1. Heather Purshouse is a research assistant at the School of Civil Engineering, University of Leeds, UK.
2. Nicholas Roxburgh () is a PhD candidate at the School of Earth and Environment, University of Leeds, UK.
3. Matthias Javorszky is a graduate of Cranfield University, Cranfield, UK.
4. Dr Andrew Sleigh is a senior lecturer at the School of Civil Engineering, University of Leeds, UK.
5. David Kimani is a committee member of the Mukuru Water & Sanitation Project, Nairobi, Kenya.
6. Professor Barbara Evans is the chair of Public Health Engineering at the School of Civil Engineering, University of Leeds, UK.