This briefing paper analyses the results of the 2015 General Election. It includes the election results by country, region and party, as well as the full result and turnout for every UK constituency. This is the second edition of the briefing paper, which provides additional analysis and statistics. New chapters in this edition cover seats changing hands, the characteristics of voters for each party, the characteristics of candidates and MPs, the electorate and turnout, safe and marginal seats, by-elections during the last Parliament, polling day, and the marginality of constituencies. The full results are available for download in two CSV files. The election results shown in this Briefing Paper were provided by Returning Officers following the 2015 General Election.