UK air traffic control says it has fixed a technical problem that sparked delays and cancellations

Britain’s air traffic control system says it has fixed a “technical issue” that caused heavy delays and cancellations. National Air Traffic Services says it has “identified and remedied" a problem that meant flight plans had to be input manually for several hours on Monday. Airports both inside and outside the U.K. told passengers to expect waits and cancellations because of the glitch. British Airways says it had to make “significant changes” to its schedule and Heathrow Airport said its schedules would be “significantly disrupted” for the rest of the day. Monday is a holiday for many in the U.K. and a date when many families return from vacations before the start of the school year.