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Rollback of 100ml liquid restrictions: you can now take two litres at some airports

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Rob and I were both a bit perplexed this week when Edinburgh Airport sent us a press release saying that “passengers are now able to take liquids in containers of up to two litres through security.”

As you may remember, the UK Government has mandated that all UK airports install next-generation CT security scanners.

These devices, which are substantially bigger and heavier than the scanners they replace, are capable of scanning luggage in 3D and determining the density of materials including liquids. Older X-Ray machines only produce 2D images of luggage.

Rollback of 100ml liquids restrictions: you can now take 2 litres+ at some airports

It meant that liquids no longer had to be removed from bags for scanning. The machines and their operatives would be able to remotely sense whether they contained explosives or not.

The UK Goverment announced a deadline of December 2022 for airports to replace their scanners with the new CT technology. This was extended to June 2024 after covid caused significant disruption and airports claimed that they couldn’t comply with the rules in time.

Teesside International Airport became the first in the UK to install the new scanners in all security lanes in January 2023. It was followed by other small airports, including London City Airport, where only a handful of scanners had to be replaced.

Larger airports struggled with the rollout. The new scanners are so heavy that it is not simply a case of swapping them out. In some cases, terminal floors had to be strengthened.

“Heathrow has more security scanners than all other UK airports combined and there were infrastructure changes that had to be implemented (like strengthening floors). We also planned the works to ensure it didn’t disrupt the live passenger operation (the past couple of years of which have been the busiest we’ve ever seen).”

Heathrow, Gatwick, Stansted, Manchester and East Midlands airports all failed to meet the revised deadline of June 2024. Heathrow has still not fully rolled out the new machines on all lanes, although it is getting there with “the vast majority of passengers using new security lanes.”

Rollback of 100ml liquids restrictions

Disappointingly, the Government rushed out a new directive in June 2024 instructing all airports – including those with newly upgraded scanners – to continue enforcing the 100ml liquids rule. The rollback was rushed, with initial confusion around whether liquids could stay in bags or not (they could).

The Department for Transport claimed that the change was not due to an imminent security threat but because of concerns over the reliability of the new scanners. The EU followed suit three months later in September 2024, citing a similar “temporary technical issue” with the new scanners.

Whatever the temporary issue was, it now appears to have been solved. Without issuing a press release, the Department for Transport has informed airports that they can lift the 100ml rules once their scanners have been installed and approved.

This will be done in a piecemeal fashion, at the discretion of each airport, which will add to the confusion over the peak summer travel season.

So far, only Birmingham and Edinburgh airports have confirmed they are no longer enforcing the 100ml rule. According to Edinburgh Airport, “liquids can be left in bags and taken through security in bottles/containers of up to two litres.”

EDIT: Both Belfast airports are have also publicly adopted the new rules – this is confirmed on their websites.

EDIT: There are multiple reader comments below that London Gatwick has adopted the new 2l rule but is not making it public.

Remember that you may still be restricted on the liquids you can take on your return trip. Whilst some international airports have moved to the new scanners, including Amsterdam Schiphol, the EU is still mandating a 100ml limit for now.

Comments (71)

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  • Lumma says:

    My issue with these new scanners and leaving everything in, is that I’m often having my bag taken for secondary checks. I rarely, if ever had this happen with liquids and laptops out.

    • Antony Savvas says:

      On a trip to Las Vegas recently, my ‘dense’ notebook was pulled by the new scanners in Newcastle while packed in my small suitcase. On travelling back from Vegas, the same notebook packed the same way was not pulled. On landing at Heathrow, and then going through security transfer to Newcastle, that little dense book was pulled yet again. Let’s see what happens on my return trip to London next week…

      • Barrel for Scraping says:

        In Newcastle if they see anything dense in the scanner that have to check you’re not trying to smuggle a mackem through!

    • MKB says:

      Same for me.

      When I was following instructions to leave everything in my bag using the new scanners, the bag was sent for secondary screening every time, often with lengthy waits. Happened at least half a dozen times.

      I now ignore the instructions and remove my laptop from my trolley bag. No more secondary checks.

      The other issue causing me problems was my wallet in my jacket pocket. Too many cards packed tightly together, I was told. So that goes through in a separate tray now, and has stopped any further rejections by the new scanners.

      I never had any of these issues with the old scanners.

      • Ziggy says:

        Books and reams of paper almost always seem to trigger the new scanners (I had the pleasure of secondary screening at T5 First Wing recently thanks to a stack of books in my carry on).

        The reason this is happening (according to one of the screeners) is because densely packed paper can appear like a lot of money bundled up and they’re trying to catch money launderers. I’m not sure how true this is (I have doubts because it doesn’t explain why this wasn’t an issue in the older scanners which can “see” less than the new scanners), but that’s what I was told.

        • Lady London says:

          My nest of cables and computer accessories still gets pulled. I now put them out on the tray to save time and continued doing this with liquids as well.

        • John says:

          I carry large amounts of cash on every trip and it has not triggered a secondary with the old or new style scanners.

  • Nick says:

    Bag was selected for a laptop swab and wait was over 20 minutes! Nothing else was checked. Suspect this would not have happened when you had to empty it out of your bag! Security personnel were also very poor working extremely slowly!

  • Stuart says:

    Departed from Southampton on Thursday and the security area refurbishment looks to be mostly done with new scanners being used, so no removal of any items from my bag. I say ‘mostly’, as the walls still looked a bit like temporary boardings.

  • Ben says:

    My Smiths shares, which owns Smiths Detection, are doing well. Up 40% since January.

  • Dude. says:

    Thank you dundj for clearing this up.

    Seems to have hit a little nerve with our esteemed host.

    • dundj says:

      For me, it is understandable why someone may be perplexed by this, if you did not know the rationale behind it. Personally, I have been mildly surprised at the timing as it was not expected until after the Summer holiday period, and I was fully aware of the majority of the actions being taken, if not necessarily the reasons behind it. So, if I can explain in vague terms the details behind what has been taking place, then I’ll do my best.

    • Rhys says:

      The fact that this needed to be cleared up by someone in the comments of an aviation website I think proves our point. The rollout has not been clearly communicated at all, including for those of us following on!

      • dundj says:

        Fully agreed, and I would like to be less vague as well. If I knew the complete ins and outs of it, I’d likely not have said a word today.

        For me it’s peoples’ minor annoyance at a website which writes about aviation in the UK when it matters, after the points angles, aren’t aware as to why I gave out the information around what I am fully aware of to help understand your perplexity of the situation.

  • ADS says:

    I had a banana trigger a CT machine this week – again!

    remember that integral to the re-relaxed rules is:

    “If you are carrying metallic or double-walled containers (including vacuum flasks, thermos flasks and metallic water bottles), please ensure the container is empty prior to the security checkpoint”

  • John says:

    At EDI “fast track” security four weeks ago the 2L allowance/leaving liquids and electronics in bag was in effect but the conveyor belt on the new scanners (very prominently branded as Made in Italy) was jammed and not returning any empty trays to the start. Massive queue waiting for the many many staff to bother to manually carry a few empty trays to the start. Ended up walking off to another machine and bringing back an empty tray from there. Then a massive queue after the scanner waiting for bags which had been pulled to squeeze past the overflowing queue of bags which had been pulled. Dreadful designs. No queues at the non-fast track scanners.

    At GLA last week the “fast track” scanners were the old fashioned type, all of the non-“fast track” ones seemed to have been upgraded to the same new model as EDI (don’t think the relaxations were in effect there yet though).

  • John says:

    ^ “…bags which had HAD NOT been pulled to squeeze past the overflowing queue of bags which had been pulled…”

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