Flights in and out of some UK airports, including the international hubs of Heathrow and Gatwick near London, were delayed or canceled yesterday when a computer glitch caused problems at the main air control center in Swanwick.
The problem hit about 4 pm yesterday, and British Airways alone had to cancel 35 domestic and European flights. There will also be a knock-on effect today with planes not where they should be, according to the BBC, and the size of the problem caused a spillover of the problem to airports all over Britain.

