
Unlike most countries, the UK does not have a single, official document that serves as its constitution. Instead, it has an uncodified constitution, which means that its laws are derived from various sources, including Acts of Parliament, court cases, and unwritten conventions. This gives the constitution flexibility, as no provisions are formally entrenched, and it can be changed without the need for a formal amendment process. While some argue for a codified constitution, others believe that the current system works well and that the difficulties of agreeing on a codified text should not be underestimated. The UK's constitution includes important principles such as parliamentary sovereignty, the rule of law, democracy, and respect for human rights.
| Characteristics | Values |
|---|---|
| Nature | The UK constitution is uncodified and unwritten, meaning there is no single constitutional document. |
| Composition | The constitution is spread across various sources, including Acts of Parliament, court decisions, constitutional conventions, codes of conduct, and practices. |
| Flexibility | The lack of a codified constitution makes it easier to change as no provisions are formally entrenched. |
| Parliamentary Sovereignty | Parliamentary sovereignty is a fundamental principle of the UK constitution, with the UK parliament holding the ultimate law-making power. |
| Rule of Law | The UK constitution upholds the rule of law, with the Supreme Court playing a key role in interpreting and upholding constitutional principles. |
| Democracy | The UK constitution guarantees the right to vote in fair elections and upholds individual rights and freedoms. |
| International Law | The UK constitution recognizes international law, including its participation in organizations such as the UN, WTO, and the European Convention on Human Rights. |
| Guardians | The constitution has multiple guardians, including the Supreme Court, parliamentary committees, the Lord Chancellor, and constitutional watchdogs. |
| Conventions | Conventions are understandings about how the constitution functions, such as the role of the Prime Minister and the monarch's reliance on ministerial advice. |
| Common Law | The UK has a common law system, where judges interpret and apply laws based on custom and precedent. |
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What You'll Learn

The UK constitution is uncodified and unwritten
The United Kingdom is one of only a few countries that does not have a codified constitution. Instead of a single document outlining the country's laws, the UK's constitution is made up of various Acts of Parliament, court cases, and unwritten conventions and traditions. This collection of sources is often referred to as an "uncodified constitution".
The UK's constitution is spread across multiple places, including specific Acts of Parliament, understandings of how the system should operate (known as constitutional conventions), and various decisions made by judges. This dispersal can make it challenging to identify and understand. While some argue that the UK should adopt a codified constitution, others believe that the current system works well and that the difficulties of agreeing on a codified constitution should not be underestimated.
The uncodified nature of the UK constitution has several implications. Firstly, it means that the constitution can be easily changed as no provisions are formally entrenched. Secondly, it allows for flexibility and quick implementation of major constitutional changes, such as the outlawing of slavery. Additionally, the absence of a codified constitution places parliament as the ultimate guardian of the constitution, with MPs and peers responsible for upholding key constitutional principles.
The UK's uncodified constitution includes several important features and principles. These include parliamentary sovereignty, the rule of law, democracy, upholding international law, and individual rights. Conventions, or understandings of how the constitution functions, are also significant. While conventions are not legally binding, they play a crucial role in the UK system of government, such as the convention that the Prime Minister should be a member of the House of Commons.
In summary, the UK's uncodified and unwritten constitution is a collection of written and unwritten sources that establish the country's political system. While it may lack the formality and entrenchment of a codified constitution, it provides flexibility and adaptability, with parliament acting as its ultimate guardian.
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It is made up of various Acts of Parliament, court cases, and conventions
The United Kingdom is one of a handful of countries that does not have a codified constitution. Instead, the UK constitution is made up of various Acts of Parliament, court cases, and conventions.
Firstly, the UK constitution is comprised of various Acts of Parliament. These include the Parliament Acts (1911–1949), which regulate the powers of the two Houses of Parliament; the Representation of the People Acts (1918), which provide for universal voting and other matters of political representation; and the Human Rights Act (1998), which establishes a bill of rights and freedoms for individuals to take action on through the courts. Some Acts of Parliament, such as the Magna Carta, are considered to have special constitutional status.
Secondly, court cases play a role in shaping the UK constitution. Judges create common law when they decide legal proceedings, and their interpretations of the rules can effectively create law. For example, in 2012, Occupy London protestors attempted to use the Magna Carta to resist their eviction from St. Paul's Churchyard, but the Master of the Rolls did not consider it directly relevant to the case.
Thirdly, conventions are understandings about how the constitution functions. While conventions can be hard to define precisely and lack legal force, they are the source of some of the most important features of the UK system of government. For example, the convention that the Prime Minister should be a member of the House of Commons able to command the confidence of that institution.
The UK's uncodified constitution has several implications. Firstly, it means that the constitution is easily changed since no provisions are formally entrenched. Secondly, the dispersal of the constitution across various sources can make it difficult to identify and understand. Thirdly, in the absence of a codified constitution, Parliament is the ultimate guardian of the constitution, and all members of Parliament have a responsibility to uphold key constitutional principles.
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Parliamentary sovereignty is a defining principle
The United Kingdom is one of a handful of countries that does not have a codified constitution. Instead, it has an uncodified constitution, which means that there is no single document that serves as the source of its laws. Rather, the UK constitution is made up of various laws, precedents, and traditions that are often ambiguous or conflicting. This includes specific Acts of Parliament, particular understandings of how the system should operate (known as constitutional conventions), and various decisions made by judges.
