I suppose it was inevitable . . .

It's hard to be an American writing fanfic for a British show. You start out thinking that we speak the same language over here that they do over there. Slowly you learn differently. You find out about a few different terms -- "lift" instead of "elevator," that kind of thing. Maybe you knew a lot of differences already from having spent time in the UK. Maybe you even once had a very surreal experience at the London Zoo where you tried to order a popsicle and the guy selling them had no idea what the hell you were talking about. ("Ice lolly," who knew?) But you still think, "How many differences can there be, really?"

( more here )