Philip Cowley is Professor of Parliamentary Government at the University of Nottingham. He is author (with Dennis Kavanagh) of The British General Election of 2010 (Palgrave), as well as editor (with Richard Heffernan and Colin Hay) of Developments in British Politics 9 (Palgrave). His other books include The Rebels (Politico’s) and Revolts and Rebellions (Politico’s), which won the Political Studies Association’s W.J.M. Mackenzie Book Prize. He established www.revolts.co.uk, which publishes analysis on the voting of MPs.