Greens reject access to trade union report

The Greens have knocked back a federal government offer to provide them and Labor with limited access to a controversial volume of the royal commission into trade union corruption.

"We won't be having a bar of the government's attempt to create two classes of members of parliament," Greens workplace relations spokesman Adam Bandt told reporters in Canberra.

The government already had agreed to provide four crossbench senators with an unedited version of the secret volume in a bid to convince them to support the re-establishment of a building and construction watchdog.