Charles overruled Camilla to go public on ill health.

Queen Camilla was against King Charles's decision to publicly disclose his ongoing health concerns earlier this year, according to biographer Rob Jobson, who has written a number of books about Charles and other members of the royal family.

- EMMA GUINNESS

The King first announced that he was undergoing treatment for a benign prostate condition in January. In February, it was announced that the 75-year-old had been diagnosed with an undisclosed form of cancer, which had been discovered during the procedure. A statement from Buckingham Palace said: “No further details are being shared at this stage, except to confirm that His Majesty does not have prostate cancer.”

The King was forced to take a temporary step back from public facing duties and it was reported that he would be undertaking a reduced schedule when he returned to work at the end of April.