UK Hand Luggage Rules Explained (Sizes, Liquids & Restrictions)
Cabin bag sizes, the 100ml liquids rule and what you can and can't carry — a plain-English guide to UK hand luggage rules so you sail through security.
Hand luggage rules trip up even seasoned travellers because they vary by airline. Here's what stays constant and what to check before you fly.
Cabin bag sizes vary by airline
There's no single UK-wide size limit — each airline sets its own. Always check your airline's cabin dimensions and weight allowance before you pack, and note whether your fare includes an overhead-locker bag or only a small under-seat item.
The 100ml liquids rule
Liquids in hand luggage must be in containers of 100ml or less, all fitting inside one transparent, resealable bag. Some airports now have new scanners that relax this, but don't assume — pack to the 100ml rule to be safe.
What you can't take
Sharp objects, most tools, and anything resembling a weapon must go in the hold. E-cigarettes and spare lithium batteries, by contrast, must travel in your cabin bag, never checked luggage.
Pro tip: Take your liquids and large electronics out before you reach the scanner — it speeds up security for you and everyone behind you.
Medication and baby items
Essential medicines and baby food are allowed in larger quantities than 100ml, but declare them at security and carry supporting documentation for prescriptions.
The bottom line
Check your airline's size and weight limits, pack liquids to the 100ml rule, and keep restricted items out of your cabin bag. Do that and security is quick and painless.
