The exam board rotates which constitutional debate gets the Q2 essay each year. Codification has not been the central question since 2020. Five years is a long time for the topic to wait, so it is overdue.
Three recent events make codification a strong choice. First, the 2024 Labour government has begun a constitutional reform programme: Lords reform, lowering the voting age to 16, devolved powers expansion. This puts written-constitution debates back on the political agenda. Second, the 2023 Supreme Court ruling on Rwanda showed how the executive can stretch existing constitutional limits when there is no codified bar. Third, the 2025 examiner report flagged that the strongest essay answers used contemporary examples and showed change-over-time, both of which codification questions reward.
This is a Section A 30-mark essay. Marks split AO1 (your knowledge of the codification debate), AO2 (analysis of the arguments), AO3 (a clear judgement). Paper 2 essays carry an extra synoptic clause: no synoptic points = no Level 5. Synoptic points link UK Government content to political participation, parties, voting or ideologies.
A codified constitution would set out the rules of UK government in a single document that citizens, courts and politicians could read. The current uncodified constitution is scattered across statute (Magna Carta 1215, Bill of Rights 1689, Parliament Acts 1911 and 1949, the European Communities Act 1972, the Human Rights Act 1998, the Constitutional Reform Act 2005, the Fixed-term Parliaments Act 2011 - now repealed, the Brexit-era statutes), common law, conventions and authoritative texts. The 2019 Supreme Court ruling against Boris Johnson on prorogation showed how courts must reach for common-law principles in the absence of a written rule. A codified constitution would make the rules visible and accessible, reducing the legitimacy gap between government and governed.
The Human Rights Act 1998 is statute, not constitutional law. A future Parliament can repeal or replace it - the 2022 Conservative Bill of Rights Bill attempted this. Successive governments have considered scrapping the HRA. Under a codified constitution, fundamental rights would be entrenched and only changeable by a special procedure (e.g. two-thirds majority of both Houses, or referendum approval). This is the protection model the United States, Germany, Canada and Ireland use. The 2024 Begum case and the Rwanda Bill 2023 both highlighted how the lack of constitutional rights protection allows politically-driven legislation to override settled principles.
The 2019 prorogation case (Miller II) showed that the executive can stretch constitutional limits when only conventions stand in the way. Boris Johnson's prorogation was ruled unlawful only after the Supreme Court reached for the common-law principle of parliamentary sovereignty. A codified constitution would set out clearly what the Prime Minister can and cannot do with prerogative powers. The 2023 Rwanda Bill explicitly told courts not to apply the HRA to certain decisions - a move that would be much harder under a codified system with entrenched judicial review.
The current devolution settlement is a patchwork: Scotland, Wales and Northern Ireland have different powers under separate Acts. The 2014 Scottish independence referendum and the 2016 Brexit vote raised hard questions the uncodified constitution could not cleanly answer. A codified constitution could lock in devolution as a structural feature of the state, removing the threat of a future Westminster government simply legislating it away.
Public confidence in the political system is at a low point - YouGov polling in early 2026 placed trust in Westminster at a record low. Codified constitutions in Germany and Ireland are linked to higher democratic legitimacy and participation rates. A written constitution that citizens could read would help close the legitimacy gap.
The UK's uncodified constitution adapts continuously without the need for elaborate amendment procedures. Devolution to Scotland, Wales and Northern Ireland in 1997-99 took simple Acts of Parliament. Brexit was achieved through legislation. The Constitutional Reform Act 2005 created the Supreme Court and reformed the Lord Chancellor's role through ordinary statute. Compare with the United States, where constitutional amendments require two-thirds of Congress plus three-quarters of state legislatures - it has not happened on a substantive issue since 1971. UK reform is faster.
A codified constitution by definition limits parliamentary sovereignty - the principle that no Parliament can bind its successor. Under codification, an entrenched constitution would override ordinary legislation. This is a major break with the Diceyan tradition. Critics argue this transfers power from elected MPs to unelected judges who interpret the constitution. The US Supreme Court's overturning of Roe v Wade in 2022 showed how constitutional courts can deliver politically contentious rulings unaccountable to voters.
A codified constitution makes the judiciary the ultimate constitutional authority. Senior judges become political actors. The US example is instructive: appointments to the Supreme Court are now intensely political, with confirmation hearings dominated by ideological fights (Kavanaugh 2018, Barrett 2020, Jackson 2022). Critics argue codification would import this politicisation into the UK system.
The 2024 Labour government has begun reform of the House of Lords - removing remaining hereditary peers. This is being done through ordinary legislation. Under a codified constitution that entrenched the bicameral structure, such reform would require a constitutional amendment. The flexibility of the uncodified system allows incremental modernisation.
Conservative ideology specifically values traditional, evolved institutions over abstract designed ones. Edmund Burke's argument that constitutions are 'partnerships between past, present and future generations' resists codification. The Conservative Party's 2022 Bill of Rights proposal would have weakened, not codified, rights protection - illustrating the political vulnerability of a 'codified' constitution to partisan rewriting.
Edexcel mark schemes and examiner reports are clear: top-band answers commit to one side and defend it. Answers that fence-sit are capped at Level 3.
The stronger answer is that codification would do MORE GOOD than harm. The flexibility argument is real but the cost - rights vulnerability, executive overreach, devolution insecurity - is now too high. The Rwanda case and the 2022 Bill of Rights attempt show how a future government can simply rewrite the rules. Parliamentary sovereignty served the UK well in stable times but has become a vulnerability in an era of populism and rapid policy change. Codification with a moderate amendment threshold (not the US two-thirds super-majority) would deliver legitimacy and rights gains without the rigidity critics fear.
Paper 2 essays cap at Level 4 if there are no synoptic points. Codification synoptic links:
Codification would do more good than harm. Rights protection, executive constraint and devolution security outweigh the loss of flexibility. The 2022 Bill of Rights attempt and the 2023 Rwanda Bill show the cost of leaving rights as ordinary statute.