Prince Harry's memoir Spare has officially gone on sale, with much of its contents having leaked days before.

The book reveals details about Harry's relationship with his father, King Charles, his elder brother, Prince William, and other members of the British royal family that have never previously been published.

As is usual for the royal family, spokespeople for Charles and William have declined to comment, though insiders have revealed the palace has been busy behind the scenes.

From physical altercations, to drug use and more - we look at some of 14 key revelations outlined in the book.

Click 'read more' for 14 bombshell revelations.