Environmental Sciences graduate John Twitchen has spent the last 30 years in and around the waste and resources sector and is a Fellow of the Chartered Institution of Wastes Management. Recently he set up circular economy start-up Stuff4Life focused on polymer circularity, with the company picking up Recycled Product of the Year at the 2023 National Recycling Awards and a nomination for The Earthshot Prize 2024. John is also a founder of circularity start-up Xeroc working with colleagues from across the materials and resources sectors to develop 'concrete as a service'. In his spare time, John is a BMX coach and presenter on YouTube channel BMX Race Hub.