When questioned by Newshub, National leader Bill English stuck with his current metaphor of choice - a drag race - saying despite the poll, he believed Labour and National were "level pegging".

"Those numbers are a bit higher than what we're seeing.... What we see is a drag race between the two big parties," he said.

"They are going to be choosing National because we can build on the strength that we have, not slow it all down."

Labour leader Jacinda Ardern said both the Greens and Labour have ruled out an electoral deal to get the Greens over the line.

When asked whether she would rather miss out on power than send a signal for Labour voters to back a Green electoral candidate, Ms Ardern said there has been "real volatility" in the polls and she believed the Greens were polling at a different number.

"Both of us have [ruled out an electoral deal]. We are running our own campaigns locally, and we're campaigning individually for party vote," Ms Ardern told Newshub.

The poll has a margin of error of 3.1 percent and was conducted from September 6 to September 11.

Newshub.