The European Union and UK Government | Edexcel A-Level Politics
Updated: 2 days ago
For Specification 9PL0
Edexcel A-Level Politics | Free Revision Notes
Estimated study time:Â 70 minutes
The European Union and UK government A-Level Politics revision examines the aims of the European Union (EU), including the four freedoms of the single market and the development of political and economic union. You also need to assess how fully these aims have been achieved and, crucially, understand how leaving the EU affected UK parliamentary sovereignty and policy making. This topic brings together your understanding of parliamentary sovereignty [The nature and sources of the UK Constitution] with the wider debate about legal and political sovereignty [Legal and political sovereignty].
Learning Objectives 🎯
By the end of this revision page, you should be able to:
Define the European Union and explain its political and economic character.
Explain the four freedoms of the EU single market.
Explain the aims of political and economic union.
Assess the extent to which the EU's aims have been achieved.
Explain how EU membership affected UK parliamentary sovereignty and policy making.
Analyse how leaving the EU changed parliamentary sovereignty in relation to policy making.
Revision Notes đź“š
What is the European Union?
The European Union (EU)Â is defined in the Edexcel specification as a political and economic union of a group of European countries.
This definition is important because the EU is more than a simple trading arrangement.
It involves both:
economic integration, through arrangements such as the single market
political co-operation, through shared decision making between member states
The specification requires you to understand the EU through three central aims:
the four freedoms of the single market
economic union
political union
You must also consider how far these aims have actually been achieved.
The EU single market
One of the EU's central economic aims is the creation of a single market.
The purpose of a single market is to reduce barriers to economic activity between EU member states.
Rather than treating each member state as an entirely separate national market, the EU seeks to make economic activity across participating states easier.
At the heart of this system are the four freedoms.
The four freedoms
The Edexcel specification defines the four freedoms as the principle of free movement of:
goods
services
capital
people
within the EU's single market.
These four freedoms are closely connected.
Freedom | Meaning | Purpose within the single market |
Goods | Goods can move between member states within the single market. | Encourages trade across national borders. |
Services | Services can be provided across member-state borders. | Creates a wider market for businesses and consumers. |
Capital | Money and investment can move between member states. | Enables investment and economic activity across the EU. |
People | People can move between member states under the principles of the single market. | Allows mobility within the integrated European market. |
The four freedoms are therefore not four unrelated policies. Together, they form the basis of the EU's attempt to create an integrated European economic area.
Why are the four freedoms politically important?
The four freedoms have consequences beyond economics.
Member states participating in the single market must accept common conditions associated with it.
Edexcel's 2019 mark scheme identifies this as an important issue in the debate about sovereignty. Member states were expected to enable the free movement of goods, capital, services and people, and the question of free movement became particularly politically significant in the UK's 2016 EU referendum.
This creates a key political tension:
Economic integration can increase opportunities for states to trade and co-operate, but accepting common rules can restrict the freedom of an individual state to make policy entirely independently.
That tension is at the centre of the relationship between EU membership and sovereignty.
How far have the four freedoms been achieved?
The four freedoms represent one of the clearest examples of successful European integration.
EU members participating in the single market accept the principle that goods, services, capital and people should be able to move across the market.
This means the EU has gone much further than an organisation in which states merely agree to co-operate occasionally.
Instead, economic integration affects the rules under which member states operate.
Evidence that the aim has been achieved
The four freedoms became established conditions of participation in the single market.
During UK membership:
the UK participated in the single market arrangements
free movement formed part of the rules applying to participating member states
UK policy making in relevant areas operated within EU requirements
This demonstrates substantial achievement of the EU's single-market aim.
Why achievement is not necessarily complete
Economic integration does not mean that member states have ceased to exist as independent political states.
States still retain important areas of national decision making.
The extent of integration can also differ between different areas of European co-operation.
The EU's economic aims should therefore be described as substantially achieved through the single market, rather than as the complete elimination of national economic autonomy.
Economic union
What does economic union mean?
