History of the formation of the United Kingdom Kingdom of England (which included Wales and controlled Ireland) and the Kingdom of Scotland. The once independent Principality of Wales fell under the control of English monarchs from the Statute of Rhuddlan in 1284. The Union of Crowns in 1603, the accidental consequence of a royal marriage one hundred years earlier, united the kingdoms in a personal union, though full political union in the form of the Kingdom of Great Britain required a Treaty of Union in 1706 and Acts of Union in 1707 (to ratify the Treaty). The Act of Union 1800 united the Kingdom of Great Britain with
Acts of Union 1707 justices of the peace in each shire to carry out administration. In effect it took the day-to-day government of Scotland out of the hands of politicians and into those of the College of Justice. In the year following the Union, the Treason Act 1708 abolished the Scottish law of and extended the corresponding English law across Great Britain. Scotland benefited, says historian G.N. Clark, gaining "freedom of trade with England and the colonies" as well as "a great expansion of markets". The agreement guaranteed the permanent status of the Presbyterian church in Scotland, and the separate system of laws and