Public Law: SoP practise exam questions

“Overlaps between the Executive and Legislative branches in the UK Constitution cause more harm than good.”

Discuss.

The United Kingdom Constitutions is characterised by a “fusion of powers” rather than a strict separation. While this overlap is defended as the “efficient secret” of the British system, allowing for stable and decisive government, modern development suggests a shift towards an elective dictatorship. While these overlaps remain essential for administrative efficiency, they increasingly cause more harm than good by eroding legislative scrutiny and undermining judicial independence. This is demonstrated through the efficiency of the UK’s fused system, the growth of delegated legislation such as the Retained EU Law Act 20203 and the use of the safety of Rwanda Act 20204 to bypass judicial findings.

An argument in favour of the overlap between the Executive and Legislative branches is that it fosters a stable and efficient government that remains directly accountable to the electorate. This has been historically supported by Walter Bagehot who identified the “fusion” of powers as the “efficient secret” of the UK Constitution, in contrast to the rigid separation seen in the US system. This overlap ensures that the government with a democratic mandate can actually implement its manifesto. Due to the Cabinet sitting with Parliament they can guide the legislative process without the risk of “gridlock”. As a result, this creates ac Lear line of accountability as the public knows exactly who is responsible for policy success or failures. Unlike systems with a strict separation whether the executive and legislature can blame each other for inaction, the Uk’s overlap ensures that power is matched with responsibility. In turn, this allows for decisive action in times of national crisis or social change. For example, in March 2020 the UK faced an unprecedented health emergency. As the executive (government) leads the legislature (Parliament) they were able to draft and pass the Corona Virus Act 2020in just 4 days. A system like the US with strictly separate powers often take weeks or moths to negotiate such emergency legislation. This illustrates the “efficient secret” in practise. The overlap allowed the government to gain emergency powers - such as the ability to close businesses and restrict public gatherings - almost instantly. While the action was decisive the Act included the Sunset clauses (meaning the powers would expire unless renewed). This highlights that while the Executive can act fast, they remain responsible to Parliament, which must vote periodically to keep the powers alive. Therefore the fusion of power is good insofar as it provides the administrative sped and political clarity necessary for a modern democracy to function effectively.

The overlap does however cause significant constitutional harm when the executive utilises Its dominance to bypass parliamentary scrutiny through the use of the Henry VIII clauses. These clauses found in major legislation like the European Union (withdrawal) Act 2018 and the REUL Act 2023, grant Ministers the power to amend primary legislation with little to no debate in the House of Commons. While these powers are defended as “efficient” for dealing with complex legal changes, they critically undermine the separation of powers. From a constitutional perspective, the Legislature’s primary role is to scrutinise and pass law when the Executive grants itself the power to bypass this process, it risks creating an “elective dictatorship”. This shift in power reduces the legislative branch to a mere formality, as the Executive can effectively rewrite laws from within government departments rather than on the floor of the House. Consequently, this demonstrates that the overlap is harmful when it prioritises administrative convenience over the essential democratic check of legislative oversight.

Furthermore, the fusion of powers causes harm when the Executive uses its legislative majority to effectively overrule judicial decisions, undermining the principle of judicial independence. A primary example is the Safety of Rwanda (Asylum and Immigration) Act 2024, where Parliament legislated that Rwanda is a safe country despite a factual finding by the Supreme Court to the contrary. By using the overlap to pass an Act that deems a fact to be true, the Executive can use its control over the Legislature to “legally” ignore the Judiciary’s checks and balances, potentially leading to a breach of the Rule of Law. Usually the Judiciary decides the facts and the Legislature decides policy. When the Executive uses the Legislature to legislate a fact it is effectively blinding the courts. In doing so, this creates constitutional friction as the Executive is essentially eroding one of the Judiciary’s functions: to protect individuals from arbitrary state power. It suggests that the overlap is no longer about efficiency but about constitutional avoidance - using a parliamentary majority to make the government immune to legal challenge. Legislation like the Rwanda Act breaks the comity between Parliament and the courts. If the Executive can simply “write away” a court’s factual findings whenever it loses a case, the Judiciary ceased to be an independent check on power leading to a breakdown in the balance of the constitution. This illustrates that the overlap is harmful when it is used to settle political disputes by overriding the independent legal findings of the courts.

