David Ashford is founder and managing director of Bristol Spaceplanes Limited, an innovative small company pioneering low-cost access to space. He graduated from Imperial College in aeronautical engineering and spent one year at Princeton doing post-graduate research on rocket motors. His first job, starting in 1961, was with the Hawker Siddeley Aviation spaceplane design team. He has since worked as an aerodynamicist, project engineer, and project manager on various aerospace projects, including the DC-8, DC-10, Concorde, the Skylark sounding rocket, and various naval missile and electronic warfare systems at Douglas Aircraft and at what is now BAE Systems. He co-authored with Prof. Patrick Collins the first serious book on space tourism Your Spaceflight Manual – How You Could be a Tourist in Space Within Twenty Years (Headline, 1990), and wrote a follow-up book Spaceflight Revolution (Imperial College Press, 2002). His most recent book, Space Exploration: All That Matters, was published by Hodder in 2013. He has published about twenty papers on space transportation in the professional press. He is a Fellow of the Royal Aeronautical Society and is a Rolt Fellow at the Centre for the History of Technology at the University of Bath.