air traffic control provider Nats has disrupted departures from several airports, with further delays anticipated, the BBC reported.
Hundreds of flights have been cancelled and more delayed after a glitch hit air traffic control provider Nats, affecting departures from a number of airports, according to the BBC.
A technical problem at National Air Traffic Services has affected departures from a number of major UK airports, according to the BBC.
Departures from several UK airports have been affected by a technical issue involving air traffic control provider Nats, according to the BBC.
Departures from several UK airports remain affected by a technical problem at air traffic control provider Nats, according to BBC Business.