London Heathrow Airport has launched a major security makeover powered by advanced 3D computed tomography (CT) scanners, transforming hand luggage screening rules for millions of passengers.
Under the updated security guidelines, travelers passing through Heathrow can now carry liquids in containers up to two litres and leave laptops, tablets, and electronic devices inside their cabin bags during screening. However, UK transport authorities are issuing an important advisory urging passengers to understand key requirements—such as emptying metal water bottles before screening and preparing for different security rules at connecting international airports—to ensure a smooth and delay-free journey.
The installation of state-of-the-art CT scanner technology across London Heathrow Airport marks one of the most significant overhauls of UK airport security in decades. Traditional airport checkpoints required travelers to unpack liquids into 100ml containers stored inside 1-litre clear plastic bags and place laptops in separate trays, creating frequent queue bottlenecks during peak travel hours.
Heathrow’s upgraded CT security lanes utilize high-definition three-dimensional imaging to analyze bag contents from multiple angles. This technology provides security officers with enhanced threat detection capabilities while accelerating passenger processing. However, because international airports worldwide operate under varying timelines for scanner upgrades, travelers must remain mindful of differing security protocols across multi-leg journeys.
The most notable change for departing passengers is the expanded liquid threshold. Travelers at Heathrow can now pack liquids, aerosols, gels, and pastes in individual containers up to two litres within cabin baggage. Passengers no longer need to separate cosmetics, toiletries, or perfumes into small travel bottles or place them in transparent plastic bags. The advanced CT scanning equipment eliminates the need to remove large electronic devices from hand luggage. Passengers can keep key devices inside their cabin bags
