Our first glimpse of actor and singer Taron Egerton as the English artiste Elton John is easily the image that best summarises the latter’s biopic, Rocketman. Egerton stomps through a backlit hallway in the very first scene, wearing an orange sequin-laden body suit with feathered crimson red wings and a pair of devil’s horns. Platform heels and a pair of rose-tinted, heart-shaped glasses complete the outfit. But the hallway, as one might expect, doesn’t lead to a stage. It leads to a morbid room with a handful of people sitting in a circle. This is rehab. This is where Elton