Travel rule all UK tourists should follow to avoid delays at airport security

When you go abroad, there are all sorts of travel rules people need to follow but a certain guideline is considered crucial. It’s vital to know if you want to avoid delays at airport security

All travellers have been urged to take note of a crucial airport rule, as ignoring it could lead to significant hold-ups at security. It’s well worth bearing in mind as the travel season is already well under way, with scores of Brits eager to head off on their holidays for some hard-earned sunshine and relaxation.

The rule was recently highlighted on TikTok by a travel agent named Jake, who regularly shares straight-talking tips online, and it’s something you may never have previously considered. It’s well worth familiarising yourself with this particular rule, as it could have a real impact on how long you end up waiting in the security queue.

It’s not the first travel tip of this nature to do the rounds recently, either. Previously, holidaymakers were warned to brace themselves for “hell” owing to mounting queues at a popular airport.

Jake said: “This is the number one reason for delays at airport security in the UK right now, and almost everyone has one in their bag. But, there’s one thing that’s catching everybody out.

“It’s these. Reusable, stainless steel water bottles because, while the 100ml rule has been scrapped, and for some airports you can take up to two litres of liquids with you, these still need to be emptied.

“That’s purely because the machines can’t check the liquid that’s in these bottles. So, if you do have one in your bag and it’s got liquid in, then you’re going to have your bag pulled aside.

“You’re going to have that embarrassing moment on the belt where you see your bag go down a different aisle. So, as you’re heading to security, make sure you empty these.

“The good news is though, if you do forget and you have your water bottle in there with liquid in, they’re not going to make you throw your expensive water bottle away. They’re just going to pour out the liquid that’s in there.

“So this is just going to cause further delays for you getting through duty-free and being able to relax before you get on your flight.”

It might seem like a straightforward tip, but it’s certainly one worth bearing in mind. Sticking to the rule could help you sidestep a major headache that’s easily avoidable.

What you need to know

What you might not realise is that you must fully empty your reusable water bottle before passing through airport security. While the 100ml liquid limit may not apply to the container itself, any liquid left inside is banned and could lead to your bottle being seized.

Even if your local airport permits larger liquid containers or doesn’t require you to remove electronics from your bag, metal or insulated bottles (such as Hydro Flasks or Yetis) typically need to be drained. The sophisticated scanners are unable to “see” through double-wall insulation, so it pays to stay one step ahead.

As Jake highlighted, certain airports now permit passengers to carry containers holding up to two litres of liquid in their hand luggage. However, this is entirely dependent on the specific airport you’re departing from, as it requires state-of-the-art 3D scanning technology.

For this reason, it’s always wise to check the regulations for your particular airport ahead of your journey. At major hubs including London Heathrow, London Gatwick, Birmingham and Edinburgh, you’re allowed to take containers holding up to two litres each.

That said, this rule only applies at select airports. If you’re in any doubt, always confirm with your airport before you travel.