Anne ascended the thrones of England, Scotland and Ireland on 8 March 1702. On 1 May 1707, under the Act of Union

Acts of Union 1707

The Acts of Union were two Parliamentary Acts - the Union with Scotland Act passed in 1706 by the Parliament of England, and the Union with England Act passed in 1707 by the Parliament of Scotland - which put into effect the terms of the Treaty of Union that had been agreed on 22 July 1706,...

, two of her realms, England and Scotland, were united as a single sovereign state

Sovereign state

A sovereign state, or simply, state, is a state with a defined territory on which it exercises internal and external sovereignty, a permanent population, a government, and the capacity to enter into relations with other sovereign states. It is also normally understood to be a state which is neither...

, the Kingdom of Great Britain

Kingdom of Great Britain

The former Kingdom of Great Britain, sometimes described as the 'United Kingdom of Great Britain', That the Two Kingdoms of Scotland and England, shall upon the 1st May next ensuing the date hereof, and forever after, be United into One Kingdom by the Name of GREAT BRITAIN. was a sovereign...

.

Anne's Catholic father, James II and VII

James II of England

James II & VII was King of England and King of Ireland as James II and King of Scotland as James VII, from 6 February 1685. He was the last Catholic monarch to reign over the Kingdoms of England, Scotland, and Ireland...

, was deposed during the "Glorious Revolution

Glorious Revolution

The Glorious Revolution, also called the Revolution of 1688, is the overthrow of King James II of England by a union of English Parliamentarians with the Dutch stadtholder William III of Orange-Nassau...

" of 1688. Her Protestant

Protestantism

Protestantism is one of the three major groupings within Christianity. It is a movement that began in Germany in the early 16th century as a reaction against medieval Roman Catholic doctrines and practices, especially in regards to salvation, justification, and ecclesiology.The doctrines of the...

 sister Mary

Mary II of England

Mary II was joint Sovereign of England, Scotland, and Ireland with her husband and first cousin, William III and II, from 1689 until her death. William and Mary, both Protestants, became king and queen regnant, respectively, following the Glorious Revolution, which resulted in the deposition of...

 and Mary's husband, Anne's brother-in-law and cousin William III

William III of England

William III & II was a sovereign Prince of Orange of the House of Orange-Nassau by birth. From 1672 he governed as Stadtholder William III of Orange over Holland, Zeeland, Utrecht, Guelders, and Overijssel of the Dutch Republic. From 1689 he reigned as William III over England and Ireland...

, became joint monarchs.