📚 The Development, Nature and Sources of the UK Constitution | 英国宪法的发展、性质与来源
The United Kingdom has a unique constitutional arrangement that sets it apart from most other democracies. Rather than being written into a single codified document, the UK constitution has evolved over centuries through a mixture of statutes, common law, conventions, and authoritative texts. This composite character means that understanding the British constitution requires not only a grasp of formal legal rules but also an appreciation of historical context and political practice. In this article, we examine the principal features that define the nature of the UK constitution, trace its historical development, and identify the diverse sources from which constitutional rules are drawn.
英国拥有一种独特的宪制安排，使其有别于绝大多数民主国家。英国宪法并未编纂为单一的成文文件，而是经过几个世纪的演进，由成文法、普通法、惯例和权威著作混合而成。这种复合特性意味着，理解英国宪法不仅需要把握正式的法律规则，还需要理解历史背景和政治实践。在本文中，我们将考察界定英国宪法性质的主要特征，追溯其历史发展，并识别构成宪法规则的各种来源。
1. The Uncodified and Unentrenched Constitution | 非成文与非刚性宪法
Perhaps the most distinctive feature of the UK constitution is that it remains uncodified, meaning that much of it is not collected in any single authoritative text. Unlike the United States, which has a single written constitution, the British system draws on multiple written and unwritten sources. This uncodified character makes the constitution flexible and relatively easy to amend, because no special procedure is required to change many of its rules. However, it also makes it harder for citizens to know exactly what their constitutional rights and duties are without consulting a wide range of documents and precedents. Closely linked to this is the fact that the constitution is unentrenched: Parliament can alter any aspect of it by passing an ordinary Act, as no constitutional law stands above ordinary legislation.
英国宪法最显著的特征之一，也许是它仍然是非成文的，意味着其大部分内容并未收录于任何单一的权威文本。与美国拥有一部单一成文宪法不同，英国的体制依赖多种成文和非成文的渊源。这种非成文特性使得宪法具有灵活性，相对容易修改，因为变更其许多规则并不需要特殊的程序。然而，这也使得公民若不查阅大量文件和先例，就更难以确切知晓自己的宪法权利和义务。与此密切相关的是，这部宪法是非刚性的：议会可以通过一项普通法案来更改宪法的任何方面，因为没有哪项宪法性法律凌驾于普通立法之上。
2. Parliamentary Sovereignty as the Bedrock Principle | 作为根本原则的议会主权
Central to the nature of the UK constitution is the doctrine of parliamentary sovereignty, traditionally associated with the jurist A.V. Dicey. According to this principle, Parliament is the supreme legal authority in the land and can make or unmake any law whatsoever. No court can strike down an Act of Parliament, and no Parliament can bind its successors. Over time, this absolute conception has been challenged by membership of the European Union (1973–2020), the devolution of powers to Scotland, Wales, and Northern Ireland, and the incorporation of the European Convention on Human Rights via the Human Rights Act 1998. Nevertheless, the legal sovereignty of Parliament remains the foundational rule from which other constitutional practices are derived, and Brexit has reaffirmed the primacy of Westminster in theory, even if political constraints continue to operate.
英国宪法性质的核心是议会主权学说，这一学说传统上与法学家A.V.戴雪联系在一起。根据这一原则，议会是国家的最高法律权威，可以制定或废除任何法律。法院不能推翻议会的法案，任何一届议会也约束不了其后届议会。随着时间的推移，这一绝对概念受到了欧盟成员身份（1973—2020年）、对苏格兰、威尔士和北爱尔兰的权力下放，以及通过1998年《人权法》吸收《欧洲人权公约》等事态发展的挑战。不过，议会的法律主权仍然是奠基性的规则，其他宪法实践都由此衍生，而且脱欧已在理论上重新确认了威斯敏斯特的首要地位，即便政治约束仍在运行。
3. The Rule of Law | 法治
Alongside parliamentary sovereignty, the rule of law is a fundamental constitutional principle. It ensures that government action is conducted within a framework of law, that laws are applied equally, and that individuals have access to justice. In the British context, the rule of law has been shaped by Dicey’s ideas: no one can be punished except for a distinct breach of the law established in the ordinary courts, everyone is subject to the same law regardless of status, and individual rights are secured through judicial decisions rather than a formal written constitution. The Constitutional Reform Act 2005 further strengthened this principle by establishing a clearer separation between the judiciary and the legislature, with the creation of the Supreme Court and the restructuring of the role of the Lord Chancellor.