Overall the fusion of the executive and the legislative branches remain the defining characteristic of the UK Constitution. While the overlap provides the “efficient secret” necessary for both stable government, the balance has shifted dangerously to executive dominance. Even though the Corona Virus Act highlights the benefits of administrative speed, the increasing reliance on the Henry VIII clauses in the REUL Act 2023 and the legislative overriding of judicial fact-finding in the Rwanda Act 2024 represents a significant constitutional harm. Ultimately the good no longer outweighs the harm of an elective dictatorship that undermines both Parliamentary scrutiny and judicial independence. Without more formalised separation the UK’s flexible constitution risks becoming a took for Executive convenience rather than framework for democratic accountability.

“Overlaps between institutions entail that the UK Constitution does not correspond to a strict model of separation of powers. More importantly, these overlaps also preclude adequate promotion of the underlying rationales for separation powers.”

Discuss.

The UK Constitution does not follow a strict model of separation of powers, instead it utilises a system of functional overlaps and checks and balances. This essay will argue that the UK has developed a specific mechanism to ensure these rationales are upheld through the Executive and Legislature, the Judiciary and Constitutional Reform Act 2005 and the Judicial oversight in cases like R (Miller) v Prime Minister [2019].

The overlap between the Executive and the Legislature is central to the UK’s pursuit of two primary rationales: promoting efficiency and preventing tyranny. By drawing Ministers directly from Parliament - as regulated by the House of Commons Disqualification Act 1975 - the UK avoids the legislative gridlock found in strict separation models. This ensures the government can efficiently implement its mandate. In order to make sure this efficiency does not devolve into arbitrary rule, the system relies on the convention of Ministerial Responsibility. This requires the Executive to sit within the “cockpit” of Parliament to answer for its actions, theoretically preventing tyranny through constant political scrutiny. Thus the overlap is not a failure of the doctrine but a deliberate attempt to achieve a strong government that remains under the thumb of elected representatives. However the effectiveness of this balance is often compromised in practise. The emergence of an “elective dictatorship” (Lord Hailsham) suggests that when a government possesses a large majority, the “check” on power becomes purely nominal, favouring efficiency at the expense of preventing tyranny. Ins such cases the overlap does not preclude the rationales but it does make the prevention of arbitrary power heavily dependent on political culture rather than legal safeguards. Consequently while the overlap facilitates a highly effective state, it creates a constitutional vulnerability that requires independent judicial oversight to truly satisfy the rationale of restraint.

While the political branches remain fused, the UK has moved towards a “stricter” model regarding the judiciary to ensure the rationale of preventing tyranny is not compromised by institutional bias. Prior to the CRA 2005 significant overlaps existed: the LC sat in all threes branches, and the “Law Lords” functioned as the highest court within the Legislature. This lack of separation was criticised for creating a “perception of bias” as seen in the case of R v Bow Street Metropolitan Stipendiary Magistrate, where judicial neutrality was scrutinised. By creating an index dent SC and stripping the LC of his judicial functions, the CRA 2005 effectively decoupled the Judiciary from the Executive and Legislature. This formal separation promotes efficacy by allowing a dedicated court to manage its own administration and ensures that the rationale of preventing tyranny is upheld through a neutral arbiter. However, formal institutional separation does not entirely eliminate the risk of executive encroachment. Despite the CRA 2005, the Executive still plays a role in the judicial appointments through the LC’s power to veto over the Judicial Appointments Commission (JAC) recommendations. While the overlap has been significantly reduced, this residual link suggests that the “strict model” remains elusive. Nevertheless, the CRA 2005 demonstrates that the UK Constituion can reform overlaps when they clearly preclude the promotion of the rule of law, proving that the system is capable of evolving to protect its core rationales.

The final safeguard for preventing tyranny while maintaining efficient is Judicial Review. Although the Executive is fused with the Legislature, the Judiciary acts as a “constituional watchdog” to ensure this overlap doe snot result in arbitrary rule. This was demonstrates in R (Miller) v Prime Minister [2019] (Miller II) whether the Sc ruled the prorogation of Parliament unlawful because it frustrated the Legislature’s constitutional role. By intervening, the Court proved that the Executive’s drive for efficiency cannot override the rationale of restraint. This ensures that even in a “weak”separation of powers model, the executive remains subject to the law. However, such judicial assertiveness creates a new tension. Critics argue that when the Judiciary intervenes in high-level political matters, it risks undermining the efficiency of the democratic process and violates its own institutional boundaries. This highlights the central paradox of the UK system: the overlaps do not preclude the rationales but they necessitate a constant, friction-filled balancing act between the efficiency of the government and the legality enforced by the courts.

