1: Introduction 2: Volatility and Electoral Shocks 3: Turbulent British Politics: An Explanation 4: The Rise of the Volatile Voter 5: EU Accession Immigration and the Rise of UKIP 6: The Global Financial Crisis 7: Reward, Blame, and Guilt by Association? The electoral collapse of the Liberal Democrats 8: Scotland: A tale of two referendums 9: Brexit and the re-shaping of British electoral politics 10: Conclusions

An open access title available under the terms of a CC BY-NC-ND 4.0 licence An official book from the 2015 and 2017 British Election Study team Offers long term perspective through detailed survey analysis using sophisticated methods Examines five electoral shocks that affected the elections of 2015 and 2017 Provides an overarching explanation for the volatility in British elections

Edward Fieldhouse is Professor of Social and Political Science at the University of Manchester. He is principal investigator of the Scientific Leadership Team of the 2015 and 2017 British Election Studies. He is co-author of over seventy journal articles, chapters, and books on a range of topics including voting behaviour, turnout, and electoral geography. Jane Green is Professor of Political Science and British Politics at the University of Oxford and Professorial Fellow at Nuffield College, Oxford. She is the Director of the Gwilym Gibbon Centre for Public Policy at Nuffield College and Co-Director of the British Election Study. She is also an election analyst for ITV News. Jane Green is the author (with Will Jennings) of The Politics of Competence: Parties, Public Opinion and Voters, Cambridge University Press, and of many articles and chapters examining the over-time contextual basis of voting and party competition, and the basis of policy-based evaluations of political parties. She is a regular commentator on national media, winner of the Political Studies Association 'Research Communicator of the Year' (2015) and was part of the independent inquiry into the 2015 opinion polls. Geoffrey Evans is co-director of the British Election Study and Principal Investigator of the 2016 EU Referendum Study. Over the last 30 years he has undertaken numerous surveys and election studies in Britain, Northern Ireland, and Eastern Europe. His research examines the relationships between social divisions, political values and perceptions, and voting behaviour. In addition to over 150 journal articles and chapters he has authored or edited six books, including The New Politics of Class: The Political Exclusion of the British Working Class (with James Tilley), and Brexit and British Politics (with Anand Menon), both published in 2017. Jonathan Mellon is a research Fellow at Nuffield College, University of Oxford, working on the British Election Study. Jonathan works on the BBC's election night forecasts and as a consulting data scientist with the World Bank, OSCE, and Carter Center. He was awarded his DPhil in Political Sociology from the University of Oxford. His research interests include electoral behaviour in Britain and across the world and developing better measurements in social science both for traditional surveys and big data. Christopher Prosser is a Presidential Fellow at the University of Manchester and a non-stipendiary Research Fellow at Nuffield College, Oxford, working on the British Election Study. He also works as a psephologist for ITV. He has published numerous articles on political behaviour and party competition in Britain and Europe, polling, and survey research methods. Hermann Schmitt is co-director of the British Election Study and outgoing co-ordinator of the European Election Study. He has previously undertaken numerous social and electoral studies in Europe. His research examines the inter-relationship in political orientations and behaviours in European multi-level electoral democracies. In addition to over 100 journal articles and book chapters, he has authored or edited ten books and Special Issues of scholarly journals, as well as more than a dozen data base editions. Cees van der Eijk is Professor of Social Science Research Methods at the University of Nottingham; earlier he was Professor of Political Science at the University of Amsterdam. He was one of the co-directors of the British Election Study, and has (co) directed numerous surveys on elections in the Netherlands, the UK, and the European Union. He has (co)authored many books, scholarly articles, and book chapters on political science, comparative politics, elections, and political methodology.

An open access title available under the terms of a CC BY-NC-ND 4.0 licence An official book from the 2015 and 2017 British Election Study team Offers long term perspective through detailed survey analysis using sophisticated methods Examines five electoral shocks that affected the elections of 2015 and 2017 Provides an overarching explanation for the volatility in British elections