In June 2016, more than 17 million people voted for Britain to leave the European Union. The fallout of this momentous referendum has been tumultuous and unpredictable. Now, from the authors of the highly-acclaimed Brexit: Why Britain Voted to Leave the European Union (Cambridge University Press, 2017), comes the definitive guide to the transformation of British politics in the years following the Brexit vote. By charting the impact of Brexit on three major elections - the 2017 and 2019 general elections as well as the 2019 European Parliament elections - this book reveals the deeper currents reshaping modern Britain. The authors draw upon many years of unique and unprecedented data from their own surveys, giving key insights into how and why Brexit has changed British electoral politics. The book is written in a clear and accessible style, appealing to students, scholars and anyone interested in the impact of Brexit on Britain today.