KEY POINTS:
National has opened up its biggest lead over Labour, the latest poll showing it 23 points ahead with 55 per cent support.
The Fairfax Media-Nielsen poll of 1088 voters showed National gaining 10 points on the same poll last November, while Labour lost 8 points.
Labour's problems don't stop there; support for Prime Minister Helen Clark has dropped to 29 per cent, down 9 points in three months, while National leader John Key is 15 points ahead on 44 per cent, up 8 points.
The Greens 6 per cent support meant it was the only minor party to hit the 5 per cent needed under MMP to qualify for seats without an electorate.
New Zealand First had 3 per cent, the Maori Party 2 per cent and ACT 1 per cent. UnitedFuture and the Progressives both failed to rate.
If the poll was reflected in an election-night result, National would govern alone with 69 seats.
The poll, taken between February 13 and 19, had a margin of error of 3 per cent
- NZPA