I am usually absolutely oblivious to any clues and any hints as to who is the murderer. Really, I never know beforehand. Exception: this one. After about half way (and this indicates that every other reader knows after the first chapter) I figured who the killer was and had to wonder what was wrong with the inspector that he couldn’t see it. What was going on was obvious.
Nevertheless, this was a very enjoyable read (and for once I was ahead of the police) with great surroundings, typical English countryside atmosphere and a story that kept you interested.