Reputation for frumpiness is over as M&S wins over younger audience with shows at Silverstone, Ibiza and now LFW This autumn’s London fashion week boasts plenty of familiar labels, from Burberry to Alexander McQueen, ready to show off their wares. But on Wednesday there was an unexpected addition: Marks & Spencer is joining the luxury lineup. The British high-street retailer will celebrate its 100th anniversary in the fashion industry by staging a catwalk show in September highlighting its latest women’s and menswear collections.