Labour's Trevor Mallard is picked to be the next Speaker of the House. He is expected to be formally elected next week, then he will review the list.

The members of the public who have access to Parliamentary buildings, mainly for lobbying purposes, is set to be reviewed.

Almost 100 people who don't work at Parliament as MPs, staff or media have swipe card access to Parliamentary buildings, allowing them to enter and exit at their discretion without going through security.

Of the 93 people on the most recent list, released by the Speaker of the House in July, most work for special interest groups, lobbying firms, unions, or big business.

SUPPLIED Former Green MP Sue Kedgley has been pushing for more transparency around lobbyists' access to MPs. Some well-funded interest groups undoubtedly have more access to those who make the laws, than the average Kiwi.

The new Speaker, tipped to be Labour's Trevor Mallard, will review the list after his appointment.

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The list includes well-known lobbyists like Mark Unsworth, from lobbying firm Saunders Unsworth, Miles Erwin from the Bankers' Association, Connor English from Federated Farmers, Tony O'Brien from Sky TV, and Duncan Small from Air New Zealand.

VISA, Fonterra, KiwiRail, MYOB, Business NZ, the Insurance Council, Westpac, Vodafone, Chorus, Vector and Tourism NZ are also on the list, which was put together while the National Party was in power.

The NZ Council of Trade Unions (CTU) also has two representatives on the approved list.

Others on the list included party members, former MPs' spouses, lawyers, a pastor who leads morning prayers, and two photographers.

KEVIN STENT/STUFF Lobbyist Mark Unsworth (centre) is one of the most successful lobbyists in the capital, and has had open access to Parliament years.

Mallard would not comment on the list, including who was on it and the system around disclosure, until he was elected Speaker.

"The short story is that I can't anticipate being Speaker."

Mallard said the list would be updated by December 1.

SUPPLIED Former Business NZ chief executive Phil O'Reilly still has open access to Parliament. His access is still listed in relation to Business NZ, even though he resigned as chief executive in 2015.

The Speaker of the House started publicly releasing the list in 2012 when Lockwood Smith was Speaker.

In 2012, the list consisted of just 15 "approved visitors", including lobbyists from Saunders Unsworth, the Council of Trade Unions, Sky TV, Business NZ and Vector.

The Speaker has also set a new condition that those who get the cards must agree to have their names made public.

The Green Party had strongly objected to lobbyists having access cards and called for the list to be made public, saying it gave some lobbyists privileges to visit MPs under the cloak of secrecy.

While the list of people with access is made public each year, efforts to create a register of lobby groups, and of their interactions with members, have been unsuccessful.

During her time in Parliament, former Green Party MP Sue Kedgley pushed for a law change to establish a public register and disclosure regime for lobbyists.

Kedgley says knowing more about how lobbyists work, and who they meet, is essential to understanding what she describes as "privileged access" to politicians, and ensuring lobbyists with special interests don't have "undue influence" over politicians.

The Lobbying Disclosure Bill was passed to former Green MP Holly Walker after Kedgley left Parliament. It was drawn in 2012.

But the bill was rejected by a parliamentary committee out of concern it was too broad and would have discouraged constituents from engaging with politicians.

Kedgley said New Zealand lagged behind other countries, such as Australia and Canada, which required lobbyists to register themselves and file returns.