Air passengers in the UK were today facing huge delays after police foiled a deadly terror plot this morning.
This is a guide the problems facing some of the largest and local airports today:
A spokesman for Coventry Airport said "the majority" of the it's flights have avoided delays.
But extra help has been drafted in to help with the extensive searches taking place.
All incoming flights not already in the air have been stopped from going to the airport.
Passengers due to fly out of Heathrow today (Thur) have been urged to postpone their plans - unless the journey is absolutely essential.
Bosses at Birmingham International Airport have been asking passengers to turn up for flights as normal but asked them not to carry hand luggage unless it was "absolutely essential".
Travellers were told they faced hours of delays as they queued to board planes at Gatwick Airport. Armed police and sniffer dogs patrolled concourse areas as long queues snaked through the check-in zones.
Luton Airport today said hand luggage was "severely limited" and advised passengers to check in as soon as possible upon arriving.
A spokesman for the airport says all flights are being delayed by between one and three hours.
Nottingham East Midlands Airport said security had been increased and additional security measures put in place for all flights.
A spokesman said: "Regrettably, significant delays are inevitable. Passengers are being asked to allow themselves plenty of extra time and to ensure that, other than the few permitted items, all their belongings are placed in their hold baggage and checked in."