Economic union involves states integrating significant parts of their economies rather than operating only as separate national markets.
The single market is therefore a central part of economic union.
Economic integration involves states accepting common arrangements so that economic activity can cross borders more easily.
The specification specifically requires students to understand the EU as both an economic and political union, while the wider Edexcel specification also identifies economic and monetary union as an important feature of European integration.
The relationship between the single market and economic union
The logic can be understood as:
Separate national economies → removal of barriers → four freedoms → greater economic integration → economic union
The more states agree to common rules and economic arrangements, the deeper the level of economic union becomes.
How far has economic union been achieved?
There is strong evidence that economic union has been achieved to a significant extent.
The single market requires participating member states to accept common conditions and the four freedoms.
However, economic integration has not meant complete uniformity.
Edexcel's 2019 material notes that the UK had secured an opt-out from joining the euro while it was an EU member.
This is significant for evaluation.
If economic union had been completely uniform, every member state would have participated in every aspect of economic and monetary integration in exactly the same way.
The UK's former position demonstrates that:
economic integration could be extensive
states could nevertheless retain important national choices
the extent of integration was not identical in every area
A good overall judgement is therefore:
The EU has achieved a high degree of economic union through the single market and four freedoms, but economic integration has not eliminated all national differences or autonomy.
Political union
What does political union mean?
The EU also has a political dimension.
Political union means that European states co-operate and make some decisions collectively rather than treating every political issue as solely a matter for individual national governments.
This is closely linked to sovereignty.
Where decisions are made collectively, an individual member state may not always possess complete freedom to determine the outcome by itself.
This can be understood as the pooling of sovereignty.
Instead of each state exercising all decision-making power independently, member states accept common decision-making arrangements in return for participating in a wider union.
Collective decision making and political union
During UK membership, not every EU decision required every member state individually to approve it.
Edexcel's 2019 mark scheme identifies qualified majority voting (QMV)Â as one example.
In areas where QMV applied:
decisions could be made without every individual member state possessing a veto
the UK could therefore be affected by a decision even if it did not independently determine that decision
This is evidence of political integration because national governments had accepted collective decision-making arrangements.
The implication for sovereignty was significant.
If a state cannot independently veto every decision, then its freedom to act entirely alone has been reduced in those areas.
Has political union been achieved?
Political union has been achieved to a significant but incomplete extent.
Evidence of political union
Member states have accepted:
common decision-making processes
obligations associated with EU membership
areas in which decisions are made collectively
limits on purely national decision making
This goes beyond ordinary co-operation between completely separate states.
Evidence that political union remains incomplete
Edexcel's mark schemes also emphasise that member states retained sovereignty in important areas.
The UK, for example, retained:
vetoes in some areas
opt-outs from some European arrangements
the ultimate ability to withdraw from the EU
The UK had also remained outside the Schengen area and had an opt-out from joining the euro.
These arrangements demonstrate that EU membership did not amount to the complete replacement of national governments by a single European government.
Political union should therefore not be confused with the disappearance of the member state.
Assessing how far the EU's aims have been achieved
A useful way of approaching evaluation is to compare the different aims directly.
EU aim | Evidence of achievement | Limits to achievement |
Free movement of goods | Established as one of the four freedoms of the single market. | Member states still exist as separate political states. |
Free movement of services | Integrated into the single-market principle. | Participation in economic integration does not remove all national policy making. |
Free movement of capital | Forms part of an integrated European economic market. | Economic integration is not identical across every aspect of the EU. |
Free movement of people | Established as a core single-market freedom. | Became politically contested in the UK and was important during the 2016 referendum debate. |
Economic union | Single market and common economic arrangements create extensive integration. | Former UK opt-out from the euro shows incomplete uniformity. |
Political union | Collective decision making and pooling of sovereignty. | National vetoes, opt-outs and the ability to leave demonstrate continuing state sovereignty. |
The strongest judgement is not that the EU has either completely succeeded or completely failed.
