Passengers are facing widespread flight disruption after a computer failure at the UK's air traffic control centre.

Nats said it was in the process of returning to normal operations after a "technical problem" at its Swanwick control centre caused delays and grounded some flights.

Problems were reported around the UK.

The government said the scale of the disruption was "unacceptable" and said it had asked for a "full explanation" of what had gone wrong.
http://www.bbc.com/news/uk-30454240