[bojan]

> At the time "polls" predicted a Remain win.

This is a common trope but is simply not true. The polls were really tight[0].

[0] https://en.wikipedia.org/wiki/Opinion_polling_for_the_United...

[ceejayoz]

Your link largely agrees; the "Polls of polls" shows a general consensus on a tight Remain win, and the chart shows the convergence being very late in the game.