When I visited Liverpool years ago I needed some cash. As in Belgium we call a bank machine "Mr. Cash". I thought it must be the same in the UK and asked a man where was the next "Mr. Cash" He looked at me with big eyes and said "I am not a Mr. Cash", I was surprised that he didn't understand and described what I wanted ! He started to laugh and said :" Aww, you mean a "hole in the wall" ! Now it was me who was surprised and found that expression wonderful ! I told my friends we should rename our Mr. Cash as " trou dans le mur" !