Titulus Regius ("royal title" in Latin) is a statute of the Parliament of England, issued in 1484, by which the title of King of England was given to Richard III. It is an official declaration that describes why the Parliament had found, the year before, that the marriage of Edward IV of England to Elizabeth Woodville had been invalid, and consequently their children, including Edward, Richard and Elizabeth, were illegitimate and, therefore, debarred from the throne. Thus Richard III was proclaimed the rightful king... After Richard was overthrown, the act was repealed by the first parliament of the new king, Henry VII. Henry also ordered his subjects to destroy all copies of it (and all related documents) without reading them. So well were his orders carried out that only one copy of the law has ever been found. This copy was transcribed by a monastic chronicler into the Croyland Chronicle, where it was discovered by Sir George Buck more than a century later during the reign of James I. [*]The usurper and murderer, Henry Tudor, had to legitimize his own rule; destruction of the Titulus Regius in effect relegitimized the sister, whom he then married, but the brothers would therefore be the lawful heirs, so he had them murdered, pinning the murders on the murdered king, Richard.
The irony of that is that Henry Tudor was a Catholic and Henry VIII was vocal proponent of papal authority until the pope refused to grant the annulment.
I’m sure Henry 7 had a good and valid reason for deleting those e-mails from his server.