Richard Folkson is Royal Academy of Engineering Visiting Professor for Innovation and Design and Deputy President of the Institution of Mechanical Engineers. Professor Steve Sapsford BSc (Hons), CEng FIMechE is a former director at Ricardo and is currently the chair of the Powertrain Systems and Fuels Group at the IMechE. He is an expert in the field of vehicle propulsions systems with special interest in life-cycle analysis and sustainable fuels. Steve is a Visiting Professor at the University of Cardiff and an Industrial Advisor at the University of Nottingham.