People should check their specific airport before travelling this summer
Different UK airports might have different rules in place this summer (stock image)(Image: Getty Images)
Airports in the UK have slightly different rules that could catch some travellers out this summer if they do not check them before packing. Certain airports have been upgraded to help relax a major security rule, while others have yet to make any changes.
The 100ml liquid-limit security rule means passengers can only bring liquids in containers of 100ml or less in hand luggage. The rule was put in place back in 2006 when police foiled a major terrorist plot, which prevented a group that planned to smuggle liquid explosives on board a flight leaving London that was bound for North America.
At the time, standard airport security X-ray machines were designed to detect metal weapons (such as guns and knives) and solid explosives, with no way to distinguish between a simple bottle of water and volatile liquids. For years, the rule has remained in place for the vast majority of airports.
But in 2022, the Government confirmed plans to relax the rules. As technology has advanced, some airports are relaxing the rules in 2026.
Certain UK airports featuring new 3D security scanners now allow passengers to carry liquids, gels, and aerosols in individual containers that can hold up to two litres (2000ml). These airports allow you to leave liquids in your hand luggage without needing clear plastic bags.
As of July 15, 2026, the following airports have fully upgraded their systems to include new scanners that officially allow passengers to carry liquids in containers up to two litres in their hand luggage:
- London Heathrow (All Terminals)
- London Gatwick
- Birmingham
- Bristol
- Edinburgh
- Belfast International
- Belfast City
- Teesside International
Even at these hubs, reusable metal, insulated, or double-walled vacuum bottles must be empty when passing through security. You can refill them once you are inside the departure lounge.
Every other UK airport has yet to follow suit with the change, and still follows the commonly known limit of 100ml. But even with the same cap on liquids, certain airports have different ways of letting items through security.
For example. certain airports remain the same as last summer, where passengers need to use 100ml containers and place them in a clear, resealable plastic bag for scanning. These airports include:
- London Stansted
- London Luton
- Glasgow International
- East Midlands
- Liverpool John Lennon
- Cardiff
But, certain airports have relaxed the rules slightly. Although the strict limit on the amount of liquids is still in place, passengers can keep their liquids and electronics inside their bags for processing at these airports:
- London City
- Manchester
- Newcastle
- Leeds Bradford
- Aberdeen
- Southend
Why aren’t all airports changing at once?
The UK Government’s original goal was a blanket lifting of the 100ml rule, but issues arose, meaning the change had to be implemented gradually. To prevent massive security bottlenecks during the peak summer rush, the Department of Transport has largely frozen rule changes at airports that haven’t yet reached 100% compliance.
Major remaining hubs, such as Stansted, Luton, and Manchester, are continually updating their lanes behind the scenes. Gradual transitions to the “in-bag” rules are expected to resume late autumn/winter 2026 as travel volume drops.
People have been reminded to think before they start maxxing out their luggage limit, as their return journey could be what catches them out. Even if you fly out of a 2L-friendly airport like Heathrow, most international destinations still enforce the strict 100ml rule, so if you buy full-sized toiletries in the UK, you may have to check them into hold luggage on the way back or throw any leftovers away before coming home.