Reform Acts in the context of "Reform Act 1832"

The constitution of the United Kingdom comprises the written and unwritten arrangements that establish the United Kingdom of Great Britain and Northern Ireland as a political body. Unlike in most countries, no official attempt has been made to codify such arrangements into a single document, thus it is known as an uncodified constitution. This enables the constitution to be easily changed as no provisions are formally entrenched.

The Supreme Court of the United Kingdom and its predecessor, the Appellate Committee of the House of Lords, have recognised and affirmed constitutional principles such as parliamentary sovereignty, the rule of law, democracy, and upholding international law. It also recognises that some Acts of Parliament have special constitutional status. These include the Magna Carta, which in 1215 required the King to call a "common counsel" (now called Parliament) to represent the people, to hold courts in a fixed place, to guarantee fair trials, to guarantee free movement of people, to free the church from the state, and to guarantee rights of "common" people to use the land. After the Glorious Revolution, the Bill of Rights 1689 and the Claim of Right Act 1689 cemented Parliament's position as the supreme law-making body, and said that the "election of members of Parliament ought to be free". The Treaty of Union in 1706 and the Acts of Union 1707 united the Kingdoms of England, Wales and Scotland, the Acts of Union 1800 joined Ireland, but the Irish Free State separated after the Anglo-Irish Treaty in 1922, leaving Northern Ireland within the UK. After struggles for universal suffrage, the UK guaranteed every adult citizen over 21 years the equal right to vote in the Representation of the People (Equal Franchise) Act 1928. After World War II, the UK became a founding member of the Council of Europe to uphold human rights, and the United Nations to guarantee international peace and security. The UK was a member of the European Union, joining its predecessor in 1973, but left in 2020. The UK is also a founding member of the International Labour Organization and the World Trade Organization to participate in regulating the global economy.

The Peterloo Massacre took place at St Peter's Field, Manchester, England, on Monday 16 August 1819. Eighteen people were killed and 400–700 were injured when the cavalry of the Yeomen charged into a crowd of around 60,000 people who had gathered to demand the reform of parliamentary representation.

After the end of the Napoleonic Wars in 1815, there was an acute economic slump, accompanied by chronic unemployment and harvest failure due to the Year Without a Summer, and worsened by the Corn Laws, which kept the price of bread high. At that time, only around 11 percent of adult males had the right to vote, very few of them in the industrial north of England, which was worst hit. Radicals identified parliamentary reform as the solution, and a mass campaign to petition parliament for manhood suffrage gained three-quarters of a million signatures in 1817 but was flatly rejected by the House of Commons. When a second slump occurred in early 1819, Radicals sought to mobilise huge crowds to force the government to back down. The movement was particularly strong in the north-west, where the Manchester Patriotic Union organised a mass rally in August 1819, addressed by well-known Radical orator Henry Hunt.