1. Department of Geography, Environment and Earth Sciences, Faculty of Science; University of Hull; Hull UK
2. Department of Geography; Durham University; Durham UK
3. Now at Lancing College; Lancing UK
4. Department of Geology; University of Illinois; Urbana IL USA
5. Departments of Geography and Geographic Information Science, Mechanical Science and Engineering and Ven Te Chow Hydrosystems Laboratory; University of Illinois; Urbana IL USA
6. Division of Geography and Geology, School of Environment and Technology; University of Brighton; Brighton UK
7. School of Earth and Environment; University of Leeds; Leeds UK