- I am Turkish citizen.
- I have Turkish Passport.
- I live in Germany.
- I have 2 years valid UK visa.
- I frequently fly from Germany to London.
And each time, the UK Border Police checks my documents, then takes my passport and German card then ask me to sit in a place guarded by a police. (I think it's not detention, but still a place they put truly suspicious people.) There they also gave me a paper which states which documents they held.
The last time, the border officer asked "In your earlier travels, did we took your documents and asked you to sit somewhere before?" I said "Yes, every time." Then he said "Well, I am about to do it again."
So now, I am curious. Why this keep happening to me? Is there any rule that applies to me?