Airport security is the part of the journey most passengers dread — but with a little preparation it need not be stressful. Here is everything you need to know before you reach the queue.
The liquids rule
All liquids, gels, and pastes must be in containers of 100ml or less, and all containers must fit inside a single transparent, resealable plastic bag no larger than 20cm × 20cm. Each passenger is allowed one bag. This applies to toiletries, drinks, food items such as jam or peanut butter, and even lip balm. Anything over 100ml will be confiscated at the checkpoint, so decant into travel-sized bottles before you leave home.
Preparing before you reach the tray
The biggest cause of slow queues is passengers who are not ready when they reach the belt. Before you join the queue, move your liquids bag to the top of your hand luggage, put your laptop or tablet in an easy-to-reach pocket, and wear shoes that slip off easily. Remove your belt, watch, and any loose change and put them in your bag rather than a tray — it is faster and means nothing gets left behind.
Body scanners and pat-downs
Most major UK airports now use millimetre-wave body scanners rather than traditional metal-detector arches. You will be asked to stand with your arms raised for a few seconds. If the scanner flags something, a same-sex officer will carry out a targeted pat-down. This is routine and does not indicate suspicion. If you have a medical implant such as a pacemaker or joint replacement, inform the officer before you go through — you may be directed to an alternative screening method.
Laptops and large electronics
Laptops and tablets larger than a standard paperback must be removed from your bag and placed in a separate tray. This is one of the most commonly forgotten steps. Some airports have introduced CT scanners that can screen electronics inside bags, but until these are universal it is safest to assume you will need to remove them.
Fast-track security
Most UK airports offer a fast-track security lane for a fee, typically £5–£10 per person. It is worth considering if you are travelling with young children, have reduced mobility, or are cutting it fine on time. Some airline tickets and lounge memberships include fast-track as standard — check before you pay. Priority Pass and Amex Platinum cardholders often receive it free at certain airports.
Quick tips
Arrive at the security queue at least 90 minutes before a short-haul departure and two hours before long-haul. Avoid packing food items that could be mistaken for liquids — hummus, yoghurt, and soup will be confiscated. If you are travelling with a baby, formula, breast milk, and baby food are exempt from the liquids rule but must be declared. Medication is also exempt but carry a prescription or doctor's letter for anything that might raise questions.