Instead:
The EU achieved deep economic and political integration, particularly through the single market, but integration remained incomplete because member states retained important elements of sovereignty and did not participate identically in every aspect of union.
The EU and UK parliamentary sovereignty before Brexit
Understanding the impact of leaving the EU requires you first to understand how EU membership affected parliamentary sovereignty.
Parliamentary sovereignty means Parliament has the legal authority to make or unmake laws.
This links directly to the constitutional principle of parliamentary sovereignty [The nature and sources of the UK Constitution].
EU membership complicated this principle.
The central question was whether Parliament remained sovereign if EU rules could take priority in areas covered by EU obligations.
EU law and UK law
Edexcel's 2019 mark scheme identified the precedence of EU law over UK law in relevant areas as a significant constraint on parliamentary sovereignty during membership.
This meant that UK policy making could not always be considered completely independently from EU obligations.
A useful analytical chain is:
EU membership → acceptance of EU obligations → restrictions on independent UK policy making in relevant areas → practical constraint on Parliament's sovereignty
This did not necessarily mean that Parliament had permanently lost sovereignty.
The alternative argument was that Parliament had chosen to accept these arrangements and retained the legal ability to withdraw from them.
The Factortame case
A major example used in Edexcel mark schemes is the Factortame case.
Edexcel identifies the case as demonstrating that EU law could take priority over UK law in an area involving fishing rights.
The constitutional importance was considerable.
If an Act passed by Parliament could not operate as Parliament originally intended because of the requirements of EU law, then EU membership appeared to place a practical restriction on parliamentary sovereignty.
This supported the argument that sovereignty had been constrained.
However, the restriction resulted from the UK's membership of the EU.
Parliament ultimately retained the ability to end that membership and alter the domestic legal arrangements supporting it.
This distinction between legal sovereignty and the practical exercise of sovereignty becomes central to your next topic, legal versus political power [Legal and political sovereignty].
The European Court of Justice
While the UK was an EU member, relevant decisions of the European Court of Justice (ECJ)Â formed another constraint on complete national policy autonomy.
Edexcel's 2019 mark scheme states that UK institutions had to abide by ECJ decisions within the scope of EU obligations.
For sovereignty, the important point is not simply that a European court existed.
The analytical issue is that:
UK Parliament → accepted EU membership → EU legal obligations applied → ECJ decisions could constrain UK policy within those obligations
This reduced Parliament's practical freedom in areas affected by EU rules.
Qualified majority voting
Qualified majority voting also affected the sovereignty debate.
If every decision required unanimous agreement, the UK could prevent any proposal it opposed.
Where QMV applied, that was not always possible.
An EU decision could therefore become binding through collective decision making even where an individual member state did not have a veto.
This provides evidence that aspects of political sovereignty were pooled.
However, Edexcel material also notes that the UK retained vetoes in important areas.
This creates a balanced judgement:
EU membership constrained unilateral UK policy making, but it did not remove every form of national control.
Did EU membership destroy parliamentary sovereignty?
There are two interpretations.
Argument 1: EU membership undermined sovereignty
EU membership restricted Parliament because:
EU law took precedence in relevant areas
collective decision making meant the UK did not always possess a veto
participation in the single market required acceptance of the four freedoms
relevant ECJ decisions applied to the UK
This meant Parliament could not always make policy exactly as it wished while remaining within the EU framework.
From this perspective, legal and political power had shifted away from Westminster.
Argument 2: sovereignty was pooled, not lost
The alternative argument is that Parliament voluntarily accepted the constraints of membership.
Edexcel's mark scheme identifies several arguments supporting this view:
the UK retained veto powers in some important areas
the UK had important opt-outs
sovereignty could be described as pooled
Parliament retained the ability to withdraw from the EU.
Pooling sovereignty may even give states more collective influence.
The argument is that a state sacrifices some freedom to act entirely alone but gains influence over decisions applying across a much larger group of countries.