In conclusion, while the UK Constituion clearly does not correspond to a “strict” model of separation of powers, the overlaps between the institutions do not preclude the promotion of its underlying rationales. As shown, the fusion of the Executive and Legislature prioritises efficient and political accountability over formal isolation. Conversely, the CRA 2005 and the SC’s ruling in Miller II demonstrate that where overlaps threaten to facilitate tyranny, the law has intervened to reinforce institutional boundaries. Ultimately the UK system proves that a “pure” separation is not the only way to protect liberty, rather a flexible system of checks and balances can effectively balance the need for an efficient government with the absolute necessity of the rule of law.

Devolution Scotland Acts Q

Introduction:

• Sovereignty vs Reality

• Dicey’s theory that Westminster can make/unmake any law.

• Statutory tensions:

  • Contrast s.28(7) that Westminster remains supreme with s.28 (8) the Sewel convention and s.63A (permanence).

• There is a gap between legal power (unlimited) and political reality (highly constrained).

Paragraph 1: Sewel Convention s.28(8)

• UK Parliament is politically constrained by the requirement for consent.

• Evidence: s.28(8) states Westminster will “not normally” legislate on devolved matters without a Legislative Consent Motion (LCM).

• Explanation: This turns political convention into a statutory recognition. It creates a constitutional expectation that Westminster stays out of Scottish/Welsh business.

• Link: Reference Miller I [2017]. The SC ruled that despite the Act, Sewel is still a political convention, not a legal rule. Therefore constraint is purely political.

Paragraph 2:

• Point: Legislation attempts to bind the future of the UK’s structure.

• Evidence: s.63A declares the Scottish Parliament/Government “permanent” and requires a referendum for abolition.

• Explanation: This is a direct challenge to the rule that “no Parliament can bind its successor”

• Link: Legally, a future Parliament could simply repeal s.63A with a 51% majority. However, the political cost of doing so without a referendum would be a constitutional crisis, making it a “de facto” entrenchment.

Paragraph 3:

Point: The law explicitly preserves Westminster’s supremacy.

Evidence: s.28(7) says the Act “does not affect the power of the Parliament to make laws for Scotland”.

Explanation: This is the safety valve. It ensures that in emergencies or for UK wide issues (like Brexit or Internal Markets), Westminster can bypass Holyrood.

Link: This proves that the legal constraint is non-existent Westminster has used this power (e.g. UK Internal Market 2020) even when consent was refused, showing the political constraints only work when the UK government chooses to respect them.

Point (P): The evolution of Welsh devolution demonstrates the increasing "formality" of political constraints, even where legal sovereignty is preserved.

• Evidence (E): The Wales Act 2017 inserted Section A1 into GOWA 2006, mirroring Scotland’s "permanence" clause, and Section 107(6), which statutory-recognizes the Sewel Convention for Wales.

• Explanation (E): Originally, Wales had a "conferred powers" model (only doing what Westminster allowed). By moving to a "reserved powers" model in 2017 (doing everything unless Westminster forbids it), the UK Parliament effectively signaled a deeper political commitment to Welsh autonomy.

• Link/Critical Analysis (L): However, the "extent" of this constraint was tested in the Reference by the Attorney General regarding the UK Internal Market Act 2020. Despite Welsh Senedd objections, the UK government proceeded, proving that while the political pressure is high, the legal path for Westminster to override Wales remains wide open under the principle of Parliamentary Sovereignty.

Conclusion:

Legal extent: almost zero. Sovereignty is preserved by s.28(7) and confirmed by the courts in Miller I

Political extent: Massive, The permanence and consent clauses make unilateral action by Westminster politically unthinkable in normal times.

Final verdict: The provisions impose formidable political barriers but fail to impose a binding legal straightjacket on the UK Parliament.

If it chooses to do so the UK Parliament could legislate on devolved matters, amend the constitutional structure of devolution, or even abolish devolution - all without the consent of the devolved legislatures or the people of the devolved nations.

Discuss.

The doctrine of Parliamentary Sovereignty dictates that the UK Parliament remains the supreme legal authority, possessing the unilateral power to “make or unmake any law.” Within this traditional framework, the devolved institutions of Scotland, Wales and Northern Ireland are statutorily creations rather than sovereign bodies, existing only by the grace of Westminster’s legislative will. Legally (de jure) the UK remains a unitary state where no Parliament can bind its successors, rendering the structure of devolution vulnerable to amendment or total abolition by a simple majority. Yet, this absolute sits in direct tension with the political reality (de facto) of a modern, “quasi-federal” United Kingdom. The democratic mandate established by referendums and the constitutional weight of the Sewel Convention have created a system where exercising such supreme power without consent would trigger a fundamental constitutional crisis. While the legal path to reclaiming devolved powers remains open, the political path is effectively blocked by the contemporary requirement for multi-national stability.

