1. Reader, Queen's University Belfast, Belfast, UK (corresponding author: )
2. Senior Geotechnical Engineer, Queen's University Belfast, Belfast, UK
3. Professor of Subsurface Engineering, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, the Netherlands
4. Professor, School of Engineering, Cardiff University, Cardiff, UK
5. Professor, Civil and Environmental Engineering, University of Rhode Island, Kingston, RI, USA
6. Consultant, Murray Rix Limited, Stoke Golding, UK
7. Lecturer, Queen's University Belfast, Belfast, UK
8. Associate Professor, University College of Dublin, Dublin, Ireland