← Back to blog

Devolution in the UK Constitution for SQE1

Part of our SQE1 Constitutional and Administrative Law guide → View the full SQE1 Constitutional and Administrative Law guide

09 Apr 2026

Devolution is the transfer of legislative and executive power to Scotland, Wales and Northern Ireland. Understanding reserved and devolved matters, the Sewel Convention and limits on legislative competence is essential for SQE1.

Constitutional and Administrative Law and EU Law > Devolution in the UK Constitution

Devolution is the transfer of legislative and executive power from Westminster to Scotland, Wales and Northern Ireland. It is a key feature of the modern UK constitution and a worth revising carefully area in SQE1. Understanding the scope of devolved powers, what matters are reserved to Westminster, and the Sewel Convention is essential.

What is Devolution in SQE1?

Candidates often assume the Sewel Convention prevents Westminster from legislating on devolved matters — a trap that costs marks on SQE1. Devolution is not independence — it is the delegation of legislative and executive power to regional governments while Westminster retains overall sovereignty. Each devolved legislature has different powers: Scotland has the broadest legislative competence, while Wales has narrower powers (though these have expanded), and Northern Ireland's position is distinctive due to the Good Friday Agreement.

The devolution settlements are not symmetric — they give different powers to different regions and reflect their distinct constitutional histories and negotiations.

Key Principles for SQE1

  • Reserved matters: some policy areas remain the exclusive responsibility of Westminster. These are specified in the devolution legislation and include foreign affairs, defence, taxation (largely), social security, and employment law. The Westminster Parliament can legislate on reserved matters; the devolved legislatures cannot. If a devolved legislature purports to legislate on a reserved matter, the legislation is ultra vires.

  • Devolved matters: all other matters (not reserved) are devolved. The devolved legislatures have power to legislate on devolved matters, including education, health, local government, housing, agriculture, culture, and much of criminal law. However, the scope of devolved matters differs between Scotland, Wales and Northern Ireland.

  • Scotland: the Scottish Parliament has broad legislative competence over all matters except those reserved to Westminster (the "negative list" approach). This gives Scotland significant autonomy. Reserved matters include UK defence, foreign affairs, taxation (though Scottish Parliament can set income tax rates), social security benefits, and employment law.

  • Wales: the Welsh Senedd (National Assembly for Wales) initially had narrower powers based on specific listed areas (the "positive list" approach). Powers have been significantly expanded by the Government of Wales Acts 2006 and 2011. The Senedd can now legislate on a wide range of matters, and the process now resembles Scotland's approach more closely.

  • Northern Ireland: the Northern Ireland Assembly operates under the Good Friday Agreement (Belfast Agreement). The Assembly has powers over devolved matters, but the executive is structured to ensure power-sharing between communities. Certain matters (such as those affecting the Irish border or with cross-border implications) require special procedures.

  • Legislative Competence: devolved legislatures can only legislate within their competence. Courts can review whether legislation falls within competence. If the legislation is outside competence, it is ultra vires. The Supreme Court has jurisdiction over devolution competence disputes.

  • The Sewel Convention: the UK Parliament will not normally legislate on devolved matters without the consent of the relevant devolved legislature. This convention is politically important but not legally enforceable. In R (Miller) v Secretary of State for Exiting the EU [2017], the Supreme Court confirmed that the Sewel Convention is not justiciable — courts cannot enforce it or strike down Westminster legislation for breach. This interconnects with how constitutional conventions operate more broadly and parliamentary sovereignty functions in relation to devolved powers. This is a crucial distinction for SQE1.

  • Executive Devolution: devolved governments exercise executive powers (such as running health services, education, local government) within their devolved areas. Ministers in devolved governments are accountable to devolved legislatures, not Westminster.

  • Tax Powers: tax powers are an important aspect of devolution. Scotland can set income tax rates (within limits). Wales has limited tax-varying powers. Northern Ireland has limited tax powers.

