The Daily Telegraph gives a brief overview of the history of royal scandals as a background to the current instance of alleged blackmail against a royal.

The most prominent instance mentioned in the article is a prior case of blackmail against a member of the Royal Family:

In 1891, the Duke of Clarence, son of the future Edward VII, discussed the possibility of paying off two prostitutes he had met, in exchange for the return of two letters he had sent to them.

The rest of the article consists of descriptions of instances when royals were part of legal proceedings:

In 1870, his father the Prince of Wales - later King Edward VII - voluntarily appeared as a witness in a divorce case when Lady Mordaunt falsely accused the heir to the throne of being one of her lovers.

Again, in June 1891, he appeared as a witness in the Tranby Croft case to testify on a slander accusation arising from a card game.

King George V, Edward VII’s son, was accused of bigamy by a republican newspaper early in his reign and sued for libel.

Although he did not appear in court to give evidence, the King sent a statement making clear that he was innocent of bigamy and was legally married to Queen Mary.

Five years ago, the Princess Royal became the first member of the royal family to be convicted of a criminal offence when she admitted a charge under the Dangerous Dogs Act after one of her pets bit two children in Windsor Great Park.

The previous year, the Princess was fined £400 and given five penalty points after admitting driving her Bentley at 93mph on a dual carriageway in Gloucestershire.

The Daily Telegraph article, “History of royal scandals”