Daniel Dorling is Professor of Human Geography at the University of Sheffield. His recent books include Injustice: Why social inequality persists and So you think you know about Britain?. He is a member of the World Health Organization's Scientific Resource Group on Health Equity Analysis and Research. Bethan Thomas is a Research Fellow in the Department of Geography at the University of Sheffield. She has researched extensively on inequalities in Britain. Her publications include Identity in Britain and The Grim Reaper's Road Map.