From a strictly legal perspective, the UK Parliament retains the absolute power to legislate on devolved matters or even abolish devolved institutions entirely, as it cannot be legally bound by its predecessors. This was explicitly confirmed by the Supreme Court in R (Miller) v Secretary of State for Exiting the European Union 2017. Although section 2 of the Scotland Act 2016 (and the Wales act 2017) states that the devolved administrations are “permanent”, the Court ruled that these provisions are purely political declarations. Furthermore, the Scotland Act 1998, section 28 (7) expressly preserves the right of the UK Parliament to make laws for Scotland, ensuring the sovereignty is not “transferred” but merely “delegated”. This evidence proves that the “permanence” of devolution is a legal misnomer. Because of the principle of implied repeal and the rule that one Parliament cannot bind another, any statute can be overturned by an Act. The Court in Miller clarified that the Sewel Convention, even when recognised in statue, remains a convention and not a legal rule that judges can enforce to strike down Westminster legislation. Consequently, the prompt is legally accurate; without a codified constitution to entrench these powers, the devolved nations remain subordinate to the legislative supremacy of the Westminster Parliament.

The exercise of Westminsters sovereignty is heavily constrained by the Sewel convention, which establishes that the UK Parliament will “not normally” legislate on devolved maters without a Legislative Consent Motion (LCM). While section 28(8) of the Scotland Act 1998 gave this convention statutory recognition, the Supreme Court in Miller I famously described it as a political rather than legal constraint. This was further tested by the United Kingdom Internal Market Act 2020, which was passed despite the Scottish Parliament and the Senedd explicitly withholding consent. Furthermore, the Continuity Bill (Scotland) case 2018 demonstrated that while devolved legislatures can attempt to protect their powers, Westminster’s legislation will ultimately prevail in cases of direct conflict due to the UK Parliamentary sovereignty clause in the Scotland Act. The refusal to grant an LCM for the internal Market Act shows that the prompt, it would ignore the democratic legitimacy provided by the 1997 devolution referendum. In the UK constitutional law, a referendum is often seen as providing a “moral entrenchment” that a simple Act of Parliament lacks the political authority to undo unilaterally. Therefore, while the “consent” of devolved nations is not a legal requirement for Westminster to act, it has become a political necessity; ignoring it undermines the stability of the Union and moves the UK closer to a constitutional breaking point.

The claim that Parliament could “abolish devolution” unilaterally ignores the unique legal and international framework gpvernmening Northern Ireland,w chin places a higher burden on Westminster than the Scottish or Welsh models. Devolution in Northern Ireland is underpinned by the British-Irish Agreement, an international restart, and the Nortehrn Ireland Act 1998, which was born out of the Belfast (Good Friday) Agreement. Unlike the Scottish model, the Northern Irish Act includes specific “cross-community” requirements and a mechanism for a “border poll” under Section 1. Furthermore, the Northern Ireland Protocol (now the Windsor Framework) demonstrates now Westminster’s legislative power is restricted by international obligations to the EU, as highlighted in Ross v Secretary of State for Northern Ireland 2020, regarding limits of executive power in the absence of a functioning Assmebly. If UK parliament were to abolish devolution in Northern Ireland without consent it would not only be a domestic legislative act but a breach of an international peace treaty. This creates a legal paradox: while the doctrine of Parliamentary Sovereignty suggests that domestic statutes prevail over international law, the practical consequences fo such a breach- ranging from diplomatic sanctions to renewed civil unrest- function as a “hard” limit on Westminster’s powers. This suggests that the “constitutional structure” mentioned in the prompt is far more entrenched in Belfast than it is in Edinburgh or Cardiff.

Legally, the prompt is correct: under Parliamentary Sovereignty, no mechanism prevents Westminster from reclaiming devolved powers. However, this narrow view ignores the constitutional reality. The democratic legitimacy of devolved nations and the international weight of the Belfast Agreement have made devolution a permanent feature in all but name. Parliament could technically abolish it, but doing so would likely trigger a total collapse of the United Kingdom’s political structure.