If you were the owner of this castle, what kind of English would you speak? I bet a wonderfully refined variety of RP. Or perhaps you would have a slight Hungarian, German or Slavonic accent. Somehow I find this entertaining rather than prejudiced, but the author of this article has more to say about English accents and the dark side of their use in films and TV shows.
Compare this to David Crystal’s take on the changing perception of accents. So, what English do we teach?