Poll of Polls - Labour and National are only two seats apart in the latest poll of polls average with Newshub Reid Research's latest poll, released last night, added in.

Graphic: RNZ

Labour and the Greens combined are now comfortably ahead of National.

The Newshub poll was taken a little before the 1 News Colmar Brunton poll published last Thursday, so Labour's lower score than in the 1 News survey - 39.4% compared with 43% - shouldn't be read as Labour going backwards.

In fact, Labour's average has climbed nearly 1 percentage point from 39.0% in Friday's poll of polls - to 39.8%.

On this latest reading Labour would have 49 seats. The Greens' average appears to be bottoming out. It is now 6.2%, which would net eight seats, making the combined Labour and Greens tally 57.

Labour and Greens combined are now a healthy 4.4% ahead of National, which is on 41.6% and 51 seats.

On these figures New Zealand First remains the decider as to which major party leads the next government. But its average continues to fall, from 9.1% in Friday's poll of polls to 8.0% and 10 seats.

The small parties continue to languish: the Māori Party is down to 0.8% and one seat; ACT is on 0.6% and one seat; and the Opportunities Party is 2.1% and heading down.

This is an arithmetical average of the three most recent polls: the unpublished UMR Research (for the Labour Party), Newshub Reid Research and 1 News Colmar Brunton. The next full update will be on Friday 8 September