Where does this conversation most probably take place?

W: Welcome to Britain. May I see your passport and papers, please?
M: Sure, here you are.
W: Thank you. How long do you plan to be here?
M: About seven months.
W: Where will you be staying?
M: Mostly in London, but of course I’ll visit some other places, such as Birmingham, Oxford, and Cambridge.
W: Fine, now I have to check your luggage.
M: Ok, I have two suitcases.
W: What’s in them?
M: Nothing but personal belongings.
W: All right. I hope you’ll have a nice stay here.
M: Thank you.