AIR passengers travelling to the US were told to expect delays after heightened security measures were put in place in the wake of the failed attack.
People flying across the Atlantic were advised to arrive early and carry just one piece of hand luggage.
After checking in and going through security as normal, passengers can expect extra bag checks and body searches at the departure gate before boarding flights.
And travellers were being told to remain seated for the final hour of the journey, with no access to the bathroom or overhead lockers, and nothing on their laps.
Airport operator BAA said: “To support this important process, which will take time, we would advise passengers to leave more time to check in and limit the amount of baggage being taken on board the aircraft.
