Keith Gildart is Professor of Labour and Social History at the University of Wolverhampton, UK. He has published widely on the British Labour movement. He is the author of North Wales Miners: A Fragile Unity, 1945-1996 (2001). His most recent book is Images of England through Popular Music: Class, Youth, and Rock ‘n’roll,1955-76 (2013). David Howell is Emeritus Professor of Politics at the University of York, UK. He has written extensively on the Labour Party and the trade union movement. He is the author of MacDonald's Party: Labour Identities and Crisis, 1922-1931 (2002). His most recent book is Mosley and British Politics 1918-32: Oswald’s Odyssey (2015).