Good for National, not good for Labour but probably not bad enough to prompt a leadership move.

National Party to 47% (up 0.5% since June 17-30, 2013)
Maori Party 2% (up 0.5%)
ACT NZ 0.5% (up 0.5%)
United Future 0% (down 0.5%).

Labour is 31% (down 0.5%)
Greens are 11.5% (down 1.5%)
New Zealand First 4.5% (up 1%)
Mana Party 1.5% (up 1%)

Conservative Party of NZ 1.5% (down 0.5%)
Others 0.5% (down 0.5%)

Electors were asked: “If a New Zealand Election were held today which party would receive your party vote?”

This latest New Zealand Roy Morgan Poll on voting intention was conducted by telephone – both landline and mobile telephone, with a NZ wide cross-section of 956 electors from July 1-14, 2013. Of all electors surveyed 4% (down 2%) didn’t name a party.

http://www.roymorgan.com/findings/new-zealand-morgan-poll-july-18-2013-201307180442