Originally Posted by SoEWR

So you’re telling me in 2023, it is entirely possible for someone to fly from another country, let’s hypothetically say the USA, fly to DUB and transit through to LHR and arrive in the UK with no immigration checks at all?

How is this legal and how is this loophole still a thing in 2023? Yes I know and understand the CTA agreement, but this seems like a massive potential security risk that almost anyone could easily exploit.