Meghan Markle and Prince Harry, the Duke and Duchess of Sussex, are suing the Associated Papers, parent company of the Daily Mail, for breach of the U.K.’s Data Protection Act of 2018 after the Mail published a private letter Markle sent to her father.

The act, the U.K.’s complement to GDPR, requires protections for personal data, requiring that, among other things, it be “used fairly, lawfully and transparently; used for specified, explicit purposes; used in a way that is adequate, relevant and limited to only what is necessary; accurate and, where necessary, kept up to date.”

The young royals accused the media outlet not only of publishing the private missive to Markle’s father without permission but also of editing it “in an intentionally destructive manner.”

Prince Harry, whose mother Princess Diana was relentless hounded by the press until her death in 1997 as paparazzi chased her car through a Paris tunnel, blasted the British tabloid press for similar pursuit of his wife.

“I’ve seen what happens when someone I love is commoditized to the point that they are no longer treated or seen as a real person,” he said in a statement. “I lost my mother and now I watch my wife falling victim to the same powerful forces.”

The duo is also suing the media company for copyright infringement.