The constitutional significance of Brexit is that the UK's ability to leave demonstrated that membership was not legally irreversible.
The 2016 EU referendum
The 2016 referendum is crucial to the relationship between popular and parliamentary sovereignty.
The public voted to leave the European Union.
This provides an important link to the use and consequences of referendums [Referendums and how they are used].
The referendum created enormous political pressure for Parliament to implement the decision.
However, the distinction between legal and political sovereignty remains important.
Parliamentary legislation was required to implement the UK's departure.
This demonstrates two different forms of sovereignty operating simultaneously:
popular political sovereignty, because the referendum result carried powerful democratic authority
parliamentary legal sovereignty, because legal changes still required Parliament
This tension is central to understanding Brexit.
Leaving the EU and parliamentary sovereignty
The current Edexcel specification specifically requires students to understand the impact of leaving the EU on UK parliamentary sovereignty in relation to policy making.
This is important because the specification was revised following Brexit. The previous focus on aspects of EU influence was replaced with an explicit requirement to consider the consequences of leaving.
The EU Withdrawal Act and legal sovereignty
The EU Withdrawal Act is an important example of Parliament exercising its legal sovereignty.
Edexcel's 2024 mark scheme uses the legislation as evidence that Parliament's legal sovereignty remained fundamental, because Parliament was able to legislate to end the previous legal arrangements governing EU membership.
This illustrates one of the classic features of parliamentary sovereignty:
One Parliament cannot permanently prevent a future Parliament from changing the law.
The UK had accepted legal constraints associated with EU membership.
Parliament could subsequently legislate to remove those constraints.
Brexit therefore provides strong evidence that Parliament had retained ultimate legal sovereignty.
How leaving the EU increased parliamentary sovereignty
1. Parliament was no longer constrained by EU membership in the same way
Before leaving, UK policy making in areas covered by EU obligations operated within EU rules.
Leaving the EU removed that general membership relationship.
Parliament gained greater freedom to legislate independently in areas where EU rules had previously constrained UK policy.
The key change can be represented as:
During membership: UK policy making + EU membership obligations
After leaving: Greater domestic control over policy making
This strengthened Parliament's formal legal authority.
2. EU law no longer possessed the same constitutional position
The sovereignty debate before Brexit centred partly on the fact that EU requirements could take precedence in relevant policy areas.
Withdrawal altered that relationship.
The UK Parliament had demonstrated its ability to legislate to change the legal basis on which those constraints operated.
This is strong evidence that legal sovereignty ultimately remained with Parliament.
3. UK participation in EU collective decision making ended
EU political integration involved collective decisions in which an individual country did not always possess a veto.
Leaving removed the UK from that position as an EU member.
UK policy no longer had to be determined through EU membership's general system of collective decision making.
This increased national autonomy over policy.
4. The UK was no longer required to participate in the four freedoms as an EU member
The four freedoms were core conditions of the single market.
Their importance during the referendum demonstrates that they could restrict the UK's ability to make policy independently while remaining within the single-market structure.
Leaving therefore increased the UK Parliament's freedom to determine policy outside those membership requirements.
Did Brexit give sovereignty simply to Parliament?
This requires careful evaluation.
Leaving the EU increased the legal sovereignty of Parliament in relation to EU membership, but that does not necessarily mean Parliament exercises unlimited political sovereignty in practice.
This is why your next lesson on the difference between theoretical and practical sovereignty [Legal and political sovereignty] is so important.
Parliament versus the Executive
Powers returning from EU institutions do not automatically mean that Parliament itself exercises all of them independently.
The government remains highly influential in policy making and often controls the parliamentary agenda.
A government with a secure majority can dominate Parliament.
Therefore:
Power returning to the UK ≠power necessarily returning directly to backbench MPs or Parliament as an independent institution.
Some practical political power may instead be exercised by the Executive.
This links directly to your understanding of executive dominance of Parliament [The Executive and Parliament].
Brexit itself demonstrated Parliament's continuing importance
The Brexit process also showed that the Executive could not simply alter the law without Parliament.
