The bikini is old-fashioned – no wonder it’s dying

The shortlist for outfit of summer 2016 runs something like this. Simone Biles in a leotard at the Rio Olympics, all stars and stripes and extra sparkle. Uma Thurman in a polo neck in the forthcoming Pirelli calendar. Taylor Swift on the beach with Tom Hiddleston, wearing lace-up brogues and a mustard-coloured sweater. Bella Hadid, naked but for two carefully positioned red roses, in the September issue of French Vogue.