Six films to watch this week

Joaquin Phoenix takes the title role in Ridley Scott’s ‘Napoleon’; ‘Tish’ is a documentary tribute to photographer Tish Murtha; a Merseyside lad spends a summer with aristos in Emerald Fennell’s ‘Saltburn’; Todd Haynes’s ‘May December’ stars Natalie Portman and Julianne Moore; Hunger Games prequel ‘The Ballad of Songbirds and Snakes’ retrofits the franchise; an Oscar-worthy turn from Sandra Hüller in ‘Anatomy of a Fall’ — all reviewed by Danny Leigh