Comments on reddit and Hacker News. Other posts: part two and part three. UPDATE: The flight plan which triggered the chaos (but was valid) has been identified! --- On 28 August 2023 NATS, the UK's air traffic control operator, suffered a major technical incident. The BBC reports that more than 2000 flights were cancelled and the cost has been estimated at over £100 million GBP. The incident probably affected hundreds of thousands of people. The press initially reported the cause was a fault...