London-based Anthesis says it has filled a gap in the market between large multi-disciplinary consultancies and small boutiques. Set up in 2013, it helps its clients — which include Tesco, Target and The North Face — improve their corporate sustainability strategies, and consults on issues including climate change and supply chain management. Founder and chief executive Stuart McLachlan, 51, steered international sales to £8.7m in 2017, helped by offices across Europe, Asia, the US and the Middle East. It also merged with Spanish agency Lavola in February. After our research closed, it reported international sales had risen to £10.7m.