The 2024 Edexcel mark scheme refers to Theresa May's difficulties securing parliamentary approval for Brexit legislation as evidence that the Executive ultimately relies on Parliament to make law.
This provides an important distinction:
the government negotiates and develops policy
Parliament possesses the legal authority required to make or change law
When the government's parliamentary position is weak, Parliament's legal sovereignty may become particularly visible in practice.
Devolution and powers returning from the EU
Leaving the EU also interacted with devolution.
Political disputes developed over where powers previously exercised at EU level should sit when they returned to the UK.
Edexcel's 2023 mark scheme identifies disagreement over where powers coming back from the EU belong as part of the wider constitutional tension between Westminster and the devolved administrations.
This links the EU topic with the distribution of power across the UKÂ [Devolution].
The important sovereignty issue is that:
leaving the EU increased UK-level legal autonomy, but it also raised questions about how that autonomy should be distributed within the United Kingdom.
This makes the consequences of Brexit more complicated than a simple transfer of power from Brussels to Westminster.
Northern Ireland and continuing EU influence
Leaving the EU did not mean that every practical connection between EU rules and the UK immediately disappeared in exactly the same way across the whole country.
The 2024 examiner report specifically praised candidates who used the ongoing impact of the EU Single Market in Northern Ireland as contemporary evidence when discussing sovereignty.
This is an important evaluation point.
It shows that:
Brexit strengthened Parliament's general legal sovereignty in relation to EU membership
practical arrangements can still mean EU-related rules matter in particular contexts
sovereignty in practice can therefore be more complicated than sovereignty in legal theory
This is precisely why Edexcel distinguishes between legal and political sovereignty.
Legal sovereignty versus political sovereignty after Brexit
The distinction can be summarised clearly.
Legal sovereignty
Legal sovereignty concerns the legal right to exercise sovereign power.
After Brexit, Parliament demonstrated its legal sovereignty by changing the legal relationship between the UK and EU.
Edexcel defines legal sovereignty as sovereignty in theory.
Political sovereignty
Political sovereignty concerns the practical ability to exercise power.
Edexcel defines this as sovereignty in practice.
Even after leaving the EU, Parliament can still face political constraints from:
the Executive
devolved institutions
referendum mandates
practical international relationships
political commitments
Brexit therefore strengthened Parliament's formal autonomy without making Parliament politically unconstrained.
Before and after leaving the EU
During EU membership | After leaving the EU |
EU obligations affected UK policy making in relevant areas. | Parliament has greater freedom to make policy outside EU membership requirements. |
EU law could take precedence in relevant areas. | Parliament demonstrated its ability to change the UK's legal relationship with EU law. |
The four freedoms applied as conditions of participation in the single market. | Parliament has greater freedom to determine UK policy outside those membership conditions. |
Some decisions were made collectively through EU institutions. | UK policy is no longer made through the EU's general membership decision-making system. |
ECJ decisions applied within the scope of EU membership. | The previous general membership relationship with the ECJ has ended. |
Sovereignty was often described as pooled. | Formal legal sovereignty is more clearly exercised domestically. |
UK influence was partly exercised through collective EU decision making. | Greater national autonomy is balanced against losing that form of collective decision-making influence. |
The important examination point is not simply to state that Brexit "gave sovereignty back".
You need to explain what changed in policy making.
Did Brexit restore parliamentary sovereignty?
Arguments that sovereignty was restored or strengthened
Parliament demonstrated that it could withdraw from the EU
This is perhaps the strongest argument for continuing parliamentary legal sovereignty.
If Parliament could legislate to end EU membership, the sovereignty transferred or pooled through membership had not been permanently surrendered.
Greater policy-making autonomy
EU membership had required the UK to operate within common rules in important areas.
Leaving increased the freedom of UK institutions to determine policy outside those requirements.
EU legal supremacy no longer applied in the same way
The constitutional relationship in which EU law could take priority in relevant areas was fundamentally changed by withdrawal.
