My first boss used to do a short quiz just to weed out anyone that was wasting his time and that was that. But of course programming culture is hypertoxic so that's been turned into the roommate interview scene in Shallow Grave.
Indian developers in the UK have essentially got won the Willy Wonka Gold ticket as the salaries in the UK are much higher and they just work 12+ hours a day and keep their heads down. There is a higher number of female developers in my experience come over. But that could be just my impressions.
However my experience with a couple of UK programmers was they were alright.
[1] Except for game developers and embedded.