The EU finished rolling out its new Entry-Exit System (EES) earlier this year, which requires passengers from outside of the bloc to register biometric information when entering and leaving most European countries, sparking hours-long airport queues and EES delays across the continent

Europe’s airport chief has warned that he “doesn’t know” how airports will “cope” with the huge delays caused by the new EU border system.

While the system has operated smoothly in some countries, it has also caused significant hold-ups at several airports.