It's a tale that stretches the limits of credulity - a secret love child born to Prince Charles and Camilla Parker-Bowles as teenagers, but could there be any truth to the story of Simon Charles Dorante-Day?
The British-born engineer, 55, who now lives in Queensland, was conceived in 1965 and born the following April in Gosport, near Portsmouth. He claims that his adoptive grandmother told him the Duchess of Cornwall was his mother back in 1998.
Having since 'done his research', Simon is convinced he now has enough proof - along with his his 'Windsor-like cheek-bones and teeth' and 'Camilla-style hair' - that his claims are true. He has said a number of times that he would like a DNA test to prove his family link and wrote to the couple in 2012.