与议会主权并列，法治是一项根本性的宪法原则。它确保政府行为在法律框架内进行，法律平等适用，个人有获取司法救济的渠道。在英国语境下，法治受到戴雪观点的影响：除非经由普通法院确认的明确违法行为，任何人不得受罚；不论身份地位，所有人都受同一法律约束；个人权利通过司法判决而非一部正式的成文宪法得到保障。2005年《宪制改革法》进一步强化了这一原则，通过设立最高法院并重构大法官的角色，建立了立法与司法之间更清晰的分离。
4. The Unitary State with Devolution | 单一制国家与权力下放
Historically the UK is a unitary state, meaning that sovereignty rests in one central authority — the Westminster Parliament. All local and regional governments derive their powers from that central source. Since the late 1990s, however, a significant process of devolution has created elected assemblies in Scotland, Wales, and Northern Ireland, with varying legislative and executive responsibilities. Devolution has introduced quasi-federal features into what remains in law a unitary state, because the UK Parliament still retains the power to legislate on all matters and could, in theory, revoke the delegated powers. The asymmetrical nature of devolution — with different levels of power granted to each region — adds complexity to the constitutional landscape and has prompted ongoing debate about England’s representation, sometimes referred to as the ‘West Lothian question’.
从历史上看，英国是一个单一制国家，意味着主权归于一个中央权威，即威斯敏斯特议会。所有地方和地区政府都从这一中央源头取得权力。然而，自20世纪90年代末以来，一个重大的权力下放进程在苏格兰、威尔士和北爱尔兰创立了民选议会，并赋予其不同程度的立法和行政责任。权力下放给在法律上仍属单一制的国家带来了准联邦特征，因为英国议会仍保留就所有事项立法的权力，理论上可以收回下放的权力。权力下放的非对称性——每一地区获得不同程度的权力——增加了宪法图景的复杂性，并引发了关于英格兰代表权问题的持续争论，即所谓“西洛锡安问题”。
5. Constitutional Monarchy and the Crown | 君主立宪制与王权
The UK is a constitutional monarchy where the monarch is the head of state but acts within legal and conventional constraints. Today, the sovereign’s powers — known as the royal prerogative — are largely exercised on the advice of ministers, reflecting the principle that the monarch reigns but does not rule. Key prerogative powers include the granting of royal assent to legislation, the appointment of the Prime Minister, the summoning and dissolution of Parliament, and the negotiation of treaties. The personal discretion of the monarch is now extremely limited and governed by convention, but the prerogative remains a significant reservoir of executive authority, with some aspects, such as the power to deploy armed forces, still exercised by ministers under the prerogative rather than by statute.
英国是一个君主立宪制国家，君主为国家元首，但在法律和常规约束下行事。如今，君主的权力——即所谓皇家特权——大多依据大臣的建议来行使，体现了君主统而不治的原则。关键的特权权力包括批准法律、任命首相、召集和解散议会以及谈判条约。如今，君主的个人裁量权极为有限并受惯例支配，但是特权依然是行政权力的一个重要储备，某些方面，如部署武装力量的权力，仍旧由大臣根据特权而非成文法来行使。
6. Major Historical Milestones in Development | 发展过程中的重大历史里程碑
The development of the UK constitution can be traced through landmark documents and events. Magna Carta (1215) established the principle that the king was subject to the law and provided for certain feudal liberties, laying an early foundation for the rule of law. The Bill of Rights (1689) further curtailed royal power by prohibiting the suspension of laws without Parliament’s consent, affirming free elections, and establishing parliamentary privilege. The Act of Settlement (1701) secured judicial independence by guaranteeing that judges could not be removed without the consent of both Houses. The Parliament Acts of 1911 and 1949 removed the House of Lords’ absolute veto over legislation, thereby consolidating democratic legitimacy in the Commons. Later, the European Communities Act 1972 gave effect to EU law in the UK, profoundly influencing the constitution until its repeal by the European Union (Withdrawal) Act 2018. The Human Rights Act 1998 incorporated the European Convention on Human Rights into domestic law, creating a legal framework within which individuals could enforce their Convention rights in UK courts.
