// These will be from the same polls that predicted Hilary would win and there would be no Brexit eh? //
Oh, for goodness' sake...
Polls come with an uncertainty attached, because that's the nature of random sampling. In both of the examples you cite, there was never a clear and convincing lead that could not be overturned. I think the most sophisticated analysis of the 2016 Presidential election suggested that Clinton had about a 3 in 4 chance of winning, to Trump's 1 in 4, but that's hardly overwhelming odds.
On the other hand, and admittedly quite surprisingly, Theresa May's personal popularity is currently somewhere in the 60% range, at least when compared to BoJo (31%, ie half as popular), or Moggy (25%); and she still enjoys a hefty lead over Corbyn. None of these leads is negligible, and it's safe to say -- no matter how shocking this may be -- that Theresa May is enjoying a post-deal bounce. Perhaps this is because a fair few people do indeed want, as Theresa May says, for Parliament to "get on with it" and deliver at least *some* form of Brexit, even if it's not the ideologically purest form of it.