Melchoir wearing Slim Barrett jewelleryPhotography by Mark Kean, Styling by Kim O'NeilSlim Barrett is one of London’s silent couturiers. From primitive chainmail bras and body armour to ornate coronets and avant-garde brooches, wandering through his archive feels like dipping into a piece of medieval history, or a “pirate’s treasure trove,” as Barrett refers to it. His Clerkenwell studio tells a gothic tale of baroque tiaras, Bauhaus pendants, dripping chandeliers and extravagant swirling me...