Strong and stable? Theresa May's election poll lead succumbs to outlier syndrome

Contextualising Corbyn's improving numbers

I hate to say I told you so but, tell a lie, I told you so. As the election campaign heads into the home straight, could the unthinkable be on the cards? Could Theresa May, who started some four weeks ago with what was widely regarded as an unassailable lead, be on the verge of losing?"