Key Points:

National Party leader John Key will today view surveillance footage from his party's recent conference where MPs were secretly recorded.

But Prime Minister Helen Clark says the hunt for who was behind the recordings is a smokescreen to divert attention from what was said.

National is trying to find out who infiltrated its annual conference and talked to MPs about sensitive policies at a cocktail party 13 days ago.

It has obtained surveillance camera tapes which recorded people going into and coming out of the event in Wellington's Michael Fowler Centre.

Deputy leader Bill English was recorded saying National would "eventually" sell Kiwibank and MP Lockwood Smith said the party was adopting policies it did not like so it would not scare voters before the election.

A National spokesman said MP Nick Smith, who was also recorded but said nothing controversial, had looked at the camera tapes.

So had staff from the leader's office and Mr Key would have an opportunity today.

The footage was "not that great".

A blog rumour that National had offered a reward for the culprit was untrue, the spokesman said.

Helen Clark repeated yesterday morning that she had no idea who was behind the recordings.

The Government has accused National of having a secret agenda, and National in turn has said it suspects that a member of Labour's youth wing posed as a member of the Young Nationals at the conference.

"I can assure you, hand on heart, that I know nothing of this whatsoever," the Prime Minister told Newstalk ZB.

"I think the National Party istrying to divert this on to who didit."

Helen Clark said the MPs had been talking about their "real agenda" and National was going to try to con the electorate.