Yes. Since Heathrow finished rolling out new CT security scanners in January 2026, you can carry your own alcohol through security at all four terminals in containers of up to 2 litres each, kept inside your cabin bag. This replaced the old 100ml-per-container rule. It does not mean you can drink it on the plane, and it does not change the rules for duty-free bottles bought airside or for flying home through an airport that has not upgraded its scanners. Checked 2026.
The short version
Heathrow now screens liquids with CT (computed tomography) scanners at every terminal, the same technology used in hospital body scans. They can see inside containers in enough detail that passengers no longer need to decant drinks into 100ml bottles or bag them separately. A full bottle of wine, a hip flask of spirits, or a six-pack of beer in your hand luggage are all fine for security purposes, provided each individual container holds no more than 2 litres. There is no published cap on the total number of containers, but your airline's own cabin bag size and weight allowance is the real practical limit, not Heathrow's security rule.
This 2-litre rule covers liquids generally, not just alcohol, and sits alongside Heathrow's two-bag hand luggage policy. For the full detail on bag sizes and the wider liquids rule, see Heathrow's hand luggage rules guide.
Your own alcohol vs duty-free alcohol: different rules
It matters whether the bottle came from home or from an airside shop.
Alcohol you packed at home or bought before security can go through the checkpoint in its original or any container up to 2 litres, exactly like any other liquid. Security staff will screen it in the scanner along with the rest of your bag.
Alcohol bought in a Heathrow duty-free or airside shop after security is handled differently. It is sealed into a security tamper-evident bag (STEB) at the till, with your receipt visible inside the bag. You must keep it sealed until you reach your final destination, because opening it, or transferring through another airport, can mean it gets confiscated at the next security check. For the actual duty-free allowances on spirits, wine and beer when you land, see Heathrow's duty-free allowance guide.
Can you drink alcohol you brought through security on the plane?
No, generally not. UK and most international airlines prohibit passengers from consuming their own alcohol on board, whether it came through security in your hand luggage or was bought duty-free. Cabin crew are legally responsible for who is served alcohol and how much, and most carriers' conditions of carriage explicitly ban drinking your own supply during the flight. If you want a drink in the air, you buy it from the cabin crew. This rule exists everywhere, not just at Heathrow, and gate staff or crew can refuse boarding or confiscate a bottle if a passenger is found drinking their own alcohol mid-flight.
The connecting flight catch
This is the part most people miss. Heathrow's 2-litre rule only applies to security screening at Heathrow itself. If you are connecting onward through an airport that has not upgraded to CT scanners, which as of 2026 is still most airports worldwide, that airport's old 100ml liquids limit applies at its security checkpoint, even to a sealed duty-free STEB bag bought at Heathrow.
In practice: a bottle of spirits bought duty-free at Heathrow and carried in an unopened STEB bag with your receipt is usually accepted through a connecting airport's security under the international duty-free liquid exemption, provided the bag is intact and the connection happens within a reasonable window (commonly cited as 24 hours, though this varies by airport and country). A bottle of your own wine from home, packed loose in your cabin bag and already over 100ml, is a different matter: if your connecting airport has not adopted the 2-litre rule, it can be confiscated at that airport's security re-screening, since its staff are enforcing their own limit, not Heathrow's.
If your itinerary involves any connection, check the departure airport's rules before you fly back, and when in doubt, pack alcohol you plan to carry in checked baggage instead for that leg.
Checked baggage: a simpler option for larger quantities
Airlines generally allow alcohol in checked luggage without the liquids restrictions that apply in the cabin, subject to two practical limits: most airlines cap alcohol over 24% ABV at around 5 litres per passenger in checked bags (and some will not carry spirits above 70% ABV at all), and the bottles still need to be well packed to survive handling. If you are bringing back a case of wine or several bottles of spirits, checked baggage avoids the whole cabin-liquids question entirely. Always check your specific airline's dangerous goods policy, since limits vary by carrier.
Heathrow alcohol and security: quick comparison
| Scenario | Allowed through Heathrow security? | Key condition |
|---|---|---|
| Own bottle, up to 2 litres, in cabin bag | Yes | Container must be 2 litres or under |
| Duty-free bottle bought airside | Yes, as hand luggage | Must stay sealed in its STEB bag with receipt |
| Drinking your own alcohol on board | No | Airlines require crew to serve all alcohol consumed |
| Connecting through a non-upgraded airport | Depends on that airport's own 100ml rule | STEB duty-free bags usually exempt; loose bottles may not be |
| Alcohol over 70% ABV | Not in cabin or hold on most airlines | Check your airline; often banned outright |
| Large quantities (a case of wine, etc) | Better in checked baggage | Subject to airline's per-passenger litre cap |
FAQs
Can I bring a bottle of wine through Heathrow security?
Yes. Since Heathrow's 2026 scanner upgrade, any single liquid container of up to 2 litres, including a full bottle of wine, can go through security inside your cabin bag.
Is there a limit on how much alcohol I can carry in hand luggage at Heathrow?
Heathrow does not publish a cap on the number of 2-litre containers, but your airline's cabin bag size and weight allowance limits how much you can realistically carry. Checked baggage is the practical option for larger quantities.
Can I drink the alcohol I bring through security once I'm on the plane?
No. Airlines require all alcohol consumed in flight to be served by cabin crew, and drinking your own supply on board is against most carriers' conditions of carriage.
Will my duty-free alcohol be confiscated if I have a connecting flight?
It depends on the connecting airport. A sealed STEB bag with your receipt is usually accepted under international rules, but an unsealed bottle or one from a non-STEB source can be confiscated at an airport that still enforces the 100ml liquids limit.
Does the 2-litre rule apply at every Heathrow terminal?
Yes. The CT scanner rollout and 2-litre liquids limit cover Terminals 2, 3, 4 and 5.
Can I pack alcohol in my checked luggage instead?
Yes, and it avoids the cabin liquids question. Most airlines cap alcohol over 24% ABV at around 5 litres per passenger in the hold and may refuse spirits above 70% ABV, so check your airline's policy for larger amounts.