The others named were: BNZ managing director Paul Thodey, infrastructure investor Morrison and Company executive chairman Lloyd Morrison, contracting group Fulton Hogan chief executive Lindsay Crossan, multinational roading contractors Serco Group managing director David Campbell, maintenance and construction company Alstom NZ managing director Geoff Hunt, Works Infrastructure chief executive Brent Waldron, international engineering consultancy Meritec managing director Ian Parton, Institute of Professional Engineers chief executive Andrew Cleland and Pacific Road director Greg Kay.
Mr Kay drafted the October 4 paper which led to Dr Armstrong's resignation on Monday.
The Herald understands at least three other unnamed business representatives were present.
From his recollection of the meeting Mr Harris said there was "at no stage ... any suggestion of 'inside running' for the latest group in terms of appointment to any official body, or preferred access to information or contacts".
But National has rubbished the suggestion that there was no other official record of the meeting.
"What Dr Cullen is asking us to believe is that for a meeting that lasted two and a quarter hours and had three parts, no briefing notes were prepared and nor were any notes taken," acting leader Roger Sowry said.
The papers released yesterday include notes Dr Armstrong provided for a meeting with Helen Clark, Michael Cullen and the Prime Minister's chief of staff, Heather Simpson, on September 17 which kicked off the Government's involvement with Dr Armstrong's plan.
It shows that Dr Armstrong wanted to discuss "a key point that arose in our meeting and subsequent telephone discussions with Paul Keating that 'New Zealand can learn from the Australian public and private partnership mistakes'."
He outlined plans for three discussion papers on private funding for infrastructure projects, issues that would need legislative changes, and mooted a meeting with ministers, Mr Keating and chief executives.
One of the paper's bullet points reads: "Think about an Infrastructure Council/Authority involving private and public-sector participation - further down the track."
Likely membership of a national infrastructure council was one of the baits offered to businesses to join Mr Armstrong's group in the October 4 paper which led to his resignation.
The Government has denied it has any plans for such a council.
Meanwhile, Act and New Zealand First, with support from National, have renewed their call for a select committee inquiry into the Armstrong affair.
Both Labour and United Future have refused to back an inquiry, effectively preventing both the powerful finance and expenditure committee and the commerce committee from taking any action.
But Act MP Deborah Coddington has called on the transport committee, where the Opposition has a majority, to set up an inquiry.
"All the Opposition needs ... is support from the Greens, and an inquiry can be held," she said.
However, Green co-leader Jeanette Fitzsimons said she would not agree to an inquiry until she saw its terms of reference.
"We've got quite a few 'please explain' questions going to the Government at the moment and what we might eventually do about an inquiry is going to depend at least partly on what sort of answers we get to those."
The Greens are angry that they were kept in the dark about private business involvement in the development of private-public partnership policy.
"We are much more concerned about the policy implications of all this and where the Government is actually going with PPPs. We are not necessarily opposed in every case but we are opposed to 'build, own, operate and transfer' schemes."
The letter that offended the Government:
Pacific Road NZ: Infrastructure Partnership Between the Government and the Private Sector