BBC News - Katy Austin
The UK's biggest airports are set to miss the deadline for installing new advanced security scanners that will end the 100ml limit on liquids.
The government told major airports to have the high-tech equipment in place by 1 June 2024.
But Heathrow, Gatwick and Manchester do not expect to have all their scanners ready by then.
Consumer group Which? warned it could cause confusion during the summer holidays.
The group said passengers may expect the hand luggage security rules to have been changed at all UK airports, only to find that is not the case, which could cause delays at security.
