The Treaty of Union and the subsequent Acts of Union state that England and Scotland were to be "United into One Kingdom by the Name of Great Britain",:Both Acts and the Treaty state in Article I: That the Two Kingdoms of Scotland and England, shall upon 1 May next ensuing the date hereof, and forever after, be United into One Kingdom by the Name of GREAT BRITAIN. and as such "Great Britain" was the official name of the state, as well as being used in titles such as "Parliament of Great Britain"..; The term Great Britain had been in use in some official contexts for a century, such as at the proclamation of Charles I's acession to the throne in 1625 as "King of Great Britain".Henry Paton, HMC Mar & Kellie, Supplement (London, 1930), p. 226.
The Treaty of Union and the subsequent Acts of Union state that England and Scotland were to be "United into One Kingdom by the Name of Great Britain",:Both Acts and the Treaty state in Article I: That the Two Kingdoms of Scotland and England, shall upon 1 May next ensuing the date hereof, and forever after, be United into One Kingdom by the Name of GREAT BRITAIN. and as such "Great Britain" was the official name of the state, as well as being used in titles such as "Parliament of Great Britain".; The term Great Britain had been in use in some official contexts for a century, such as at the proclamation of Charles I's acession to the throne in 1625 as "King of Great Britain".Henry Paton, HMC Mar & Kellie, Supplement (London, 1930), p. 226.