The Finance Minister-in-waiting is letting nothing slip on coalition negotiations.

National is in talks with ACT and New Zealand First, after special votes revealed all three are needed to form a Government.

A former New Zealand First MP, Andrew Williams, told Mike Hosking this morning leader Winston Peters would want to be Treasurer.

But Nicola Willis wouldn't be drawn on it.

"One of the things that's been really great about this process, and I think you've seen it from David Seymour, from Chris Luxon, from Winston Peters- is our respectful desire not to negotiate via the media."

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