
Heathrow Airport has some of the most restrictive security measures in the world, including strict rules on liquids. Liquids, gels, and aerosols are only permitted in hand luggage if they are in containers of 100ml or less and placed in a transparent, resealable plastic bag. This bag must be no larger than 1 litre in capacity and must be sealed. Liquids purchased after passing through security can be taken on board, but restrictions may apply if you are stopping en route or returning on the same day.
| Characteristics | Values |
|---|---|
| Container size | Liquids in containers over 100ml are not permitted through security. |
| Container type | Liquids must be placed in a transparent, re-sealable plastic bag, no bigger than 1 litre capacity. |
| Container dimensions | The maximum dimensions of the bag are: 20cm x 20cm. |
| Number of bags | One liquid bag per person is allowed. |
| Duty-free liquids | Duty-free liquids must be sealed at the time of purchase with the receipt inside a security tamper-evident bag. |
| Liquid medicines | Liquid medicines are allowed in quantities exceeding 100ml if needed during the flight and with documentary proof. |
| Baby food | Breast milk can be carried in quantities greater than 100ml when stored in a clear, transparent container or bag. |
| Explosive/flammable liquids | Explosive or flammable liquids are not permitted in hand or hold luggage. |
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What You'll Learn
- Liquids, aerosols, gels, and pastes are permitted in containers up to 100ml
- All liquids must be placed in a transparent, re-sealable plastic bag, no bigger than 1 litre
- Liquid medicines are allowed in quantities exceeding 100ml, if required during the flight
- Baby food and milk are exempt from the 100ml rule, but formula milk is not
- Liquids bought after security can be taken on board, including duty-free drinks, fragrances and cosmetics over 100ml

Liquids, aerosols, gels, and pastes are permitted in containers up to 100ml
Liquid medicines are exempt from the 100ml rule, but only if they are needed during the flight. You may need to present a prescription or a letter from a medical practitioner confirming this. Security officers may also need to carry out additional checks on these items.
Breast milk can also be carried in the cabin in quantities greater than 100ml, but it must be stored in a clear, transparent container or bag with a volume of no more than 2 litres. It should be in liquid form, not frozen.
Duty-free liquids, aerosols, and gels purchased after security can be carried as hand baggage, but they must be sealed at the time of purchase with the receipt inside a security tamper-evident bag.
Heathrow is known for its strict security measures, and it is always important to check and follow the rules when travelling through the airport.
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All liquids must be placed in a transparent, re-sealable plastic bag, no bigger than 1 litre
Heathrow Airport has strict rules regarding liquids. All liquids must be placed in a transparent, re-sealable plastic bag, no bigger than 1 litre. This includes liquids, aerosols, gels and pastes, which must be in containers of no more than 100ml in volume. This rule is strictly enforced, and passengers are advised to prepare accordingly.
The plastic bag containing liquids must be presented separately during security screening, along with electrical items. Liquids that do not meet these requirements will be confiscated, and passengers are advised to place only essential items in their hand luggage to save time. This means that travellers should be mindful of packing liquids in their hand luggage and ensure they follow the guidelines.
It is worth noting that some liquids are exempt from the 100ml rule. These include baby food and breast milk, which can be carried in containers or bags of up to 2 litres. Liquid medicines are also exempt, but only if they are required during the flight and are accompanied by documentary proof, such as a prescription.
Additionally, Heathrow Airport is upgrading its security equipment, and new high-tech security scanners may soon replace the current liquid restrictions. However, until these changes are implemented, passengers should continue to follow the existing liquid rules.
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Liquid medicines are allowed in quantities exceeding 100ml, if required during the flight
Heathrow Airport, like most airports, does not permit liquids in containers larger than 100ml through security. This rule applies to liquids of all kinds, including drinks, fragrances, cosmetics, and other items such as pastes and gels. These liquids must be placed in a transparent, re-sealable plastic bag, no bigger than 1 litre in capacity.
However, there are certain exemptions to this rule. Liquid medicines are allowed in quantities exceeding 100ml, provided they are essential during the flight. You may be required to present a prescription, and security officers may carry out additional checks on these items. If you are travelling with an infant, you are allowed to carry breast milk in quantities greater than 100ml, as long as it is stored in a clear, transparent container or bag. The volume of each container or bag should not exceed 2 litres, and the milk should be in liquid form, not frozen.
