A Day That Shook The World: Royal Family in crisis

(AFP/Getty)

On 15 June 1992, a scandalous book about life inside the Royal Family was released - firing the starter pistol on a series of unprecedented criticism of the institution of the monarchy.

Author Andrew Morton's explosive book "Diana: Her True Story" concerned the Prince and Princess of Wales, and claimed that the rift between them had caused Diana to attempt suicide.

Meanwhile Prince Andrew's marriage to Sarah Ferguson was also on the rocks, prompting another raft of tabloid speculation, and questions on whether the monarchy would even survive.

Watch original British Pathe footage from the troubled royal summer in 1992, above.