Johnathan Shepherd is Visiting Professor in Modern British History at the University of Huddersfield. Jonathan Davis is Principal Lecturer in Russian and Modern History and Co-Director of the Labour History Research Unit at Anglia Ruskin University, Cambridge. He is author of Stalin: From Grey Blur to Great Terror (2008) and co-editor of Britain's Second Labour Government, 1929-1931: A Reappraisal (2011).