Union, Act of (Scotland), 1707. United England and Scotland and established the kingdom of Great Britain. In 1603 there was a union of crowns when James VI of Scotland became James I of England but, despite the king's wish the two countries remained independent states until 1707 (except for a brief legislative union during the Interregnum). After 1688 William III was anxious to promote union and in 1700 the House of Lords approved a bill authorizing the appointment of commissioners to negotiate, but the Commons did not agree. The process was restarted on the accession of Anne in 1702, but commissioners did not meet until April 1706, as there was much opposition or indifference in both countries. The English government was driven to seek a union when in 1705, to try to extract economic concessions, the Scottish Parliament passed an act allowing Scotland to choose a successor to the Scottish crown on Anne's death, putting the prospect of the Hanoverian succession in jeopardy. The articles of union negotiated by the commissioners formed the basis of the Acts passed by both the English and Scottish Parliaments.

The unitary state of Great Britain was established on 12 May 1707 with Anne as queen, and the succession guaranteed in the house of Hanover. The Scottish Parliament was abolished, and Scottish representation in the British parliament consisted of 45 MPs and 16 representative peers (the numbers based on the respective sizes of the two economies). Free trade between North Britain (Scotland) and South Britain (England) was established, and England's colonies were open to the Scots on an equal footing. The Scots retained their own legal system (though the House of Lords soon established its position as the highest court of appeal from the Scottish courts), as well as their own Privy Council (this, however, was abolished in 1708). The established churches were to remain the same: Anglican in England and presbyterian in Scotland.

The Union did not settle the problem of mistrust between the two nations, and though England secured immediately the succession and thus her northern frontier (one of her main objectives), Scotland's chief expectation of economic benefit was several decades in coming.

Clyve Jones