Even if you are suffering from eat-the-rich fatigue (see The Menu, Triangle of Sadness, The Lesson, Parasite, Bait, The White Lotus, Succession etc.) and can no longer work up much of an appetite for wealthy folk being dreadful you must make an exception for the psychological thriller Saltburn. It’s by Emerald Fennell and it’s not so much the story that will blow you away as her audacity.