Heathrow Scraps 100ml Liquid Limit Following £1 Billion Security Overhaul

Heathrow Airport has officially announced the completion of a massive security upgrade across all four of its terminals, marking the end of the restrictive 100ml liquid limit for departing passengers. According to an official press release issued on January 23, 2026, the airport has finalized a £1 billion investment to install next-generation Computed Tomography (CT) scanners, positioning itself as the largest airport in the world to fully deploy this technology across its entire operation.

The upgrade fundamentally changes the pre-flight experience for millions of travelers. Under the new regulations, passengers departing from Heathrow can now carry liquids in containers of up to 2 liters in their hand luggage. Additionally, large electronic devices such as laptops and tablets no longer need to be removed from bags during screening. The airport states that this move will not only streamline the security process but also significantly reduce single-use plastic waste.

Next-Generation Security Technology

The core of this upgrade involves the installation of advanced CT scanners, similar to technology used in medical environments. These machines generate detailed 3D images of cabin baggage, allowing security officers to rotate and analyze the contents on-screen without requiring passengers to physically separate items.

In its announcement, Heathrow confirmed that the requirement to place liquids in clear plastic bags has been eliminated. This operational shift is expected to have a substantial environmental impact. The airport estimates that removing the plastic bag mandate will save approximately 16 million single-use plastic bags annually.

Operational Efficiency Gains

Data released by the airport suggests the new technology is already delivering performance improvements. Heathrow reported that in 2025, it was named “Europe’s most punctual hub airport.” During that period, more than 97% of passengers waited less than five minutes for security screening. Furthermore, the airport noted that its baggage load rate improved to over 98% in 2025, indicating a reduction in missed bags.

Thomas Woldbye, CEO of Heathrow, highlighted the significance of the milestone in a statement included in the press release:

“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. That means less time preparing for security and more time enjoying their journey, and millions fewer single-use plastic bags. This billion pound investment means our customers can be confident they will continue to have a great experience at Heathrow.”

AirPro News Analysis: Context and Traveler Advisory

While the completion of this project is a major achievement for UK aviation infrastructure, it comes after significant industry-wide delays. The UK government originally set a deadline of June 2024 for major airports to install this technology. Like Gatwick, Manchester, and Stansted, Heathrow faced logistical hurdles, including supply chain issues and the need to reinforce floors to support the heavy scanners, that pushed the completion date to January 2026.

The “One-Way” Rule Caveat

Travelers must remain vigilant regarding the limitations of this new rule. The ability to carry liquids up to 2 liters applies only to passengers departing from Heathrow. Many international destinations, as well as other airports within the UK and EU, may not have completed their upgrades.

Passengers transferring through other hubs or returning to Heathrow from airports without CT scanners will still be subject to the traditional 100ml liquid limit. Consequently, purchasing large liquids duty-free or packing full-sized toiletries in carry-on luggage could result in confiscation at the return airport or a connecting security checkpoint. We recommend checking the specific security regulations of all airports on your itinerary before packing.

Frequently Asked Questions

Do I still need to put liquids in a plastic bag at Heathrow?
No. The requirement to use clear plastic bags for liquids has been eliminated for departures from Heathrow.

What is the new liquid limit?
Passengers can now carry liquids in containers of up to 2 liters in their hand luggage.

Do I need to take my laptop out of my bag?
No. Laptops, tablets, and other large electronics can remain inside your cabin baggage during the screening process.

Does this apply to my return flight?
Not necessarily. These rules apply to departures from Heathrow. You must check the rules of the airport you are flying back from, as many still enforce the 100ml limit.

Sources

• Heathrow Airport Press Release