It is important to note that these rules may vary depending on your destination and specific airline. For example, if you are stopping over at another airport en route to your final destination, you may have to pass through additional security checks at the connecting airport, which may have different regulations regarding liquids. Similarly, if you are returning on the same day, there may be restrictions on the sale of liquids at Heathrow, as you will need to pass through security again at your destination airport.
To ensure a smooth journey through airport security, it is recommended that you only carry valuables and items essential for your flight in your hand baggage. If you are unsure about a particular item, it is best to pack it in your hold baggage instead.
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Baby food and milk are exempt from the 100ml rule, but formula milk is not
Liquids, gels, and aerosols in containers larger than 100ml are typically not permitted through security at Heathrow Airport. However, there are exceptions to this rule for certain items, including baby food and milk.
Breast milk, formula, and baby food are considered medically necessary liquids and are therefore exempt from the standard liquid restrictions at airports. This means that parents or guardians travelling with infants or young children can carry these items in quantities greater than 100ml in their carry-on baggage. It is important to note that this exemption only applies to breast milk when travelling without an infant, and does not extend to formula milk or other baby juice/food in these circumstances.
When travelling with breast milk, it should be stored in a clear, transparent container or bag with a volume not exceeding 2 litres. It should be in liquid form and not frozen. To expedite the screening process, it is recommended that breast milk be transported in clear, translucent bottles rather than plastic bags or pouches, as these may require alternate screening methods. Additionally, ice packs, freezer packs, and gel packs used to cool breast milk or formula are allowed in carry-on baggage, regardless of whether an infant is present. These cooling accessories may be subject to separate screening if they are partially frozen or slushy.
While baby food and milk are generally exempt from the 100ml rule, it is always advisable to check with your airline, as individual hand baggage allowances can vary. Additionally, for some destinations, restrictions may apply to the sale of liquids if you are stopping en route after departing from Heathrow, as you will need to pass through security again at the connecting airport.
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Liquids bought after security can be taken on board, including duty-free drinks, fragrances and cosmetics over 100ml
Heathrow Airport has some of the most restrictive security measures in the world when it comes to liquids. Liquids in containers over 100ml will not be permitted through security and must be packed in hold baggage instead. This includes duty-free drinks, fragrances, and cosmetics. However, there are some exceptions to this rule. For example, baby food or baby milk can be carried in the cabin, as long as it is stored in a clear, transparent container or bag with a volume of no more than 2 litres. Breast milk should be in liquid form and not frozen. Liquid medicines are also exempt from the 100ml rule, but only if they are needed during the flight and are accompanied by documentary proof, such as a prescription.
That being said, liquids bought after airport security can be taken on board the aircraft, even if they are over 100ml. This includes duty-free drinks, fragrances, and cosmetics. However, there may be restrictions on certain liquids if you are stopping en route after Heathrow or returning on the same day. This is because you will need to pass through security again at the connecting or return airport, and not all airports have the same rules as Heathrow. To be sure, it is recommended that you ask shop staff at Heathrow about any restrictions that may apply to your specific situation.
It is worth noting that Heathrow is in the process of upgrading its security equipment, which may eventually result in more relaxed liquid restrictions. However, until these upgrades are complete, passengers should continue to follow the existing liquid restrictions when passing through Heathrow Airport. These restrictions are taken very seriously by security staff, and failure to comply may result in the confiscation of liquids and other items.
To comply with the current liquid restrictions at Heathrow Airport, any liquids, aerosols, gels, or pastes must be in containers no larger than 100ml and placed in a transparent, re-sealable plastic bag no bigger than 1 litre in capacity. This bag must be removed from cabin baggage and placed in a tray for processing through security. It is important to note that explosive, flammable, or toxic liquids are not permitted in hand or hold luggage at Heathrow Airport.
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Frequently asked questions
Liquids, aerosols, gels and pastes are permitted in containers up to 100ml in a 1-litre clear plastic bag. This bag should be removed from your cabin baggage and placed in a tray to be processed through security.
Yes, liquid medicines are allowed in quantities greater than 100ml if they are needed during the flight. You will need to provide documentary proof of authenticity, such as a prescription. Breast milk is also allowed in quantities greater than 100ml when stored in a clear, transparent container or bag.
Yes, liquids purchased after passing through security can be taken on board the aircraft. These liquids must be sealed at the time of purchase with the receipt inside a security tamper-evident bag.











































