Andrew Mountbatten-Windsor allegedly received millions from Kazakh oligarch Timur Kulibayev, linked to a firm involved in corruption. The BBC investigation reveals concerns over the legitimacy of the funds used to purchase Sunninghill Park, raising questions about potential money laundering and the former prince's due diligence. Kulibayev's lawyers deny any wrongdoing, asserting the funds were legitimate. The transaction has drawn scrutiny due to its connections to corruption in Kazakhstan, with calls for further investigation.