35 WOMEN UNDER 35 2016: Mena Hatchman, 34 

Cambridge grad Hatchman is Diageo’s ecommerce director for Europe, leading a team of 30. She’s worked in Africa, Asia and Europe for the firm, spending over two-and-a-half years managing over £100m in sales, and was instrumental in bringing Guinness back into growth in Britain. She’s also the youngest pension board trustee director for the firm’s £6bn fund.