Evidence crucial to any inquiry into actions by Judith Collins and other National ministers and staff must be protected from being destroyed, Labour leader David Cunliffe says.

'The State Services Commission must order Ministerial Services to stop any computer files being deleted.

'All documents in the Justice Minister's office need to be immediately secured.

'Judith Collins' closest advisors have lost their jobs and should surrender their cell phones and lap tops.

'A full Commission of Inquiry must be held into the connection between National ministers and the Whale Oil Blogger Cameron Slater.

'We must clean up politics in New Zealand.

'As your Prime Minister I won't stand for dirty politics.

'We will clean up the system based on any recommendations that come out of the Commission of Inquiry.

"The 17,000 Kiwis who lost their savings in the collapse of Hanover Finance will be shocked at the alleged connection to Mark Hotchin.

"John Key's Government is rotten to the core and must be changed.

"New Zealanders have the power to stand up for what is right.

"The Government I lead will act ethically and uphold the values New Zealanders rightfully expect from their Government.

'New Zealanders know we need a positive change and we need to change the Government.

'It's time for a better New Zealand. That's what New Zealanders deserve,” David Cunliffe says.