英国宪法的发展可以通过标志性文件和事件来追溯。《大宪章》（1215年）确立了国王须服从法律的原则，并规定了某些封建自由，为法治奠定了早期基础。《权利法案》（1689年）进一步限制了王权，禁止未经议会同意而中止法律，确认自由选举，并确立议会特权。《王位继承法》（1701年）通过保证未经两院同意不得解除法官职务，确保了司法独立。1911年和1949年的《议会法》取消了上议院对立法的绝对否决权，从而将民主合法性集中在下议院。后来，1972年《欧洲共同体法》使欧盟法律在英国生效，深刻影响了宪法，直至2018年《退出欧盟法》将其废除。1998年《人权法》将《欧洲人权公约》纳入国内法，创造了一个法律框架，个人可据此在英国法院主张其公约权利。
7. Statute Law as a Source of the Constitution | 作为宪法渊源的成文法
Statute law — Acts of Parliament — constitutes the most formal and visible source of the UK constitution. Many statutes have constitutional significance because they define the structure of government, the relationship between citizen and state, or the powers of key institutions. Examples include the Parliament Acts mentioned above, the Scotland Act 1998, the Human Rights Act 1998, the Constitutional Reform Act 2005, and the Fixed-term Parliaments Act 2011 (though that Act has since been repealed). Because Parliament is sovereign, any new statute can override existing constitutional arrangements, making statute law both a fundamental source and a mechanism of change. This also means that the relative weight of constitutional statutes can alter with political climates, as seen with the EU (Withdrawal) Acts in the Brexit process.
成文法——即议会法案——构成了英国宪法最正式、最可见的渊源。许多制定法具有宪法意义，因为它们界定了政府结构、公民与国家的关系，或关键机构的权力。例如，前面提到的议会法、1998年《苏格兰法》、1998年《人权法》、2005年《宪制改革法》，以及2011年《固定任期议会法》（尽管该法后来已被废除）。由于议会享有主权，任何新制定法都可以推翻既有的宪法安排，这使得成文法既是根本性的渊源，又是变革的机制。这也意味着，宪制性成文法的相对分量可能随政治气候而变，正如脱欧过程中的各项退出法案所示。
8. Common Law and Judicial Precedent | 普通法与司法先例
Common law refers to legal principles developed by judges through the decisions of courts. Unlike statute, common law is not enacted by Parliament but evolves case by case. Many fundamental rights and constitutional principles — such as the right to a fair hearing, the presumption of innocence, and the control of executive discretion — have their origins in common law rulings. The courts have developed doctrines like residual freedom (everything is permitted unless prohibited) and the principle of legality, which presumes that Parliament does not intend to override fundamental rights without clear words. While statute can always displace common law, judges continue to play a creative constitutional role by interpreting legislation and reviewing the legality of executive action through judicial review.
普通法指法官通过法院判决发展出来的法律原则。与制定法不同，普通法并非由议会制定，而是通过一个个判例逐渐形成。许多基本权利和宪法原则——如得到公正审理的权利、无罪推定，以及对行政裁量的控制——均起源于普通法判决。法院发展了诸如剩余自由（未经禁止即属允许）和合法性原则等学说，后者假定议会若无明确措辞便无意推翻基本权利。尽管制定法总是可以取代普通法，但法官通过解释立法以及通过司法审查来审查行政行为的合法性，继续扮演着创造性的宪法角色。
9. Constitutional Conventions | 宪法惯例
Conventions are non-legal rules that are nonetheless binding in the political realm. They fill gaps where the law is silent and ensure that the formal powers of institutions work in a democratically accountable way. Examples include the convention that the monarch appoints as Prime Minister the person most likely to command the confidence of the House of Commons, that ministers are individually and collectively responsible to Parliament, and that the House of Lords does not block legislation that implements a manifesto commitment of the governing party (the Salisbury convention). Because conventions are not enforceable in courts, their effectiveness relies on political acceptance and the fear of constitutional crisis. They can evolve and sometimes fade away without any formal process, giving the constitution fluidity.
