In Octopussy, an Indian man is snake charming, and when he sees James Bond is there, he starts playing the James Bond theme on his instrument.
James Bond then says, "Charming tune" and gives him some money, and the Indian guy then acknowledges him (as Commander Bond) and says "Welcome to India."
Was this just put in the movie because it's the theme everybody knows, or is this known as his song or something special in MI6 (within the movies)? Would any MI6 agent recognise this particular theme?