Ian Stewart is a Chartered Engineer working at Davies Maguire + Whitby, a structural engineering design practice in London. His key project experience includes BBC Broadcasting House and Tate Modern II in London and St David's 2 shopping centre in Cardiff. He is also involved with the industry-related charity CODEP, founded with the objective of delivering libraries and literary centres in Sierra Leone. He has a PhD in Structural Dynamics from the University of Strathclyde, Glasgow.

Edward Denison is an independent consultant, writer and architectural photographer. His work focuses on sustainability and the built environment, and ranges from consulting for international agencies on heritage and development to researching, writing and photographing books on design and architecture. He has a PhD in Architectural History from University College London.