Auckland's mayor Phil Goff believes the city's port will have to be moved, but he's critical of how the current process is unfolding.
Cabinet's development committee will this week consider the latest report from the Upper North Island Supply Chain Strategy working group, with a decision expected to be made by Cabinet before Christmas.
The report, which hasn't been made public, but has been sighted by Nine to Noon, recommends moving "much or all" of the Port of Auckland's freight business to Northport, near Whangarei.
The Ports of Auckland is 100 per cent owned by Auckland Council, which the leaked report says would be $6 billion better off if the port moved.
Phil Goff tells Kathryn Ryan he doesn't believe the case has been made