宪法惯例是非法律性的规则，却在政治领域具有约束力。它们填补了法律未予以规定的空白，并确保机构的正式权力以民主问责的方式运行。例如，君主任命最有可能获得下议院信任的人为首相，大臣对议会承担个人和集体责任，上议院不阻挠落实执政党竞选纲领承诺的立法（索尔兹伯里惯例）。由于惯例在法院不可强制执行，其有效性依赖于政治上的接受和对宪制危机的忌惮。它们可以在没有任何正式程序的情况下演化，有时也会逐渐消失，赋予宪法以流动性。
10. Authoritative Works and Academic Commentary | 权威著作与学术评注
In the absence of a codified document, the writings of respected constitutional experts have themselves become a source of guidance. Dicey’s ‘Introduction to the Study of the Law of the Constitution’ (1885) defined parliamentary sovereignty and the rule of law in ways that are still routinely cited in courts and parliamentary debate. Other influential texts include Erskine May’s ‘Parliamentary Practice’, which is treated as the authoritative guide to parliamentary procedure, and works by Ivor Jennings and Sir William Wade. While such writings do not have the status of law, they inform judicial reasoning and political practice, often consolidating unwritten conventions into something more tangible.
在缺少成文宪法文件的情况下，受尊敬的宪法专家的著述本身已成为一种指引的来源。戴雪的《宪法研究导论》（1885年）对议会主权和法治作出的界定，至今仍被法院和议会辩论中经常援引。其他有影响力的文本包括厄斯金·梅的《议会实务》，被视为议会程序的权威指南，以及伊沃·詹宁斯和威廉·韦德爵士的著作。虽然这类著述不具法律地位，但它们为司法推理和政治实践提供依据，常常将不成文的惯例整合成更为具体的形式。
11. European and International Influences | 欧洲与国际影响
For nearly five decades, EU law was a dynamic source of the UK constitution, often taking precedence over domestic law under the European Communities Act 1972. It contributed principles such as proportionality, legal certainty, and supremacy of EU law, which reshaped British legal thinking. After Brexit, retained EU law still forms part of domestic law unless subsequently modified by Parliament, so the constitutional influence endures. Moreover, the European Convention on Human Rights, as applied through the Human Rights Act, continues to shape the protection of rights in the UK, even if the Act itself could be reformed or replaced. International treaties generally do not become part of domestic law without parliamentary legislation, but they influence constitutional norms and judicial interpretation.
在将近半个世纪的时间里，欧盟法律是英国宪法的一个动态来源，根据1972年《欧洲共同体法》，其效力常优先于国内法。它引入了比例性、法律确定性、欧盟法优先等原则，重塑了英国的法律思维。脱欧之后，保留的欧盟法律仍构成国内法的一部分，除非议会随后加以修改，因此宪制上的影响依然存在。此外，通过《人权法》适用的《欧洲人权公约》，继续影响着英国的权利保障，即使该法本身可能被改革或取代。一般而言，未经议会立法，国际条约并不成为国内法的一部分，但它们影响宪制规范和司法解释。
12. The Dynamic and Evolving Character of the Constitution | 宪法的动态与演进特性
Ultimately, the UK constitution is best understood as a living organism rather than a fixed design. Its sources are plural, its rules are sometimes ambiguous, and its operation relies on a delicate balance between law and politics. Pressures such as devolution, judges’ expanding role in rights protection, referendums on major issues, and reforms to the House of Lords are continually reshaping the constitutional order. The absence of a codified text allows adaptation but also raises questions about accessibility and clarity. This enduring tension between flexibility and certainty is perhaps the defining challenge of the UK constitution today, making the study of its development, nature, and sources as relevant as ever for any student of British government and politics.
归根结底，英国宪法最好被理解为一个活的有机体，而非一个固定的设计。它有多种渊源，规则有时模糊不清，运作依赖于法律与政治之间的微妙平衡。权力下放、法官在权利保障方面角色的扩大、重大议题的公投以及上议院改革等压力，正在不断重塑宪制秩序。没有成文文本使得适应性成为可能，但也提出了关于易得性和清晰度的问题。灵活性与确定性之间的这种持久张力，或许正是当今英国宪法所面临的典型挑战，也使得对它的发展、性质和来源的研究，对任何学习英国政府与政治的学生而言，都一如既往地重要。
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