The Landlady (1979)

Arriving in Bath to take up his first job away from home young Billy Weaver decides to take a room with a charmingly maternal if eccentric landlady. Her dog and cat are both stuffed and the only other names in her guest-book seem vaguely familiar to him but he cannot think why. Sadly he will never find out as he drinks the tea which the landlady has poisoned to add him to her collection.