A new poll on the Auckland super city mayoralty election has Len Brown of Manukau with a small lead over John Banks of Auckland City.
The Herald DigiPoll is based on 750 responses between 8 - 14 September and has a margin of error of 3.6%.
The survey has Mr Brown with 29.8% support and Mr Banks with 27.8%.
The number of undecided voters is 35.2%.
Delivery of voting papers for the election start on Friday. Voting closes on 9 November.
The new Auckland Council comes into being on 1 November. It is a merger of eight existing councils.