Spangly bell-bottoms may look great on the catwalk, but what about down the pub? We take three challenging trends to the streets (so you don't have to) Fashion is a fickle mistress. One season, she wants you in grey flannel and brogues, the next, kimonos and a man bun. Sometimes her demands are easy to follow: "Buy a shearling jacket!" she'll say, or "Chuck out your knitted tie immediately."