London · United Kingdom · IATA LHR · ICAO EGLL
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At LHR · the three rule systems
Security · Airline · Border
London Heathrow: containers up to 2L (exceptions: Flights to Australia: liquids in containers over 100ml can't be taken.).
Your airline's cabin-bag size and weight limits still apply on top of security rules.
Customs and import rules depend on where you land and what you carry — this airport page doesn't cover them.
Three separate rule systems · Any one can stop your item
Some liquids are fine through airport security but restricted by customs, biosecurity, alcohol duty, medicine rules or destination law.
Some prescription medicines, hormone gels, syrups and controlled drugs need documentation or prior approval before travel.
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Deeper reading for travellers flying from London.
A short checklist for this trip — pack what you need to stay within the rules above.
Larger liquids allowed here — bring what you need.
Liquid Limits is a travel planning tool, not an official aviation source. Always check official airport or aviation security guidance before travel.