This chapter examines the law of succession in the British monarchy, where succession is immediate and automatic, with no interregnum, based on hereditary descent and regulated by parliamentary statutes and unique legal principles. Upon the death of the monarch, a sequence of ceremonial and legal steps, collectively termed the accession, formally transfers the Crown to the new Sovereign. Key elements of accession include the accession proclamation, the Sovereign’s declaration, and statutory oaths, culminating in the coronation. These elements serve both legal and public functions, reinforcing continuity, proclaiming the new reign, and reasserting constitutional principles. In 2022, these pre-coronation steps were publicly broadcast for the first time, underscoring transparency and inclusivity in the process. The chapter highlights how these accession rituals, rooted in ancient practices, provide both a solemn affirmation of the new monarch’s status and a reaffirmation of the constitutional framework supporting British kingship.