Re: It's not a sink
I find the dinner / tea debate an oddity, and other peoples experiences may differ of course.
I've worked all around the UK, and I find it interesting that even in the North, when in the office, the meal in the middle of the day tends to get referred to as lunch. But start talking about meals outside of office hours, and it's back to dinner and tea, no such thing as lunch.
People seem to have office speak mode, and then their off-duty, back home, with friends mode.
Just an observation. (and for ref, I'm a born and bred notherner).