Heathrow Airport has officially lifted the decades-old 100ml restriction on liquids in hand luggage, marking a milestone in modern air travel security and convenience. The move follows a £1 billion technology upgrade that equips the UK’s busiest airport with next-generation CT scanners capable of transforming the passenger screening experience.
With the new scanners now operational, travellers no longer need to remove liquids or electronic devices from their cabin bags. Each container can hold up to two litres, freeing passengers from the long-standing ritual of plastic bags, tiny bottles, and tedious unpacking at security.
The 100ml limit was introduced in 2006 after authorities thwarted a transatlantic bomb plot, sparking global restrictions on liquids, gels, and pastes in hand luggage. Heathrow’s newly installed computed tomography (CT) scanners generate detailed 3D images of luggage contents, allowing security officers to inspect items more efficiently and accurately. Similar technology has already been deployed at airports including Birmingham, Bristol, Gatwick, and Edinburgh.
“Every Heathrow passenger can now leave their liquids and laptops in their bags at security as we become the largest airport in the world to roll out the latest security scanning technology,” said Heathrow chief executive Thomas Woldbye. “That means less time preparing for checks and more time enjoying their journey.”
However, the change currently applies only to flights departing from Heathrow. Passengers travelling abroad are urged to verify rules at their destination airports, as limits on liquids may still apply elsewhere. Travel experts caution that while travellers can now carry larger toiletry containers outbound, they may not be allowed to bring them back through foreign airport security.
Security queues have long been plagued by delays caused by travellers misunderstanding liquid regulations. Heathrow estimates the new scanners will eliminate the use of nearly 16 million plastic bags each year—significantly reducing waste and speeding up security clearance.
The rollout comes after several postponed government deadlines. Large UK airports were initially required to install CT scanners by December 2022, but pandemic-related disruptions delayed implementation to June 2024. Even then, only a handful of smaller airports met the target. Later that year, the government reinstated the 100ml rule, citing the need for uniform standards—a move echoed by the European Union.
The result was a patchwork of inconsistent rules across UK airports. While some, such as London City, Luton, and Teesside, have already introduced the scanners, most still impose the older restrictions pending regulatory approval of their systems.
With Heathrow’s upgrade now complete, aviation leaders hope the transformation will set a new global benchmark for airport security—one that combines safety, efficiency, and passenger ease in equal measure.