British news networks have called the United Kingdom referendum on membership in the European Union for leave in a narrow victory that took most of the night to shake out. The BBC estimates that leave will win by a margin of roughly 52 percent to 48 percent.

Polls had indicated the vote would be very close, but most last-minute surveys showed remain leading. Two internet pollsters conducted day-of surveys on Thursday that were released after the polls closed. YouGov and Ipsos-MORI both indicated that remain would win the day -- YouGov had the status quo up by 4 points, and Ipsos-MORI had it up by 6 points.

Those two polls werent included in the HuffPost Pollster average of public referendum polls, since they were conducted as voting was happening. The average of all surveys conducted prior to the polls opening on Thursday showed that remain was up by 0.5 percentage point over leave.

It would be easy to say that the polls failed based on these numbers. But the polling averages differed, depending on what type of poll you looked at. Throughout the campaign , the polls diverged, based on whether they were conducted online or by telephone.