Channel 7 will air its nightly Gold Coast 7News television bulletin for the last time this Thursday, with Australia's largest media union calling the decision a "betrayal to its audience".

Sydney trains services will come to a halt from Thursday to Sunday this week due to industrial action by the Rail, Tram and Bus Union.

The company says it will use some of the funds to fix the Whyalla steelwork's blast furnace which has been offline since August.

More than 21,000 people have signed a petition to abolish the permits, and now two MPs from different parts of the political spectrum are trying to get them banned too.

Nicole Manison's Territory Labor government recently signed a major gas contract with US-owned company Tamboran Resources, and she spruiked the firm when she was mining minister.