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
Acts of Union 1707 between the Church of England and the kirk. While it referred repeatedly to 'union' between England, Scotland, and Ireland, it did not explicitly commit to political union which had little support even among their English supporters. Even religious union was fiercely opposed by the Episcopalian majority in the Church of England and Independents like Oliver Cromwell. The Scots and English Presbyterians came to see the Independents who dominated the New Model Army as a bigger threat than the Royalists and when Charles I surrendered in 1646, they agreed to restore him to the English throne. Both Royalists and Covenanters agreed