Winston peters talks to families of Pike River Mine disaster
The Pike River mine disaster claimed 29 lives. Photo: AFP.

New Zealand First leader Winston Peters has vowed to make the re-entry into the Pike River mine a bottom line in coalition talks which began this morning.

Mark Sainsbury took a call from Sonya Rockhouse - mother of Pike River victim Ben Rockhouse - who had just finished a meeting with Mr Peters.

He reportedly told Mrs Rockhouse that regardless of what party he chose in forming a government, re-entry into the mines would be non-negotiable.

Mrs Rockhouse was “ecstatic” to hear the New Zealand first leader reaffirm his promise to re-enter the mine.

“We have been made so many promises over the past 7 years... and been let down so many times but Winston has been consistent all the way through.”