Actually, I do have one. Is it true that restaurants or stores don't sell iced tea? I read in an anthropology book that, in America during the revolutionary war, if you were caught drinking hot tea you were "in trouble" because that meant that you supported the British Empire. Americans still had to have their tea, though, so they started making iced tea (though the first recipe found, that had been written down, was from much later). I had only eaten in a restaurant twice when in the UK, so I never noticed.
I've always wondered if that was true, though the book was actually quite old. And I don't know which part of the UK you're from so sorry if my question has little relevance. :P
And now I want chips.