Something that my husband I and noticed when we were in Liverpool:
When we were just sitting around waiting for me to get my passport back with the stamp, we were being nosy and watching the other people make their applications. At one window, there was a British man with a much younger Asian woman. The woman did not say a word; the man was speaking about her as if she were an object, asking questions like "If she gets sick, can I take her to the doctor"--i.e. if she breaks, can I get her fixed?
When I made my application, I did all the talking; after all, it was my application. My husband's job was, basically, to help me carry my things. My husband made a comment about how she was obviously a mail order bride.
The couple just got sent to wait for her passport stamp, along with everybody else. They didn't have to go through any special procedures, extra interviews, or anything. I would have liked for the woman to have been taken aside and interviewed separately--asked if she were alright, if she were being coerced, etc.