| The kingdoms of England and Scotland were separate states from the 9th century but came into personal union in 1603 when James VI of Scotland succeeded his cousin Elizabeth I as James I of England. Though remaining separate states, this Union of the Crowns meant that the whole of the island of Great Britain was ruled by a single monarch with two titles (King of England and King of Scots), and two parliaments, except during the Interregnum and during the joint reign of William and Mary, who jointly reigned over both Kingdoms. This changed with the Acts of Union 1707, from when the monarch of Great Britain ruled by the power of a single unified Crown of Great Britain and of a single unified parliament. The succession to the throne of England, Ireland and Scotland was determined by the English Act of Settlement, rather than the Scottish equivalent, the Act of Security as this was part of the terms agreed in the 1706 Treaty of Union and put into effect with the two Acts of Union the following year. The adoption of the Act of Settlement required that the heir to the English throne be a Protestant descendant of Sophia of Hanover, effecting the future Hanoverian succession. Legislative power was vested in the Parliament of Great Britain, which replaced the Parliament of England and the Parliament of Scotland. As with the modern Parliament of the United Kingdom, the Parliament of Great Britain included three elements: the House of Commons, the House of Lords, and the Crown-in ... |