Click any step to jump to it - the lit step is the one showing below. Left to right: a strong reforming start that loses momentum and is partly reversed. Green = strengthened or expanded · Amber = mixed or contested · Red = weakened or reversed.
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What happened. Under Tony Blair's first government, the Human Rights Act 1998 brought the European Convention on Human Rights into UK law, while the Scotland Act 1998, Government of Wales Act 1998 and Northern Ireland Act 1998 created the three devolved bodies.
What it shows. Convention rights became enforceable in UK courts for the first time and power was dispersed to Scotland, Wales and Northern Ireland - the foundation of the whole reform era. Rights + dispersal
What happened. The House of Lords Act 1999 removed all but 92 hereditary peers. The 92 were kept under the Weatherill compromise negotiated between Lord Chancellor Derry Irvine and the Conservative leader in the Lords, Viscount Cranborne.
What it shows. The second chamber was made more legitimate and less hereditary, but it stayed wholly unelected and the "temporary" 92 lasted 25 years. Modernised
What happened. The Freedom of Information Act 2000, taken through by Home Secretary Jack Straw, created a public right of access to official information (in force January 2005).
What it shows. Government was opened to public and press scrutiny, though Tony Blair later named it one of his biggest regrets in office. Transparency
What happened. The Constitutional Reform Act 2005, steered by Lord Chancellor Lord Falconer, created the UK Supreme Court (opened 2009), set up the Judicial Appointments Commission and removed the Lord Chancellor's judicial role.
What it shows. The senior judiciary was separated from Parliament and the executive - the clearest strengthening of the separation of powers in the era. Separation of powers
What happened. The Fixed-term Parliaments Act 2011, a product of the Cameron-Clegg coalition, set five-year terms and removed the PM's power to call an election at will, requiring a two-thirds Commons vote or a no-confidence motion.
What it shows. An attempt to constrain the executive's prerogative over the election timetable, born of coalition mistrust between David Cameron and Nick Clegg. Constraint
What happened. The 2016 referendum, called by David Cameron, led to the European Union (Withdrawal) Act 2018 and the European Union (Withdrawal Agreement) Act 2020 under Boris Johnson; the UK left the EU on 31 January 2020. The Miller cases (2017 and 2019) forced Parliament's role and struck down the 2019 prorogation.
What it shows. The biggest constitutional change since the European Communities Act 1972 - parliamentary sovereignty reasserted, with the courts shaping the process. Major change
What happened. The Dissolution and Calling of Parliament Act 2022, under Boris Johnson, repealed the Fixed-term Parliaments Act and returned the power to dissolve Parliament to the royal prerogative.
What it shows. A flagship reform undone by an ordinary Act of Parliament - the lack of entrenchment laid bare. Undone
What happened. Keir Starmer's Labour government began its programme with the House of Lords (Hereditary Peers) Bill to remove the remaining 92 hereditary peers.
What it shows. The reform agenda is still open more than 25 years on - modernisation continues but stays piecemeal and unentrenched. Continues
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The first New Labour term delivered the bulk of it: the Human Rights Act and devolution in 1998, Lords reform in 1999, and Freedom of Information in 2000. Each dispersed power or opened government - a genuine modernisation of an old, centralised constitution.
The Constitutional Reform Act 2005 is the most complete reform, creating a Supreme Court separate from Parliament and recasting the Lord Chancellor's role. The Fixed-term Parliaments Act 2011 tried to constrain the executive's control of the election timetable.
But the reform era's weakness is exposed by what came next. The FTPA was repealed in 2022 by an ordinary Act, handing the prerogative of dissolution back to the executive. Brexit reshaped the constitution again, and the 2024 Labour programme shows the agenda is still open. Almost nothing has been given higher-law status.
The same events split by side. Build each paragraph around one point from each column, then judge.
The mixed events work on both sides: the 2011 FTPA looks like a constraint on the executive but its easy repeal proves the reversibility point, and Brexit 2016-20 was a vast change yet exposed unsettled questions over sovereignty.
For "Evaluate the view that constitutional reform since 1997 has been effective" or any codification question, this timeline supplies the evidence. The HRA, devolution and the CRA 2005 argue reform has modernised the constitution; the FTPA repeal and the unentrenched, unfinished agenda argue it is piecemeal and reversible. End each paragraph with an interim judgement.
Keep the dates precise: HRA and devolution 1998, House of Lords Act 1999, FOI Act 2000 (in force 2005), CRA 2005, Supreme Court opened 2009, FTPA 2011 and its repeal in 2022.