Today, HM Queen Elizabeth II died peacefully at Balmoral. Her eldest son immediately succeeded her becoming King Charles III. His son inherits his titles as heir to the throne and will now be Duke of Cornwall and Cambridge (among several other titles). King Charles will now relinquish the coat of arms he has borne since 1958 and the royal arms which had been used by his late mother since 1952, immediately becomes his coat of arms.
May she Rest in Peace. God Save the King!