UK air traffic control technical issue causes major flight delays and cancellations across Europe

Technical failure in UK air traffic control system disrupted hundreds of flights on one of the busiest travel days.
Flights faced restrictions and delays due to the inability to automatically process flight plans.
Major airports including Heathrow, Gatwick and Manchester saw cancellations and delays.
Disruptions likely to continue for days as airlines and passengers deal with backlog.
Government ruled out cyberattack as the cause and ordered an independent review.