Following the death of Queen Elizabeth II on 8 September 2022, King Charles III immediately acceded to the throne. This transition marked a significant moment in contemporary British history, representing the first change of monarch in seven decades. As the longest-serving heir apparent in British history, his succession brought an end to the record-breaking seventy-year reign of his mother and initiated a new era for the monarchy.

The constitutional process of accession was formalised shortly thereafter, confirming his role as sovereign. The transition was defined by both the solemnity of national mourning and the continuity of the Crown, as the King assumed his responsibilities as head of state. This shift in leadership concluded a period of unprecedented stability for the institution, setting the stage for the King to define his own approach to the monarchy in the twenty-first century.

Key aspects of the accession included:

• The immediate transfer of sovereign authority upon the passing of the Queen.
• The conclusion of the longest period as heir apparent in the history of the British monarchy.
• The formal recognition of the new monarch by the Accession Council.
• The commencement of a new reign following seven decades of stability.