National's Chris Luxon is adamant that Stuart Nash should depart Parliament.

Stuart Nash has been stripped of his Cabinet roles after revelations yesterday he'd leaked details of confidential meetings, again breaching the Cabinet Manual.

Nash has since taken to social media to apologise for his actions, but has confirmed he'll stay on as Napier's local MP to avoid setting off a by-election.

National Leader Chris Luxon says Stuart Nash's actions are 'inexcusable' and that he's lost confidence in the former Minister.

"This is serious stuff, you've had someone inside Cabinet leak the nature of a conversation and the information and what his colleagues' positions were to donors that actually benefitted from this conversation."

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