UK air traffic control outage '1 in 15 million' event: boss

The head of British air traffic control on Wednesday blamed a “one in 15 million” event that caused the country’s worst systems failure in almost 10 years, stranding thousands of passengers.

Air traffic control systems were temporarily hit after the incident on August 28, causing hundreds of delays or cancellations to flights departing and arriving in the UK and costing carriers an estimated £100 million ($125 million).