A 20-minute UK air traffic control system outage caused by a radar display issue grounded planes and led to 150 flight cancellations and widespread delays. NATS, the air traffic control operator, switched to a backup system, but the disruption continued into the next day. While NATS stated the event was isolated and not a cyberattack, airlines criticized the second major failure in 2023, with Ryanair calling for the CEO's resignation. Experts debated whether the outage was unavoidable, with some highlighting the need for greater transparency and redundancy in the system.

Prepared by Jonathan Pierce and reviewed by editorial team.