The Five Main Sources of the UK Constitution | 英国宪法的五个主要来源

📚 The Five Main Sources of the UK Constitution | 英国宪法的五个主要来源

The United Kingdom does not have a single written constitutional document. Instead, its constitution is drawn from a variety of sources that have evolved over centuries, creating a complex and flexible system of governance. Understanding these five main sources — statute law, common law, conventions, authoritative works, and international treaties — is essential for any A‑Level student seeking to grasp how the British state is constituted and operates.

联合王国没有一部单一的成文宪法文件。其宪法源自数个世纪以来逐步形成的多种渊源，构成了一套复杂而灵活的治理体系。理解这五个主要来源——成文法、普通法、惯例、权威著作和国际条约——对于任何一个想要把握英国国家构成与运作方式的A‑Level学生来说都是至关重要的。

1. Statute Law | 成文法

Statute law refers to Acts of Parliament that have been passed by both the House of Commons and the House of Lords, and have received Royal Assent. These statutes are the most tangible and highest form of law in the UK constitution, as Parliament is legally sovereign. Statute law can override any other source of the constitution, and no court can strike down an Act of Parliament. Key constitutional statutes include the Magna Carta 1215, the Bill of Rights 1689, the Parliament Acts 1911 and 1949, the Human Rights Act 1998, and the Constitutional Reform Act 2005.

成文法指的是由下议院和上议院通过并获得御准的议会法令。这些法令是英国宪法中最具体、最高级别的法律形式，因为议会在法律上是主权机构。成文法可以推翻任何其他宪法渊源，且任何法院都不能废止一项议会法令。重要的宪法性成文法包括1215年《大宪章》、1689年《权利法案》、1911年和1949年《议会法》、1998年《人权法》以及2005年《宪制改革法》。

2. Evolution of Statute Law | 成文法的演变

The development of statute law mirrors the changing political landscape. Early statutes such as the Magna Carta limited the monarch's arbitrary power, while the Bill of Rights established parliamentary sovereignty after the Glorious Revolution. In the twentieth century, the Parliament Act 1911 curbed the Lords’ veto, asserting the democratic mandate of the Commons. More recent statutes, like the Scotland Act 1998, devolved powers to regional legislatures, demonstrating that statute law continues to reshape the territorial constitution. The European Union (Withdrawal) Act 2018 is a modern example of how statute law can dismantle a previous constitutional arrangement.

成文法的演变反映了政治格局的变迁。早期法令如《大宪章》限制了君主的专断权力，而《权利法案》则在光荣革命后确立了议会主权。进入二十世纪，1911年《议会法》限制了上议院的否决权，维护了下议院的民主授权。近年来的法令，如1998年《苏格兰法》，将权力下放给地区立法机构，表明成文法仍在重塑领土宪法。2018年《退出欧盟法》则是成文法如何废除既往宪法安排的现代例证。

3. Common Law | 普通法

Common law is the body of legal principles developed by judges through decisions in courts. It arises from judicial interpretation and precedent, and forms a vital part of the UK constitution, especially in defining the rights of individuals against the state. Over centuries, judges have declared fundamental rights—such as the right to a fair hearing and the right to freedom of expression—that existed long before they were codified in statute. Residual freedoms, those not removed by Parliament, are preserved by common law. Important cases like Entick v Carrington (1765) established the principle that the state must have legal authority for its actions.

普通法是由法官通过法院判决发展起来的一套法律原则体系。它源自司法解释和先例，是英国宪法的重要组成部分，尤其是在界定个人针对国家的权利方面。数个世纪以来，法官宣示了早在成文法典化之前就已存在的各项基本权利，例如获得公正聆讯的权利和言论自由权。未被议会移除的剩余自由由普通法加以保留。诸如1765年恩蒂克诉卡林顿案等重要案例确立了国家行为必须有法律依据的原则。

4. Landmark Common Law Cases | 里程碑式的普通法案例

Several landmark cases illustrate the constitutional role of common law. In Entick v Carrington, the court rejected the use of general warrants, affirming that government officials must point to specific legal power. In M v Home Office (1993), the House of Lords ruled that even a minister could be guilty of contempt of court, reinforcing the rule of law. In the modern era, the case of Jackson v Attorney General (2005) examined the limits of parliamentary supremacy, suggesting that judges might in extreme circumstances challenge an Act of Parliament. These decisions show that the common law constantly interacts with and tempers other constitutional sources.

