Originally Posted by
LondonAussie
I find it's really quite variable. On one occasion the UK border force agent did not even say a single word to me, he just swiped my passport, tapped a few keys and handed it back. On another occasion I was quizzed for a few minutes on where I'd been, where I live in the UK, how long I've lived there for, what I do for a job, etc.
This is my experience too, sometimes it's quick, other times it takes forever.