Her outburst against the monarch was condemned at the time by Australia’s prime minister, Anthony Albanese, and there were calls for Ms Thorpe to resign which she staunchly refused.

Peter Dutton, the leader of the opposition Liberal Party, said that if Ms Thorpe was so vehemently opposed to Australia’s constitutional system, she should step down and stop taking her generous parliamentary salary.

The independent senator is a seasoned protester known for her attention-grabbing political stunts.

The 51-year-old politician, who is descended from Gunnai, Djab Wurrung and Gunditjmara indigenous clans, comes from a prominent family of Aboriginal activists.

Her father, who is white, has accused her of being “racist towards white people”. Roy Illingworth said that he was “a bit disappointed in the way she has been carrying on lately”.

He added: “After all, she has got an English background, as well as Irish. She didn’t use to be like this. Maybe the power has gone to her head.”