The Treaty of Union is the name given to the agreement that led to the creation of the united Kingdom of Great Britain, the political union of England (including Wales) and Scotland, that took effect on 1st May, 1707. The Kingdom of Great Britain, also known as the United Kingdom of Great Britain, was a State in northwest Europe, in existence from 1707 to 1800 A political union is a type of state which is composed of or created out of smaller States Unlike a Personal union, the individual states share a common government England is a Country which is part of the United Kingdom. Its inhabitants account for more than 83% of the total UK population whilst its mainland Scotland ( Gaelic: Alba) is a Country in northwest Europethat occupies the northern third of the island of Great Britain. The details of the Treaty were agreed on 22 July 1706, leading to Acts of Union being passed by the separate parliaments of England and Scotland. The Acts of Union were a pair of Parliamentary Acts passed during 1706 and 1707 by the Parliament of England and the Parliament of Scotland to put into The Parliament of England was the Legislature of the Kingdom of England. This article is about the pre-1707 parliament The article on the devolved legislative body established in 1999 is at Scottish Parliament. [1]