Constitution of the United Kingdom from the state, which was confirmed by the Church of Scotland Act 1921. England and Wales share the same legal system, while Scotland and Northern Ireland each have their own distinct systems. These distinctions arose prior to and were retained after the unions according to the terms of the 1706 Treaty of Union, ratified by the 1707 Acts of Union, and the Acts of Union 1800. Reforms since 1997 have decentralised the UK by setting up a devolved Scottish Parliament and assemblies in Wales and Northern Ireland. The UK was formed as a unitary state, though Scotland and England retained
Unionism in Scotland continued until 1746 and the Jacobite defeat at Culloden. With the Acts of Union 1800, Ireland united with Great Britain into what then formed the United Kingdom of Great Britain and Ireland. The history of the Unions is reflected in various stages of the Union Flag, which forms the flag of the United Kingdom. The larger part of Ireland left the United Kingdom in 1922 however Northern Ireland chose to remain within what is now called the United Kingdom of Great Britain and Northern Ireland. The 300th anniversary of the union of Scotland and England was marked in 2007. The