A small selection of the Hymag archive Credit: Matt Benson Scent creates the most acute kind of nostalgia and it is heavy in this former cannon factory in the south east London, close to the river. Inside I find Hymag, the world’s biggest collection of magazines according to the Guinness World Records, with over 150,000 magazines. Hymag is open to visitors for a fee: to students, academics, magazine fanatics and brands, who use it, among other things, to research their own histories. (A representative of the House of Dior, for instance, is a regular visitor.) Hymag is in the process of di...