
The UK constitution is often described as 'unwritten', but this is not entirely accurate. While the UK constitution is not contained in a single document, it does exist in various written sources, including statutes, conventions, judicial decisions, and treaties. This makes the UK constitution different from most other countries, which have codified constitutions. The UK's uncodified constitution offers flexibility, allowing for a pragmatic approach to governance, but it can also be challenging to understand due to its dispersed nature.
| Characteristics | Values |
|---|---|
| Written or unwritten | The UK constitution is often described as "unwritten", but this is not entirely accurate. While it is not codified in a single document, many of its parts are written in different sources. |
| Flexibility | The UK's uncodified constitution is flexible and can be amended or repealed by a simple majority vote in Parliament. This has allowed for pragmatic changes such as the removal of hereditary peers from the House of Lords and the introduction of the Human Rights Act. |
| Sources | The UK constitution is found in various sources, including Acts of Parliament, constitutional conventions, judicial decisions, treaties, and common law. |
| Parliamentary sovereignty | Parliamentary sovereignty is a key principle, with Parliament having the power to make or unmake any law without being limited by a constitutional text. However, the exact meaning of "parliamentary sovereignty" is still debated, and some argue that the rule of law enforced by the courts is the ultimate controlling factor. |
| International law | The UK constitution is bound to international law through its participation in organisations such as the United Nations, the European Convention on Human Rights, and the World Trade Organization. |
| Democratic principles | The UK constitution upholds democratic principles, including universal suffrage and the rights to free and fair elections. |
| Guardians | The UK constitution has multiple guardians, including the Supreme Court, the House of Lords Constitution Committee, specific constitutional watchdogs, and, in the absence of a codified constitution, Parliament itself. |
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What You'll Learn
- The UK constitution is largely written, but in different documents
- The UK constitution is uncodified, unlike most other countries
- The UK constitution is flexible and can be altered relatively easily
- Parliamentary sovereignty is commonly regarded as the defining principle
- The constitution is spread over a number of documents and sources

The UK constitution is largely written, but in different documents
The UK constitution is often described as "'unwritten', but this is not entirely accurate. While it is true that the UK constitution is uncodified—it has never been brought together in a single document—large parts of it are indeed written. These written parts are spread across various documents and sources, including specific Acts of Parliament, constitutional conventions, judicial decisions, and treaties.
The UK's constitution is found in leading statutes such as the Bill of Rights 1689, Acts of Union 1707 and 1800, the Act of Settlement 1701, Parliament Acts 1911 and 1949, the Human Rights Act 1998, and the Scotland Act, Northern Ireland Act, and Government of Wales Act 1998. Constitutional conventions, such as the monarch acting on ministerial advice and the Prime Minister sitting in the House of Commons, are also part of the UK's constitution and are codified in documents like the Cabinet Manual.
The UK's uncodified constitution has its advantages and disadvantages. On the one hand, it offers flexibility, allowing for pragmatic approaches where different options can be tried, tested, and developed over time. It has enabled changes such as the removal of hereditary peers from the House of Lords, the introduction of the Human Rights Act, devolution to Scotland, Wales, and Northern Ireland, and the creation of the Supreme Court. On the other hand, the lack of a single codified document makes the UK constitution harder to understand and interpret.
Some have argued for the creation of a codified UK constitution, but this is not a simple task. The UK's history and political evolution differ from those of countries that have codified constitutions, which often arise from major historical turning points like independence, revolution, or the collapse of a previous government. The UK, in contrast, has experienced stability without such dramatic ruptures, and its constitution has evolved gradually over time.
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The UK constitution is uncodified, unlike most other countries
The UK's uncodified constitution has been praised for its flexibility, allowing for a pragmatic approach where different policies can be trialled and adapted over time. This flexibility has enabled the UK to implement changes such as the removal of hereditary peers from the House of Lords, the introduction of the Human Rights Act, devolution to Scotland, Wales, and Northern Ireland, and the creation of the Supreme Court.
However, some critics argue that the uncodified nature of the UK constitution makes it harder to understand and more susceptible to abuse by those in power. They claim that the lack of a single, clear document outlining the rules of the political system makes it difficult for citizens to fully comprehend and identify when the government may be overstepping its boundaries. Additionally, the absence of elaborate amendment procedures means that a simple majority in Parliament can amend or repeal constitutional statutes, potentially leading to rules being altered for a government's advantage.
The UK's history also plays a role in its uncodified constitution. Unlike countries such as France, Italy, and the United States, the UK did not experience a significant revolution or political rupture during the late eighteenth or nineteenth century when written constitutions gained popularity. The UK's system also lacks a clear concept of a 'higher law', making it challenging to distinguish between constitutional law and regular law.
While the UK stands apart from most countries with its uncodified constitution, it shares this feature with a few nations like New Zealand and Israel.
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The UK constitution is flexible and can be altered relatively easily
The UK constitution is unique in that it is unwritten and uncodified, meaning it is not contained in a single document. Instead, it is found in various sources, including Acts of Parliament, judicial decisions, and conventions. This gives the constitution a high degree of flexibility, allowing it to be altered and adapted relatively easily.
The UK Parliament is often described as 'sovereign', meaning it can make or unmake any law without being limited by a constitutional text. This parliamentary sovereignty gives the government of the day significant power to amend the constitution as they see fit. For example, the Constitutional Reform Act 2005 altered the structure of the House of Lords, separating its judicial and legislative functions. The UK's constitution can also be amended through Acts of Parliament, such as the Parliamentary Voting System and Constituencies Act 2011, which changed the way the UK is divided into parliamentary constituencies.
