Reform and the future of the UK constitution

Constitutional reform is the recurrent theme of UK public-law literature: the constitution is uncodified, asymmetrically structured, and accumulates pressure points faster than they can be resolved. This week takes stock of the principal contemporary reform debates and asks why some have produced change (devolution; the Constitutional Reform Act 2005; the FTPA 2011 and its repeal) while others have stalled (electoral reform; full Lords reform; codification).

The topic is necessarily synoptic — it draws together strands from every preceding week. The doctrinal foundation is W1 (sovereignty) — most reform proposals confront the question whether they can be entrenched against future Parliaments. The architectural foundation is W4–W5 (rule of law; separation of powers) — what does ''reform'' mean if the criteria are themselves contested. The institutional foundation is W6–W11 (prerogative; devolution; HRA) — most live reform debates concern these specific institutions.

Five reform debates structure the week. (1) Codification: should the constitution be written down? (2) The House of Lords: should it be elected, abolished, reformed, or left alone? (3) Devolution: is the asymmetric settlement stable or in need of replacement? (4) The HRA and the ECHR: should the UK leave Strasbourg, repeal the HRA, or maintain the status quo? (5) Electoral reform: is FPTP politically and democratically defensible? Each debate is presented with its principal arguments, the political feasibility analysis, and the comparative material that informs it.

The history of UK constitutional reform is a history of asymmetric momentum. Major reforms cluster around political moments — the Reform Acts of 1832, 1867, 1884; the Parliament Acts of 1911 and 1949; the Statute of Westminster 1931; the post-1997 reforms (Scotland Act, Wales Act, Northern Ireland Act, GLA Act, Human Rights Act, Freedom of Information Act, Constitutional Reform Act 2005); the Brexit-era settlement (the European Union (Withdrawal) Acts 2018–20; the Internal Market Act 2020).

Reform momentum has typically required three conditions: (i) sustained political demand from a coherent constituency (the Chartists; the suffragettes; the post-1979 Scottish constituency for devolution); (ii) a government willing to legislate (the post-1997 Labour governments; the post-2019 Conservative governments on Brexit); (iii) cross-party acceptance that the reform is part of the constitutional settlement (achieved for devolution and the HRA; not achieved for electoral reform or full Lords reform). Where any condition fails, reform stalls.

The post-2010 period has been one of partial entrenchment and contested change. The Coalition Government''s reform programme (House of Lords Reform Bill 2012, withdrawn; the AV referendum 2011; the FTPA 2011) achieved one major success (FTPA, since repealed), one major failure (Lords reform), and one outright defeat (AV). The 2016–24 period has been dominated by Brexit and its constitutional consequences — the most significant period of constitutional change since 1997, but driven by external rupture rather than considered reform.

The 2024 Labour Government has promised a more modest reform programme: removal of the remaining hereditary peers from the Lords (the Hereditary Peers Bill 2024); elected mayors and metropolitan combined authorities; potential reform of the relationship between Westminster and the devolved institutions. Whether these proposals succeed depends on the post-2024 political conjuncture.

Three structural principles bear on every reform debate.

(1) Parliamentary sovereignty as the constitutional starting point. The orthodox Diceyan position is that Parliament can make or unmake any law and no Parliament can bind its successors. This principle is the doctrinal floor under every reform proposal: a reform that requires entrenchment must explain how it can be entrenched against subsequent parliamentary majorities. The Jackson dicta on ''constitutional fundamentals'' (Lord Hope; Lord Steyn) and the Thoburn doctrine on ''constitutional statutes'' (Laws LJ in Thoburn v Sunderland City Council [2002] EWHC 195 (Admin)) provide partial answers, but neither displaces the orthodox view that primary legislation can in principle modify any prior legislation. The codification debate (§07) turns on whether this principle is itself reformable.

Five graded practice questions are provided below — two foundation questions on constitutional statutes and Lords reform, two standard questions on codification and devolution, and one challenge question on the Scottish question and the political conditions for reform.

See the Further Reading panel for the canonical sources: Bogdanor, Hennessy, Tomkins, Loughlin, the Wakeham Commission, the IHRA Review, and the post-Miller II commentary.