'No lessons have been learned': Airlines furious after another technical glitch cancels flightsAirlines have reacted furiously after a technical glitch in air traffic control systems led to more than 150 flight cancellations.
Source: 'No lessons have been learned': Airlines furious after another technical glitch cancels flights (https://news.sky.com/story/uk-flights-resume-after-glitch-as-airlines-criticise-outrageous-disruption-13404177)