Flights have resumed across major UK airports after an air traffic control failure triggered more than 1,000 cancellations. Heathrow and Gatwick, however, warned passengers to expect continued disruption as airlines work to reposition aircraft and crews and clear the backlog.

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…