The unwritten nature of the UK constitution has been praised for its flexibility, allowing for a pragmatic approach to lawmaking. This flexibility enables the constitution to adapt to changing times, societal changes, and new trends, perceptions, and beliefs. For instance, the removal of hereditary peers from the House of Lords and the introduction of the Human Rights Act 1998 would have been more challenging with a written constitution.
However, the flexibility of the UK constitution is a double-edged sword. While it allows for easy amendments, it can also lead to laws being altered or decisions made by parliament without due process. The lack of a codified document outlining the separation of powers can make it difficult for citizens to fully understand the constitution. Additionally, the very parliamentary supremacy that enables flexibility could be exploited, turning the constitution into a political tool.
In conclusion, the UK constitution's unwritten and uncodified nature gives it a high degree of flexibility, allowing it to be altered and adapted relatively easily. This flexibility has both advantages and disadvantages, and ongoing debates continue regarding the potential benefits of a codified UK constitution.
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Parliamentary sovereignty is commonly regarded as the defining principle
The UK constitution is often described as "unwritten", but this is not entirely accurate. While the UK constitution is not contained in a single legal source, it does exist in various written documents, including specific Acts of Parliament, constitutional conventions, and judicial decisions. This lack of a codified constitution makes the UK an outlier, although it shares this feature with New Zealand and Israel.
The UK's uncodified constitution has its advantages and disadvantages. On the one hand, it offers flexibility and adaptability, allowing for pragmatic approaches where different options can be tried, tested, and refined over time. For example, the UK constitution has enabled the removal of hereditary peers from the House of Lords, the introduction of the Human Rights Act, devolution to Scotland, Wales, and Northern Ireland, and the creation of the Supreme Court. On the other hand, the uncodified nature of the UK constitution makes it harder to understand and can lead to challenges in interpreting and amending it.
Parliamentary sovereignty is a key concept in the UK constitution and is often regarded as its defining principle. This means that Parliament has the ultimate law-making power to create or abolish any law without being limited by a constitutional text. However, the exact meaning of "Parliamentary sovereignty" is still debated, and Lord Hope has argued that it is not absolute, with the "rule of law enforced by the courts" being the ultimate controlling factor.
The UK constitution has multiple guardians, including the Supreme Court, the House of Lords Constitution Committee, the Commons Public Administration and Constitutional Affairs Committee, the Lord Chancellor, and specific constitutional watchdogs like the Judicial Appointments Commission and the Electoral Commission. In the absence of a codified constitution, Parliament acts as the ultimate guardian.
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The constitution is spread over a number of documents and sources
The UK Constitution is spread across several documents and sources, including legislation, royal prerogative, case law, and constitutional conventions. While it is often described as ["unwritten,"] this is not entirely accurate. The UK Constitution is written but not codified in a single document, making it distinct from most other countries.
The UK Constitution can be found in various sources, including specific Acts of Parliament, constitutional conventions, and judicial decisions. Examples of constitutional statutes include the Bill of Rights 1689, the Acts of Union 1707 and 1800, the Act of Settlement 1701, the Parliament Acts 1911 and 1949, and the Human Rights Act 1998. These statutes are considered leading sources of the UK Constitution.
Constitutional conventions, which are understandings of how the system should operate, are also an essential part of the UK Constitution. These conventions include the monarch acting on ministerial advice and the Prime Minister sitting in the House of Commons. While not legally binding, these conventions are documented in sources such as the Cabinet Manual and the Ministerial Code.
Additionally, judicial decisions play a crucial role in shaping the UK Constitution. Through their interpretations and rulings, judges have established important features such as individual rights and limitations on public authorities' powers. These decisions contribute to the body of case law that informs the Constitution.
The UK Constitution's uncodified nature has its advantages and disadvantages. On the one hand, it allows for flexibility and adaptability, as evident in the removal of hereditary peers from the House of Lords and the introduction of the Human Rights Act. However, the lack of a single codified document can make it challenging to decipher and understand the Constitution in its entirety.
While the UK Constitution may not be as easily accessible as those of countries with codified constitutions, its distributed nature across multiple documents and sources allows for a pragmatic approach. This distribution of power enables different options to be tried, tested, and refined over time, leading to an optimal arrangement that suits the country's unique historical context and political landscape.
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Frequently asked questions
The UK constitution is not contained in a single legal source. It is made up of various documents, statutes, conventions, and case laws.
The UK's uncodified constitution offers flexibility and allows for a pragmatic approach. It can be modified frequently to suit changing circumstances.
Examples of constitutional statutes include the Bill of Rights 1689, Acts of Union 1707 and 1800, the Act of Settlement 1701, Parliament Acts 1911 and 1949, and the Human Rights Act 1998.
Examples of conventions include the monarch acting on ministerial advice, the Prime Minister sitting in the House of Commons, and the Queen appointing as Prime Minister the person most likely to command the confidence of the House of Commons.
The UK constitution has multiple guardians, including the Supreme Court, the House of Lords Constitution Committee, the Commons Public Administration and Constitutional Affairs Committee, the Lord Chancellor, and specific constitutional watchdogs such as the Judicial Appointments Commission.

























