In April, when U.K. Prime Minister Theresa May called for a “snap” general election for June 8, polls showed her Conservatives with an average lead of 17 percentage points over Labour. …
Recent surveys show Labour zooming up in the polls and Conservatives having declined somewhat (although some of Labour’s gains have also come at the expense of Liberal Democrats and other parties). …
So to borrow our phrasing from the U.S. election, when we said that Donald Trump was only a “normal-sized polling error” away from winning the Electoral College, May’s Conservatives are now only a normal-sized polling error away from a hung parliament. CONT.
Nate Silver, FiveThirtyEight