A technical issue in the U.K. air traffic control system has led to the cancellation of more than 1,000 flights, according to Flightradar24.

More than 1,000 departures and arrivals into British airports were cancelled today, with thousands of passengers left stranded.

Departing flights faced disruptions across Britain due to a technical issue. Air traffic control provider NATS experienced a problem which affected departures. Arriving flights…