A Queensland man who claims to be the secret son of King Charles III and Camilla has shared the latest twist in his royal paternity case in the wake of the Queen’s death.

Simon Dorante-Day has attracted headlines around the world with his claims, which he says are the result of decades of research (see box at bottom of the page).

Watch above: Simon Dorante-Day reacts to the Queen’s death

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The 56-year-old says he’s been inundated with requests from media and royal watchers around the world in the days following the Queen’s passing on September 8, with many keen to know his next steps in the controversial case.

Speaking exclusively to 7NEWS.com.au, Dorante-Day said he’s more committed than ever to take Charles to court for DNA testing.

And in a bombshell new development, he says he has even discussed the legalities of bringing action against the King of the Commonwealth with senior legal figures.

“There has been a discussion in there between a judge and myself and his barrister about the legal standing of Charles, and whether the monarch is protected by the law or is above the law,” he said.

“And the answer to that was no – they told me that we don’t see any reason why he is.

“And secondly, Camilla and her family are certainly not above the law. So that argument’s already been had and…