若干里程碑式案例体现了普通法的宪法作用。在恩蒂克诉卡林顿案中，法院否定了普遍搜查令的使用，确认政府官员必须指明具体的法定权力。在1993年的M诉内政部案中，上议院裁定即使是内阁大臣也可因藐视法庭而被定罪，强化了法治原则。在当代，杰克逊诉总检察长案（2005年）审视了议会至上的界限，表明法官在极端情况下有可能挑战议会法令。这些判决表明，普通法不断与其他宪法渊源相互作用并对其进行约束。

5. Conventions | 惯例

Constitutional conventions are non‑legal rules that are nonetheless binding on political actors. They are not enforced by courts, but they are regarded as obligatory and essential for the smooth functioning of the constitution. Conventions fill gaps left by the law and regulate the exercise of legal powers. For example, the monarch, who legally possesses the power to refuse Royal Assent to a bill, invariably grants it by convention. The Salisbury Convention holds that the House of Lords should not oppose a government bill that gives effect to a manifesto commitment. Conventions thus ensure that the constitution works in a democratic and predictable manner.

宪法惯例是不具有法律强制力但对政治行为者具有约束力的非法律规则。它们不由法院强制执行，但被视为义务性的、对宪法的顺利运行不可或缺的规则。惯例填补了法律留下的空白，并规范法律权力的行使方式。例如，君主在法律上拥有拒绝御准一项法案的权力，但依照惯例总是予以批准。索尔兹伯里惯例规定，上议院不应反对履行竞选承诺的政府法案。因此，惯例确保宪法以民主和可预期的方式运行。

6. Key Constitutional Conventions | 关键的宪法惯例

Other essential conventions include individual ministerial responsibility, which dictates that ministers are accountable to Parliament for their own conduct and the work of their departments, and collective ministerial responsibility, which requires members of the government to publicly support cabinet decisions or resign. The conventions governing the appointment of the Prime Minister state that the monarch invites the leader of the party with a majority in the Commons to form a government. In a hung parliament, further conventions guide the formation of a stable administration. Though uncodified, breaching these conventions can lead to a constitutional crisis.

其他关键惯例包括个人大臣责任制，即大臣必须就其个人操守及部门工作向议会负责，以及集体大臣责任制，要求政府成员公开支持内阁决定，否则辞职。关于首相任命的惯例规定，君主应邀请下议院多数党领导人组成政府。在悬峙议会情况下，进一步的惯例指导稳定政府的组建。尽管不成文，违反这些惯例可能导致宪法危机。

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7. Authoritative Works | 权威著作

Authoritative works are academic writings that are accepted as detailed and reliable explanations of the constitution. Although they do not possess legal force, courts and politicians often refer to them to clarify ambiguous points of practice. The most famous is Walter Bagehot’s The English Constitution (1867), which distinguished between the ‘dignified’ and ‘efficient’ parts of the constitution. A.V. Dicey’s An Introduction to the Study of the Law of the Constitution (1885) articulated the twin pillars of parliamentary sovereignty and the rule of law. Erskine May’s Parliamentary Practice is used daily in the Houses of Parliament to resolve procedural questions.

权威著作是被公认为对宪法进行了详细、可靠解释的学术著作。尽管它们不具有法律效力，但法院和政治人物经常援引它们来澄清实践中模棱两可之处。最为著名的是沃尔特·白芝浩的《英国宪法》（1867年），该书区分了宪法的“尊严部分”与“效率部分”。戴雪的《宪法研究导论》（1885年）阐述了议会主权与法治这两大支柱。厄斯金·梅的《议会惯例》每天都在议会两院被用来解决程序问题。

8. Modern Use of Authoritative Works | 权威著作的现代运用

In contemporary constitutional debates, these works continue to carry weight. When the Supreme Court ruled on the prorogation of Parliament in Miller II (2019), it drew on Dicey’s conception of parliamentary sovereignty and the constitutional role of the courts. Parliamentary committees routinely cite Erskine May when investigating procedural irregularities. While new scholarly works have supplemented the traditional texts — such as those by Vernon Bogdanor — the older authorities remain embedded in constitutional reasoning. Their influence demonstrates that understanding the UK constitution involves not only reading statutes but also engaging with doctrinal commentary.

