London Heathrow Airport has implemented a significant overhaul to its passenger screening process with the launch of next-generation CT security scanners across all terminals. The upgrade, which became fully operational on January 23, 2026, comes at a cost of £1 billion (approximately $1.36 billion) and allows travelers to keep liquids and large electronics in their hand luggage during security checks. This initiative aims to alleviate congestion and modernize a critical part of the airport experience.
The introduction of this advanced technology marks a pivotal shift in airport security protocols. For nearly two decades, passengers have been required to limit liquids to containers of no more than 100 ml and to unpack laptops for screening. These regulations were established following heightened security concerns in the mid-2000s. While they served their purpose, they often led to long lines and delays at major airports. The new CT scanners are expected to streamline the screening process, particularly during peak travel times.
Enhancing Passenger Experience with Advanced Technology
The newly installed CT scanners produce detailed three-dimensional images of cabin baggage, enabling security personnel to detect potential threats without requiring passengers to unpack their bags. This significant change means that liquids and electronic devices can remain inside carry-on luggage throughout the screening process. Although similar systems are being adopted in various locations, many airports have not yet achieved this level of implementation.
Heathrow anticipates that the removal of the need for bag preparation will result in a marked increase in screening efficiency, especially during busy morning and evening rush periods. In addition to improving passenger flow, the upgrade is projected to eliminate the use of nearly 16 million single-use plastic bags annually, contributing to environmental sustainability.
According to Heathrow CEO Thomas Woldbye, “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.”
Addressing Operational Challenges and Future Growth
The advancements in security technology come as part of a broader strategy to enhance operational resilience and passenger satisfaction. The security measures instituted in 2006 significantly reshaped global aviation, aiming to strengthen risk mitigation but also complicating airport screening processes. As passenger volumes surged, particularly at major hubs like Heathrow, the limitations of traditional manual inspections became increasingly apparent.
The introduction of CT technology directly addresses these issues by facilitating faster and more efficient security checks. This advancement allows passengers to navigate through checkpoints more quickly, easing the pressure on security lanes during busy travel periods. Airports worldwide are transitioning toward similar screening systems to meet the demands of recovering travel demand.
Heathrow’s full-scale rollout positions it as a benchmark for other large airports considering similar technological investments. Improved security screening not only enhances passenger experience but also supports on-time performance and reduces congestion throughout terminal infrastructure.
The transformation of Heathrow’s security measures is part of a long-term investment program aimed at fostering future growth while improving reliability. In 2025, Heathrow earned recognition as Europe’s most punctual hub, with over 97% of passengers clearing security in under five minutes. Baggage handling also saw improvements, achieving a load rate exceeding 98% and ensuring that an additional quarter of a million bags reached their intended flights compared to the previous year.
Despite the relaxed rules regarding liquids and electronics, standard restrictions on prohibited items remain in place. Passengers are advised to follow airline and airport guidance when packing their carry-on bags. Heathrow emphasizes that the new system balances robust security measures with a smoother travel experience, paving the way for a more efficient airport environment.
As the aviation industry moves forward, Heathrow’s investment in advanced security technology exemplifies a commitment to enhancing the passenger journey while addressing environmental concerns and operational efficiency.
