1. isardSAT UK, Guildford GU2 7YG, UK
2. IHCantabria—Instituto de Hidráulica Ambiental, Universidad de Cantabria, 39011 Santander, Spain
3. British Geological Survey, Nottingham NG12 5GG, UK
4. Department of Geography, National University of Ireland Maynooth, W23 X021 Maynooth, Ireland
5. Department of the Environment, Climate and Communications, Geological Survey Ireland, A94 N2R6 Dublin, Ireland
6. Marine and Coastal Unit, Geological Survey Ireland, A94 N2R6 Blackrock, Ireland