UK Airport Liquid Rules 2026: Where is the 100 ml Routine No Longer Enough?

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Alisa Oberan
CEO
19.08.2026 22:38

UK Airport Liquid Rules 2026: Where is the 100 ml Routine No Longer Enough?

Several major UK airports no longer follow the old 100 milliliter carry-on rule: according to official or updated passenger information from Heathrow, Gatwick, Birmingham, Bristol, Edinburgh, Belfast International, and Belfast City, departing passengers may, under certain conditions, carry liquid containers of up to 2 liters through security. However, the change is not uniform across the United Kingdom, which is why it is particularly important for Hungarian travelers to check not only their London departure but also their transfers and return journeys separately.

At first glance, the news may seem like a minor convenience, but in reality, it could affect many summer and autumn trips. For those flying from Budapest to London, Scotland, Northern Ireland, or further with a UK transfer using only carry-on luggage, the small transparent bag, 100 ml bottles, and packing larger cosmetics in checked luggage had been almost an automatic reflex. Now, however, the practice is different at an increasing number of UK airports: due to modern CT-based security scanning, liquids and electronic devices can remain in the bag in many places, and passenger guides now list a 2-liter container size instead of the previous 100 ml limit.

This does not mean that the 100 ml rule has disappeared from all UK or European airports. UK government information is also cautious: rules vary by airport, and in most places, liquid containers larger than 100 ml still cannot be taken through, but some airports may now allow containers of up to 2 liters. In other words, the new situation should not be interpreted as a single national relaxation applicable to every gate, but as an airport-specific system.

What has changed at UK airports?

The most important practical change is that at several major UK airports, departing passengers are no longer required to split all liquids into bottles under 100 ml. According to Heathrow's official passenger information, at terminals 2, 3, 4, and 5, liquids may be taken through security in containers of up to 2 liters, and can remain in carry-on luggage along with laptops and other larger electronic devices. The airport specifically notes that the new rule only applies to Heathrow: if someone returns from another airport, different regulations may apply there.

Gatwick is similarly important for Hungarian travelers, as it is a common option for many low-cost and connecting routes. Based on information from London Gatwick Airport, liquids, creams, gels, pastes, sprays, and aerosols no longer need to be in containers under 100 ml under certain conditions: the permitted container size can be up to 2 liters. At the same time, Gatwick specifically warns that metal or double-walled bottles must be emptied before security screening, and that the same rules are not necessarily in effect at other airports.

Bristol, Edinburgh, Birmingham, Belfast International, and Belfast City are also among the airports where, based on updated passenger information, the 2-liter liquid container may be the relevant limit. Bristol specifically highlights that liquids can remain in the bag, there is no need for a separate transparent plastic bag, and laptops and electronic devices do not need to be routinely removed. Edinburgh's official guide also states that liquids and electronic devices can remain in the bag, and liquid containers must be no more than 2 liters each. According to Birmingham's information, liquids, pastes, and gels may be carried in carry-on luggage in containers of up to 2 liters, and there is no separate item count limit as long as the carry-on luggage remains within the airline's size and weight rules.

Why should the new rule not be automatically applied to all UK airports?

The biggest risk for travelers right now is that the news is spreading too simply: "the 100 ml rule has ended at UK airports." This is inaccurate. London City Airport, for example, currently states that passengers may leave liquids in the bag, but they must be in containers of 100 ml or smaller. At other major airports, such as Manchester or Luton, consumer protection and travel summaries also warn that the 100 ml container size may still be in effect, even if the passenger no longer needs to put everything in a separate bag.

This duality is particularly important for those flying from Budapest to Heathrow, Budapest to Gatwick, or Budapest to Stansted, and then continuing from another UK or European airport. It may happen that a 300 ml shampoo, a larger sunscreen, or a normal-sized drink passes through the UK departure security check, but on the way home, at a Mediterranean or Central European airport, the same item is no longer allowed in carry-on luggage.

Hungarian travelers should therefore check three separate points: the rules of the departing airport in Budapest, the rules of the departing or transfer airport in the UK, and the regulations of the return airport. If the trip consists of several separate bookings, this is even more important, as in a self-organized transfer, the passenger often leaves the transit zone and then goes through security again.

What does this mean for carry-on travelers?

The most tangible benefit of the change is for those traveling with carry-on luggage. If someone departs from an airport where the 2-liter rule is already in effect, they no longer need to transfer every cosmetic into small travel bottles. This can be more convenient for families, those going on longer city visits, travelers attending sports events or conferences, and those carrying special skincare, contact lens, or health products.