  • The Good Friday Agreement and Northern Ireland: the Belfast Agreement (1998) is a unique basis for Northern Ireland's devolution, reflecting the peace process and the constitutional position of the island of Ireland. It includes safeguards for both communities and mechanisms for power-sharing in the executive.

  • Co-operative Federalism: while Westminster retains sovereignty over devolved areas, the devolution settlements involve cooperation between the UK government and devolved governments on cross-cutting issues (such as environment, health policy coordination) and joint arrangements.

Exam tip

The biggest SQE1 trap is assuming the Sewel Convention is legally enforceable. It is not. Westminster can legislate on devolved matters without devolved consent — it is politically controversial to do so, but legally valid. Also, remember that devolution is not symmetrical — Scotland, Wales, and Northern Ireland have different arrangements. Finally, reserved matters cannot be touched by devolved legislatures; the distinction between reserved and devolved is critical for identifying ultra vires acts.

How This Appears in SQE1 Questions

SQE1 questions typically present a scenario where a devolved legislature has passed legislation and someone challenges it as ultra vires or where a question arises about whether the Sewel Convention applies. This is a common SQE1 pitfall where the distinction between political and legal enforceability is crucial. The question tests whether you correctly identify reserved versus devolved matters and understand that the Sewel Convention is not legally enforceable.

Example scenario: The Scottish Parliament passes legislation regulating employment law. The UK Government argues the Scottish Parliament lacks competence because employment law is partially reserved to Westminster. The Scottish Parliament responds that the legislation affects only employment matters devolved to Scotland.

Analysis: The question is whether employment law (or the particular aspect being regulated) is reserved or devolved. If reserved, the Scottish Parliament cannot legislate (ultra vires). If devolved, it can. This is a competence question — courts will examine the reserved matters list and determine whether the legislation falls within it. If it exceeds competence, the legislation is void.

This is a common SQE1 pitfall: candidates correctly identify that devolution is involved but fail to distinguish reserved from devolved matters or assume the Sewel Convention prevents Westminster from legislating on devolved matters. The Sewel Convention does not prevent Westminster; it is merely a political courtesy.

Common Mistakes Students Make

  • Assuming the Sewel Convention is legally enforceable — it is a political convention; courts will not enforce it
  • Confusing reserved and devolved matters — know which areas are reserved to Westminster in each devolution settlement
  • Treating all devolution settlements as identical — Scotland, Wales and Northern Ireland have different arrangements
  • Forgetting that Westminster retains sovereignty — devolution is delegation, not independence; Westminster can legislate on devolved matters (though politically controversial)
  • Missing that devolved legislation outside competence is ultra vires and void
  • Assuming the Good Friday Agreement gives Northern Ireland independence or special status — it establishes power-sharing, not independence
  • Forgetting that executive power (running services) is also devolved, not just legislative power
  • Missing that devolution disputes go to the Supreme Court — courts have jurisdiction over competence questions

Quick Summary

  • Devolution transfers legislative and executive power to Scotland, Wales and Northern Ireland, but Westminster retains overall sovereignty
  • Reserved matters remain the exclusive responsibility of Westminster and cannot be legislated on by devolved legislatures
  • Devolved matters are within the competence of devolved legislatures; reserved matters are not
  • Scotland has broad legislative competence over all non-reserved matters (negative list approach)
  • Wales has expanding powers over devolved matters (moved from positive to negative list approach)
  • Northern Ireland operates under the Good Friday Agreement with power-sharing arrangements
  • The Sewel Convention (consulting devolved legislatures) is politically important but not legally enforceable
  • Courts can review whether devolved legislation exceeds devolved competence (ultra vires)
  • Devolution settlements are not symmetric; they reflect different constitutional histories and negotiations

Want to test this now? Try a few SQE1-style questions below before moving on.

Test Yourself

Test yourself

Quick check questions based on this article.

