This post reveals the BES 2015 vote intention figures for the face-to-face survey and discusses them in the context of representativeness achieved via random probability sampling and efforts to interview hard-to-reach respondents. …
Unlike almost every other pre- and post-election survey (including our own internet panel), the reported vote in the BES face-to-face survey reflects the 2015 lead of the Conservatives over Labour and the full result more accurately, as the table below shows: CONT.
British Election Study