One of the key principles of the UK's unwritten constitution is parliamentary sovereignty. This means that the UK parliament has the ultimate law-making power to create or abolish any law. Parliamentary sovereignty is regarded as the defining principle of the British Constitution. However, it is important to note that parliament can limit its law-making power, as in the Human Rights Act, or devolve legislative power, as in the Scotland Act.
The concept of parliamentary sovereignty is based on the idea that the UK parliament is the ultimate guardian of the constitution in the absence of a codified constitution. This means that members of parliament (MPs and peers) have a responsibility to uphold key constitutional principles. While some argue that the UK should adopt a codified constitution, others believe that the current system works well and that the difficulties of agreeing on a codified constitution should not be underestimated.
The UK's unwritten constitution has evolved over time through various Acts of Parliament and court decisions. For example, the Parliament Acts (1911-1949) regulate the powers of the two Houses of Parliament, and the Human Rights Act (1998) establishes a bill of rights and freedoms actionable by individuals through the courts. The creation of the Supreme Court also changed the principle that no Parliamentary law could be changed by the courts.
In summary, parliamentary sovereignty is a defining principle of the UK's uncodified constitution, granting the UK parliament the power to create and abolish laws. However, this power is not absolute and can be limited by acts such as the Human Rights Act and the devolution of legislative power. The UK's unwritten constitution is a collection of various laws, precedents, and traditions that have evolved over time and are interpreted by experts and the courts.
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There are multiple guardians of the constitution
The UK's constitution is spread across several places, including specific Acts of Parliament, understandings of how the system should operate (constitutional conventions), and various decisions made by judges. This dispersal can make it challenging to identify and understand.
The UK constitution has multiple guardians, including:
The Supreme Court
The Supreme Court, through its constitutional judgments, acts as a guardian of the constitution. For example, in the Miller/Cherry case in 2019, the Supreme Court played a pivotal role in interpreting and upholding constitutional principles.
The House of Lords Constitution Committee and the Commons Public Administration and Constitutional Affairs Committee
These parliamentary committees play a crucial role in scrutinising constitutional matters and ensuring that the principles of the constitution are upheld.
The Lord Chancellor
The Lord Chancellor, a senior government official, is also responsible for safeguarding the constitution. They work to ensure that the constitution is interpreted and applied consistently.
Constitutional Watchdogs
Independent bodies, such as the Judicial Appointments Commission and the Electoral Commission, act as watchdogs to safeguard the constitution. They ensure that the processes related to the judiciary and elections are fair and adhere to constitutional principles.
Parliament
In the absence of a codified constitution, parliament serves as the ultimate guardian of the UK constitution. Members of Parliament (MPs) and peers bear a significant responsibility to uphold key constitutional principles and ensure that any changes to the constitution are carefully considered and reflect the country's needs.
While the UK's uncodified constitution may present challenges in terms of clarity and understanding, the multiple guardians of the constitution work together to interpret, uphold, and, when necessary, evolve the principles that underpin the UK's political system.
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The UK constitution is bound to international law
The UK's constitution is unique in that it is not a single document but a set of sources, including Acts of Parliament, case law, and various conventions. This makes it challenging to identify and understand. One key aspect of the UK's constitution is its recognition of international law.
The UK's constitution is bound to international law through its participation in various international organisations and agreements. For example, the UK is a member of the United Nations, the International Labour Organization, the World Trade Organization, and the European Convention on Human Rights. The UK has also enacted legislation such as the Human Rights Act 1998 and the International Criminal Court Act 2001 to align with international law.
The UK's membership in these organisations and its implementation of relevant legislation demonstrate its commitment to upholding international law and cooperating with the international community. This commitment is further reflected in the work of the UK's leading constitutional institutions, including Parliament, the judiciary, the executive, and regional and local governments.
The UK's constitution also recognises the importance of individual rights and limitations on public authorities' power. This is evident in the Human Rights Act 1998, which established a bill of rights and freedoms for individuals to enforce in UK courts. The UK's constitution, therefore, reflects a balance between parliamentary sovereignty and the rule of law, with international law playing a significant role in shaping the country's constitutional principles.
While the UK's uncodified constitution allows for flexibility and easy amendments, it has also faced criticism for lacking a single, entrenched source of constitutional law. However, the UK's approach to its constitution, including its recognition of international law, contributes to the country's unique political and legal landscape.
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Frequently asked questions
The UK has an uncodified constitution, which means that there is no single constitutional document called 'The UK Constitution'. Instead, there is a combination of various constitutional laws and practices, including specific Acts of Parliament, court decisions, and constitutional conventions.
Examples of conventions include that the monarch acts on ministerial advice, that the Prime Minister sits in the House of Commons, and that the Queen appoints as Prime Minister the person most likely to command the confidence of the House of Commons.
There are a few reasons why the UK doesn't have a codified constitution. One reason is historical; the UK has enjoyed stability since the 18th century, and democracy was established through an evolutionary process rather than revolution. Another reason is political; there is a consensus between the two main UK-wide political parties that the 'unwritten' constitution serves the country's needs well. Additionally, parliamentary sovereignty, a fundamental part of the British constitution, would be breached by a codified constitution that is uneditable or difficult to edit.
One benefit of an uncodified constitution is that it allows for greater flexibility and ease of change since no provisions are formally entrenched. For example, major constitutional changes, such as the outlawing of slavery, can be handled relatively quickly by Parliament.

























