Musical scoring (Malcolm Arnold, composer; Muir Mathieson, musical director) wonderfully enhances the most humorous scenes. When you see the movie, you’ll know what I mean. The black and white cinematography (Jack Hildyard) is beautifully done as are Lean’s camera shots, particularly those high above the characters.
For Fawlty Towers fans, look for Prunella Scales as one of the younger sisters. She famously played Sybil Fawlty, John Cleese's wife in the TV series back in the 1970s.
Once again, I will not reveal the plot (other than the clue regarding John Mills) so as to not spoil the movie for anyone. But it’s great little production and well worth your time.