Our cousins across the pond may have invented the English language, but over the past 240 years or so, Americans have made some... shall we say... "improvements." Often, people travel from the U.S. to England wrapped in a sense of comfort, thinking, "Well, they speak the same language, so I'll be able to get by just fine."
Or will you?
There are a few very significant differences. Want to wear a fanny pack? That's cool; they're making a comeback, after all. Just don't call it a "fanny" pack. The word means something very different over there. Interested in having a cigarette? Don't freak out when someone offers you a "fag." And get used to weird rhymes that have no overt meaning whatsoever. I'm here to help, so watch this video in full before you even think of booking your ticket to Britain.