I do wonder, due to the peculiarities of the Common Travel Area between Ireland and the UK, if the following hypothetical scenario is possible:
- A non-EU citizen flies Boston-Dublin-London with airside transit in Dublin. Will this non-EU citizen undergo an immigration check for the UK at any point? As airside transits, by nature, do not have immigration checks and the final flight (Dublin-London) does not have an immigration check upon arriving into the UK.
This scenario is completely hypothetical, but I just wonder if this happens in real life or not?