The Labour Party has widened its lead over National to four points in the latest 1 News Colmar Brunton poll out tonight, registering an approval rating of 43 per cent to National's 39 per cent.

Labour's standing at 43 per cent remains the same as the last 1 News Colmar Brunton poll one week ago, but National has dropped two points to 39 per cent.

New Zealand First is up one point to 9 per cent, while the Green Party remains on 5 per cent, meaning they would just scrape into Parliament.

The Maori Party is up one point to 2 per cent, as is The Opportunities Party.

Labour leader Jacinda Ardern has nudged higher in the preferred Prime Minister stakes, up one point to 35 per cent.

Meanwhile, National leader Bill English has dropped two points to 31 per cent as preferred Prime Minister, and New Zealand First's Winston Peters has climbed one point to 5 per cent.



Ms Ardern says she's happy with the result but realises the polls could fluctuate between now and the election.

"Yeah, no certainly pleased to see that people still are putting their support behind us but I still continue to believe that this will be an incredibly tight race," she told 1 NEWS today.



Mr English said the latest poll did not reflect what he was seeing on the campaign trail.

"It doesn't feel like that on the ground. Look this is a drag race and people are starting to look at Labour's policies," Mr English said



The latest poll result comes after the second leaders debate on Monday, which saw Mr English commit to a target to reduce child poverty and Ms Ardern promise to retaliate against Australia if it continues to take away entitlements of Kiwis living across the ditch.



The latest 1 News Colmar Brunton poll was conducted between September 2-6 and included 1007 eligible voters.