Overview
- Heathrow says all security lanes across its four terminals now use CT scanners, allowing liquids in containers up to 2 litres to stay in bags along with laptops and tablets.
- The new systems create high‑resolution 3D images and apply automated algorithms with C3 certification to spot threats without passengers unpacking items.
- Heathrow frames the upgrade as a roughly £1 billion program and estimates the changes will cut nearly 16 million single‑use plastic bags annually.
- Airports adopting or trialing similar setups include Gatwick, Birmingham, Bristol, Belfast, Shannon, Donegal, and several in Italy, with select CT lanes operating at major US airports.
- Policies vary widely by location, and many airports still enforce 100 ml or 3.4‑ounce limits, so travelers are advised to check rules for each departure point.