Question 1

Scenario

The Senedd Cymru passes an Act concerning environmental standards for agricultural land in Wales. The Act imposes stricter regulations on the use of pesticides than the equivalent English legislation. A farming company that operates farms in both England and Wales argues that the Senedd had no competence to pass the Act because environmental regulation is not listed as a devolved matter. The company's solicitor examines the Government of Wales Act 2006 to determine whether the Senedd acted within its legislative competence. The solicitor notes that agriculture and the environment are not listed as reservations in Schedule 7A to the Government of Wales Act 2006 (as amended by the Wales Act 2017). The company argues that the Senedd Act is invalid because it affects cross-border farming operations. The Welsh Government responds that the Senedd has competence over matters that are not reserved to Westminster. The company's chief executive has made public statements criticising the Welsh Government's environmental policies. The farming company also argues that the Act conflicts with an existing Act of the United Kingdom Parliament that sets national minimum environmental standards. The Welsh Government argues that the Senedd Act is compatible with the UK Act because it sets higher, not lower, standards. The solicitor advises the company on whether the Senedd Act is within the Senedd's legislative competence. The solicitor is also aware that the company has recently appointed a new compliance officer.

Is the Senedd Act likely to be within the legislative competence of the Senedd Cymru?

Question 2

Scenario

The Senedd Cymru (Welsh Parliament) passes an Act concerning the regulation of environmental standards for agricultural land in Wales. A farming union challenges the Act, arguing that the regulation of agriculture is a matter reserved to the UK Parliament at Westminster. The Senedd's Presiding Officer certified the Bill as within the Senedd's legislative competence before it was passed. The union's solicitors review the Government of Wales Act 2006 (as amended) and note that the Senedd has legislative competence in relation to the environment and agriculture in Wales, subject to certain exceptions. The solicitors identify that the Act includes a provision that purports to regulate the import of certain agricultural products into Wales from other parts of the United Kingdom. The union's president argues that this provision affects trade between the constituent nations of the UK and should therefore be a matter for the Westminster Parliament. The union has 8,000 members in Wales. The solicitors also note that a similar environmental regulation has been enacted by the Scottish Parliament for Scotland. The union's solicitors are considering whether to challenge the Act on the ground that it exceeds the Senedd's legislative competence. The Act received Royal Assent four months ago. The union wants to know on what basis the Act could be challenged. The union is particularly concerned about the provision relating to imports. The solicitors are reviewing the reserved matters under the Government of Wales Act 2006.

Which of the following best describes the basis on which the union could challenge the validity of the Senedd's Act?

Question 3

Scenario

A junior barrister is preparing a skeleton argument on a case involving the Northern Ireland Assembly. The case concerns the Assembly's power to legislate during a period of suspension. The barrister recalls that the Northern Ireland Assembly has been suspended on several occasions since its establishment in 1998. During the most recent suspension, the Northern Ireland Executive was not functioning and no Ministers were in office. The UK Government exercised certain powers during the suspension through the Northern Ireland (Executive Formation) Act and related legislation. A civil servant in Northern Ireland asks whether any legislation passed by the Assembly before the suspension remains in force during and after the suspension. The barrister also considers whether the Secretary of State for Northern Ireland can exercise powers that would normally be exercised by Northern Ireland Ministers during a period of suspension. The case involves a challenge to a decision made by the Secretary of State during the suspension period. The challenger argues that the decision should have been made by a Northern Ireland Minister. The Assembly has since been restored and a new Executive has been formed. The challenger is a community organisation in Derry that was affected by the Secretary of State's decision.

Which of the following correctly describes the effect of suspension on the Northern Ireland Assembly's legislative powers?

Want to test your SQE1 baseline?

Try 100 free SQE1 questions across FLK1 and FLK2, with instant feedback, full explanations and no login required.

Try 100 free SQE1 questionsTry demoView pricing

Related Topics

Practise Devolution In The Uk Constitution Questions for SQE1

Not sure where you stand for SQE1? Take ActusPrep's free 100-question SQE1 diagnostic test across FLK1 and FLK2, then use your results to focus your revision.