Anne became Queen of England, Queen of Scotland, and Queen of Ireland in 1702. She became Queen of Great Britain when the new kingdom started in 1707. (Ireland was a separate kingdom, so Anne was Queen of Ireland and the later kings of Great Britain were each themselves King of Ireland.) From the start of 1801, during the reign of George III, the two kingdoms of Ireland and Great Britain became the United Kingdom of Great Britain and Ireland.
↑Murdoch, Alexander (2007). "England, Scotland, and the Acts of Union (1707)". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/96282. ISBN978-0-19-861412-8. Retrieved 2021-06-19. On 1 May 1707 England and Scotland (since 1603 a union of crowns) became the 'United Kingdom of Great Britain'. The new united kingdom was to be represented by a 'union' flag and governed by a British parliament at Westminster and a shared head of state (with the contentious issue of monarchical succession now settled in favour of the protestant house of Hanover).(Subscription or UK public library membership required.)
↑"Act of Union 1707". UK Parliament. Retrieved 2021-05-01. The Acts of Union, passed by the English and Scottish Parliaments in 1707, led to the creation of the United Kingdom of Great Britain on 1 May of that year. The UK Parliament met for the first time in October 1707.