The EU Withdrawal Act demonstrated parliamentary authority
Parliament itself passed the legislation necessary to change the UK's legal relationship with the EU.
This demonstrates the principle that Parliament can make or unmake law.
Arguments that the impact should not be exaggerated
Parliament was legally sovereign even during membership
One interpretation is that Parliament had always retained ultimate legal sovereignty because membership itself was based on legislation that Parliament could change.
Brexit therefore demonstrated parliamentary sovereignty rather than creating it for the first time.
Political power may lie with the Executive
Returning policy-making authority to the UK does not necessarily strengthen Parliament relative to government.
Where the Executive dominates the Commons, ministers may exercise much of the practical political power.
Devolution creates further complications
Questions concerning powers returning from the EU can generate disputes between Westminster and devolved institutions.
Practical EU-related constraints have not disappeared everywhere
The continuing importance of the EU Single Market in Northern Ireland demonstrates that post-Brexit sovereignty is not simply a matter of complete policy separation.
Has Brexit increased legal or political sovereignty more?
The strongest case is that Brexit produced a particularly clear increase in formal legal autonomy from the EU.
Parliament can make policy without being subject to the general obligations of EU membership.
However, political sovereignty is more complicated.
The existence of legal power does not guarantee that Parliament as an institution exercises that power independently.
The Executive may dominate Parliament.
Referendum results can create powerful democratic pressure.
Devolution may limit what Westminster can realistically do.
International commitments can also shape policy choices.
This means the claim:
"Brexit made Parliament completely sovereign again"
is too simplistic.
A better judgement is:
Brexit made the UK's legal autonomy from EU institutions substantially clearer, but Parliament continues to operate within significant political constraints.
The EU, Brexit and the location of sovereignty
This topic leads directly into where sovereignty ultimately lies in the UKÂ [The location of sovereignty in the UK].
The EU debate demonstrates why sovereignty is difficult to locate using only one definition.
During EU membership:
Parliament retained the legal ability to withdraw
but EU membership constrained policy making in practice
After Brexit:
Parliament has greater formal autonomy from the EU
but political power remains distributed among Parliament, the Executive, devolved institutions and the electorate
The most sophisticated judgement is therefore:
EU membership pooled and constrained the practical exercise of parliamentary sovereignty without permanently removing Parliament's underlying legal sovereignty. Leaving the EU substantially increased domestic policy-making autonomy and demonstrated Parliament's legal sovereignty, but did not give Parliament unlimited political power in practice.
Overall assessment
The EU has achieved a substantial level of both economic and political integration.
The single market and its four freedoms are particularly strong evidence of economic integration. Collective decision making also demonstrates significant political union.
However, neither economic nor political union has been complete. National governments retained important powers, vetoes and, in the UK's case while it was a member, significant opt-outs. The UK's eventual withdrawal itself demonstrated that EU integration had not permanently eliminated national sovereignty.
For the UK, leaving the EU changed the sovereignty debate fundamentally.
While membership had constrained Parliament's freedom to legislate independently in areas governed by EU obligations, withdrawal increased domestic legal autonomy. Parliament's ability to legislate for withdrawal also demonstrated that it had retained ultimate legal sovereignty.
The most convincing overall conclusion is therefore:
Leaving the EU strengthened Parliament's formal sovereignty over policy making, but the practical exercise of sovereignty remains constrained by domestic political institutions, devolution, the Executive and continuing political relationships.
