UMR research Executive Director Stephen Mills told Newstalk ZB's Chris Lynch that volatile polls this election campaign reflect an increase in swing voters.
Tonight's 1News-Colmar Brunton poll again flips the lead, with Labour in front on 44 per cent, with enough support to govern backed by the Green party.
It's a completely different story from the Newshub-Reid research, which showed National on 47 per cent, surging ten points ahead of its main competitor.
After hearing completely different stories from two results this week, a pollster says voters need to read between the polls.
Mills said private party polls also tell a story.
"If you average the Newshub and the Colmar Brunton you get about exactly where National's private polling is."
He said there's a lot more up in the air this election.
" I think that it seems to be what is happening internationally, that people are being unleashed to kind of change their mind, and change their mind often."
LISTEN TO THE INTERVIEW ABOVE
Take your Radio, Podcasts and Music with you