New rules permitting small amounts of liquids in hand luggage on European and UK flights are coming into effect.
Passengers will be able to carry drinks and toiletries through airport security, but only in small amounts.
Liquids will be limited to 100ml per container and no more containers than would fit in a one-litre plastic bag.
The restrictions - brought in over fears that liquids could be used to make explosives - will be the same across the EU and may cause delays.
Airport officials say staff have been undergoing training and will be on duty to advise people in check-in queues about the latest changes.
The UK imposed curbs on liquids in August after police said they had foiled an alleged terror plot to bring down as many as 10 planes travelling from the UK to the US.
Re-sealable bag
While restrictions on hand luggage sizes brought in at UK airports in August were relaxed the following month, most liquid items have been banned from hand luggage until now.
Some European countries introduced similar regulations, but now all 25 EU countries, plus Switzerland, Norway and Iceland, will have to impose the same rules as minimum standards. Countries can use even tighter rules if they wish.
The new rules require the liquid containers containing items such as toothpaste, cosmetics and shaving foam be carried in a clear plastic, re-sealable bag that does not exceed
First published on BBC website|
The bag containing the liquids will be X-rayed separately