Odd that Saunders doesn't mention the two terrorist attacks, the one in Manchester less than three weeks ago and the one in London last week, and what  effect they may have had on the election.  The Tories' drop in the polls, and Labour's rise, starts after the Manchester massacre: https://en.wikipedia.org/wiki/Opinion_polling_for_the_United_Kingdom_general_election,_2017#2017. Of course that may just be coincidence, but maybe not.