William Mezzullo is Head of Hydrogen at Centrica Energy and responsible for driving and overseeing the Group’s hydrogen aspirations. Centrica is active across the whole hydrogen value chain including production, distribution, storage and end-use; and is a strong promotor and thought-leader in a hydrogen whole-system approach. William is Vice President of Hydrogen UK and Chair’s the Renewable Energy Association’s Biogas and Hydrogen Forums. Prior to joining Centrica, he was a Fund Lead at JLEN, a FTSE 250 renewable energy fund. William has worked in the renewable energy industry since 2010, developing and building commercial-scale green gas anaerobic digestion plants, where he was Head of Projects at Future Biogas, one of the largest anaerobic digestion companies in the UK.  He holds a PhD from the University of Bath in bioenergy.