在当代的宪法辩论中，这些著作仍具有重要分量。当最高法院在2019年米勒第二案中就议会休会作出裁决时，引用了戴雪关于议会主权和法院宪法角色的概念。议会各委员会在调查程序违规时也经常引用厄斯金·梅。虽然新的学术著作——例如弗农·博格达诺的作品——已补充了传统文本，但较早的权威著作仍然深深植根于宪法推理之中。其影响力表明，理解英国宪法不仅需要阅读成文法，还需要研习教义性评注。

9. International Treaties | 国际条约

International treaties form another source of the UK constitution, as they impose obligations on the state that can affect domestic law and governance. Historically, the most significant example was the Treaty of Rome (1957), which brought the UK into the European Economic Community in 1973. Membership in the European Union meant that EU law took precedence over UK law under the European Communities Act 1972. Even after Brexit, international agreements such as the European Convention on Human Rights (ECHR), incorporated by the Human Rights Act 1998, continue to influence the constitution. Additionally, treaties like those establishing the United Nations and NATO shape defence and foreign policy powers of the executive.

国际条约是英国宪法的另一个来源，因为它们为国家设定义务，从而可能影响国内法和治理。历史上最重要的例子是1957年《罗马条约》，该条约使英国于1973年加入欧洲经济共同体。欧盟成员资格意味着根据1972年《欧洲共同体法》，欧盟法律优先于英国法律。即使脱欧之后，诸如由1998年《人权法》纳入的《欧洲人权公约》等国际协定仍然影响着宪法。此外，建立联合国和北约的条约等也塑造着行政部门的防务与外交政策权力。

10. The EU Law Legacy and Brexit | 欧盟法遗产与脱欧

Before Brexit, EU law was considered a distinct and overriding source of the UK constitution, based on the principle of supremacy. Directives and regulations could bind the UK without a fresh vote in Parliament, which challenged the traditional doctrine of parliamentary sovereignty. The exit process itself required a series of constitutional adjustments: a referendum (the first since 1975), a Supreme Court ruling (Miller I, 2017) that parliamentary approval was needed to trigger Article 50, and the European Union (Withdrawal) Act 2018 that repealed the 1972 Act and preserved most existing EU law as ‘retained EU law’. This episode illustrates how external commitments can transform and even partially unsettle the domestic constitutional order.

在脱欧之前，基于最高效力原则，欧盟法被视为英国宪法中一个独特且凌驾性的来源。各类指令和条例无需议会再次表决即可约束英国，从而挑战了传统的议会主权学说。脱欧进程本身要求一系列宪制调整：一次公投（1975年以来的首次），最高法院的裁决（2017年米勒第一案），要求议会批准才能触发《里斯本条约》第50条，以及2018年《退出欧盟法》，废止了1972年法令并将大部分既有欧盟法律保留为“保留欧盟法”。这段经历表明，外部承诺能够改变甚至在某种程度上动摇国内宪制秩序。

11. How the Five Sources Interact | 五大来源如何相互作用

The five sources do not exist in isolation; they form an interconnected network. A statute like the Human Rights Act 1998 incorporates international treaty obligations, and common law judges interpret the meaning of that statute using precedents. Conventions govern the very way Parliament passes statute law, and authoritative works explain the operation of both conventions and common law. This dynamic relationship ensures that the uncodified constitution remains adaptable to new circumstances while preserving fundamental principles. A change in one source — such as a landmark court ruling — may ripple through several others, demonstrating the living nature of the constitution.

这五个来源并非孤立存在，而是构成了一个相互关联的网络。像1998年《人权法》这样的成文法纳入了国际条约义务，而普通法法官则利用先例解释该法令的含义。惯例支配着议会通过成文法的具体方式，权威著作则阐述惯例与普通法的运作。这种动态关系确保不成文宪法既能适应新情况，又能维护根本原则。一个来源的变化——例如一个里程碑式法院裁决——可能波及其他多个来源，显示出宪法的活态性质。

12. The Significance for A‑Level Understanding | 对A‑Level学习的重要性

For Edexcel A‑Level students, recognising these five sources is fundamental to analysing topics such as parliamentary sovereignty, the rule of law, and the role of the judiciary. Examination questions often invite evaluation of whether the UK should adopt a codified constitution, requiring a clear grasp of how these sources currently operate and sometimes conflict. By separating the sources and then connecting them, students can construct nuanced arguments about the strengths and weaknesses of the UK’s uncodified system. It is precisely this blend of legal, historical, and political elements that makes the study of the UK constitution so intellectually rewarding.

对于Edexcel A‑Level的学生而言，认识到这五个来源是分析议会主权、法治和司法角色等主题的基础。考试题常常要求学生评价英国是否应当采用一部成文宪法，这需要清晰把握这些来源目前如何运作以及有时如何相互冲突。通过区分各个来源并将其联系起来，学生可以就英国不成文制度的优势与弱点构建细致的论证。正是这种法律、历史与政治元素的交融，才使得英国宪法的研习如此富有智识回报。

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