1. Faculty of Engineering and the Environment, University of Southampton, University Road, Highfield, Southampton SO17 1BJ, UK
2. Department of Civil, Construction, and Environmental Engineering, Iowa State University, Town Engineering Building, 394 Town Engineering, Ames, IA 50011, USA
3. Department of Architecture and Civil Engineering, University of Bath, Bath BA2 7AY, UK
4. Geotechnical Observations Ltd, 9 Avro Way, Brooklands, Weybridge KT13 0YF, UK
5. High Speed Two (HS2) Ltd, Two Snowhill, Snow Hill Queensway, Birmingham B4 6GA, UK