Get Mark's insider knowledge when you sign up to our royal newsletter Plus gorgeous imagery, polls and trivia – delivered to your inbox Sign up to the Palace Confidential newsletter HERESee more Daily Mail on Google - save us as a Preferred SourceBy DAILY MAIL REPORTER Published: 15:30 BST, 2 June 2026 | Updated: 15:33 BST, 2 June 2026

Police are studying a Mail on Sunday dossier detailing how Andrew Mountbatten-Windsor was allegedly sharing confidential government information with wealthy business contacts while working as a trade envoy.The groundbreaking 147-page document was first sent to the Palace in 2019, including to the then Prince Charles, but no investigation was launched into his brother's activity at that time.In this week's Palace Confidential newsletter, a reader asks the Mail on Sunday's Assistant Editor on Investigations, Mark Hookham, why the King did not act on the information when it was received or do something as soon as he acceded to the throne.To get Mark's expert take, sign up to the newsletter today get it in your inbox absolutely FREE on Thursday evening.Want more of the Daily Mail's unrivalled royals journalism, straight from some of the world's leading experts on the monarchy?In the Palace Confidential newsletter, we bring together the most knowledgeable voices, gorgeous photography and exclusive commentary to expose the truth behind polished public appearances, and reveal the very human drama at the heart of this extraordinary institution.Get unrivalled insider gossip and expert analysis on the King and Queen, William and Catherine, Harry and Meghan and more in your inbox every Thursday.You'll have the chance to ask our Royal Editor, Rebecca English, and other top journalists everything you've always wanted to know.Sign up to the Palace Confidential newsletter HERE.