Connie Nam felt her confidence draining away. The founder of London-based lifestyle jewellery brand Astrid & Miyu had built a fast-growing, multi-million-pound company, but that didn’t matter. As unbelievable as it sounds, imposter syndrome was creeping in. The Seoul-born, US-raised Londoner explains why: “I’d hired someone who’d started to challenge how I ran the business. They were an expert in that field; I wasn’t. I saw myself as a founder, not a CEO, so the criticism hit home.”