1. Senior Lecturer, School of the Built Environment and Architecture, London South Bank Univ., 103 Borough Rd., London SE1 0AA, U.K. (corresponding author).
2. Professor, School of Engineering and the Built Environment, Birmingham City Univ., Millennium Point, Birmingham B4 7XG, U.K.
3. Senior Lecturer, School of Engineering and the Built Environment, Birmingham City Univ., Millennium Point, Birmingham B4 7XG, U.K.