At the same time, the relaxation does not exempt one from other security and airline rules. The size and weight of carry-on luggage still depend on the conditions of the given airline. A 1 or 2-liter liquid container quickly increases the weight of the bag, and if the passenger flies with a low-cost ticket and only a small personal item, the security rule alone does not mean that the airline will also accept a larger or heavier bag on board. In other words, it is not enough to see if the airport allows the liquid; one must also check if the bag complies with the ticket type.

Another common misunderstanding is the issue of metal flasks and thermos bottles. Several UK airports, including Heathrow, Gatwick, and Bristol, indicate that under the new system, metal or insulated bottles must be emptied before screening. This does not mean that the flask is forbidden, but that it must be carried empty and can then be refilled after security screening. This is particularly important for summer travel, when many people want to bring their own bottle of water.

Most misunderstandings occur during transfers and return journeys

The practical impact of the UK relaxation is most complex when the trip is not a simple round trip between the same airports. If someone, for example, flies through London to North America, Ireland, or a UK domestic destination, they must check separately whether the transfer is in transit, whether they need to go through security again, and whether the onward flight has separate destination regulations. Heathrow, for example, specifically warns that for some destinations, such as Australia, different restrictions on liquid or powder-based products may apply.

It is even easier to make a mistake on the way home. If someone buys a larger cosmetic, drink, or local food in London, they may be able to keep it in their carry-on luggage without trouble at the UK departure. But if the same product must be screened again at another country's airport, for example, due to a broken journey, separate ticket transfer, or return trip, the local rule decides again. Security staff will not look at whether the product previously passed through Gatwick or Heathrow, but whether it is permitted at that specific checkpoint.

It is also worth being cautious with duty-free shopping. A sealed security bag and a visible receipt can help in many cases, but not every transfer situation is the same. For those touching multiple airports, especially with separate tickets, it is advisable to buy more expensive or larger liquids at the last departing airport or transport them in checked luggage.

Practical tips for Hungarian travelers

  • Check the airport, not the country. According to the UK government guide, liquid rules vary by airport, so the rules of Heathrow, Gatwick, Bristol, or Edinburgh are not automatically applicable to London City, Manchester, Luton, or the European airport for the return trip.
  • Look for information regarding "departing passengers." Rules generally apply to departing passengers passing through security. The situation may be different upon arrival, transfer, and re-screening.
  • Empty metal or insulated bottles. Several airports specifically request that metal flasks or double-walled bottles pass through screening empty.
  • Do not forget the airline's size and weight limits. Airport liquid rules do not override the carry-on luggage pricing, size, or weight limits.
  • Keep the 100 ml backup plan for the return trip. If unsure, smaller travel bottles and a transparent bag remain the safest, lowest-risk solution.

Why is this important for the Hungarian market?

London and the United Kingdom remain one of the most important European destinations for Hungarian travelers: many use UK airports for city visits, family visits, business trips, study trips, and distant transfers. In the traffic between Budapest Airport and London airports, there are particularly many passengers who travel with only carry-on luggage because they are going on a short trip or are looking for lower fares. For them, the liquid rule is not a theoretical question: it affects what can be packed, whether checked luggage is needed, whether it is worth counting on airport shopping, and how much time should be left for screening.

The change also concerns the airport experience. If liquids and electronics can remain in the bag, it theoretically means a faster and less stressful security process. In practice, however, the new technology may bring more sensitive scanning, which may result in manual checks for certain items. Therefore, the best strategy is not for the passenger to arrive at the last minute, but to pack the bag transparently, keep larger liquids in well-sealable containers, and continue to allow time for security screening.

Summary

UK airport liquid rules in 2026 can no longer be described in a single sentence. Several important airports, including Heathrow, Gatwick, Birmingham, Bristol, Edinburgh, and the two main airports of Belfast, may now apply a much more flexible carry-on rule for liquids, but the 100 ml limit may still exist at other airports. For Hungarian travelers, the safe conclusion is simple: always check the official website of the specific airport before departure, do not automatically apply the UK relaxation to the return trip, and in case of doubt, 100 ml packaging remains the safest solution.

Those traveling to London should also check the related airport information before the flight: the pages of London Heathrow Airport, London Gatwick Airport, and London Stansted Airport can help in planning the route, airport departure, and any potential transfers. The point is not that everyone should start their journey with larger bottles, but that no one should be surprised at security screening.