Introduction
A constitution establishes the structural framework of government, whereas constitutionalism represents a normative political philosophy founded on limited government, the rule of law, and checks and balances against arbitrary state power. As affirmed in I.R. Coelho v. State of Tamil Nadu (2007), constitutionalism ensures that state authority remains strictly within circumscribed boundaries. The mere presence of a codified document offers no guarantee of constitutionalism, as history shows authoritarian regimes often operate under formal, written constitutions.
The Concept of Constitutionalism
Constitutionalism implies that governance must conform to principles of restraint, fundamental liberties, and institutional accountability. While a written constitution provides parchment barriers, constitutionalism reflects the active operationalization of checks and balances, an independent judiciary, and the preservation of human dignities against majoritarian or executive overreach.
Relevance and Operation of Constitutionalism in the UK
Despite possessing an uncodified constitution and adhering to A.V. Dicey's principle of Parliamentary Sovereignty, the United Kingdom sustains a vibrant culture of constitutionalism through several institutional mechanisms:
- Diceyan Rule of Law and Common Law Rights: The judiciary interprets laws with a presumption against the infringement of fundamental freedoms, ensuring executive actions remain subject to legal scrutiny.
- Statutory Frameworks for Rights: Enactments such as the Human Rights Act 1998 incorporate the European Convention on Human Rights into domestic law, allowing courts to issue declarations of incompatibility when legislation breaches rights.
- Judicial Checks on Prerogative Powers: In the landmark Miller II case (R v. The Prime Minister, 2019), the UK Supreme Court held the executive's prorogation of Parliament unlawful, asserting that the Crown's prerogative cannot be exercised to frustrate parliamentary accountability.
- Constitutional Conventions: Long-standing unwritten norms, such as ministerial accountability to Parliament, enforce political and institutional self-restraint without formal codification.
Challenges of Constitutionalism in Unwritten Constitutions
Operating an unwritten or uncodified constitutional model poses distinct structural challenges:
- Risk of Elective Dictatorship: As termed by Lord Hailsham, a government with a disciplined legislative majority can enact radical or regressive laws without any substantive constitutional veto.
- Absence of the Basic Structure Doctrine: Courts cannot strike down primary acts of Parliament. Unlike the Indian Supreme Court under the Kesavananda Bharati framework, UK courts cannot invalidate legislation on grounds of constitutional invalidity.
- Fragility of Conventions: Unwritten conventions depend purely on political consensus and lack judicial enforceability, making them vulnerable to erosion during intense political polarisation or institutional crises.
- Ambiguity in Emergencies: Without explicit written procedural limits, boundary disputes between the executive, legislature, and judiciary can trigger prolonged constitutional friction.
Conclusion
Constitutionalism ultimately relies not merely on parchment guarantees or codified texts, but on an enduring democratic culture, robust institutional checks, and continuous civic vigilance to sustain limited government.