Key Words 🔑
Key word | Student-friendly definition | How it may be used in an exam |
European Union (EU) | A political and economic union of a group of European countries. | Use when explaining the EU's aims and its impact on UK government and sovereignty. |
Four freedoms | The principle of free movement of goods, services, capital and people within the EU single market. | Use when explaining the aims and operation of economic integration and the sovereignty implications of single-market membership. |
Parliamentary sovereignty | The principle that Parliament possesses the legal authority to make or unmake law. | Use when assessing how EU membership and Brexit affected UK policy making. |
Legal sovereignty | The legal right to exercise sovereignty, meaning sovereignty in theory. | Use to explain why Parliament retained the legal ability to legislate for withdrawal from the EU. |
Political sovereignty | The practical ability to exercise sovereign power. | Use to assess whether Parliament actually exercises all the power that it possesses legally. |
Hints from the Examiner Reports đź’ˇ
Examiner hint:Â Keep sovereignty at the centre of your argument. The 2024 examiner report praised stronger candidates who began by defining sovereignty accurately and then maintained a clear line of argument about where it lay. Students who struggled to define sovereignty found it much harder to analyse the European dimension effectively.
Examiner hint:Â Use contemporary evidence as well as historical examples. The 2024 report warned that some responses discussing Europe became too historical. Stronger answers used examples such as Northern Ireland and the continuing impact of the EU Single Market to demonstrate the present-day significance of the issue.
Examiner hint:Â Do not confuse the European Court of Justice with the European Court of Human Rights. The 2024 examiner report specifically identified this as an area of confusion. When discussing EU membership and EU law, make sure you identify the ECJ correctly.
Examiner hint:Â Do not simply state that Brexit "restored sovereignty". Explain the mechanism. Strong analysis identifies what constrained policy making during membership and then explains how withdrawal altered those constraints.
Examiner hint:Â Distinguish the Executive from Parliament. Examiner reports repeatedly identify confusion between the two as a weakness. Powers exercised by the UK government after Brexit are not automatically evidence that Parliament itself has become politically stronger.
Examiner hint:Â Build a balanced sovereignty argument. Edexcel's earlier EU mark scheme rewarded both the argument that EU law, QMV, the single market and ECJ jurisdiction constrained Parliament and the counterargument that sovereignty was pooled, opt-outs existed and Parliament retained the ability to leave.
Examiner hint: Your conclusion should distinguish legal sovereignty from political sovereignty. This allows you to avoid an oversimplified "sovereign/not sovereign" answer and make a much more precise judgement.
Common Mistakes ⚠️
Mistake: Forgetting one of the four freedoms
Why this is incorrect: The specification explicitly requires knowledge of all four.
How to improve: Remember:
Goods, services, capital, people.
Learn them as one complete set rather than four isolated facts.
Mistake: Treating the EU as only an economic organisation
Why this is incorrect: Edexcel defines the EU as both a political and economic union.
How to improve:
Organise your revision into:
single market and four freedoms
economic union
political union
Then evaluate how far each has been achieved.
Mistake: Claiming European political union is complete
Why this is incorrect: Member states have retained significant national powers. The UK's former opt-outs, vetoes and ultimate withdrawal demonstrate limits to integration.
How to improve: Use the judgement:
significant integration, but incomplete political union.
Mistake: Saying Parliament had no sovereignty while the UK was in the EU
Why this is incorrect: EU membership constrained Parliament in important policy areas, but Parliament ultimately retained the legal ability to legislate for withdrawal.
How to improve: Distinguish between:
constraints on exercising sovereignty and complete loss of legal sovereignty.
Mistake: Saying Brexit created parliamentary sovereignty for the first time
Why this is incorrect: The fact that Parliament could legislate to change the UK's EU relationship is itself evidence that Parliament retained underlying legal sovereignty.
How to improve: Say Brexit strengthened or demonstrated parliamentary legal sovereignty rather than assuming Parliament previously had none.
Mistake: Assuming power returning from the EU automatically strengthened Parliament against the Executive
Why this is incorrect: The UK government may exercise much of the practical policy-making power, especially where it dominates the House of Commons.
How to improve: Always ask:
Did power return to the UK, or did power specifically return to Parliament as an independent institution?
These are not necessarily the same thing.
Mistake: Confusing the ECJ with the European Court of Human Rights
Why this is incorrect: The ECJ is the relevant institution when discussing the legal obligations arising from EU membership.
How to improve: Associate EU law = ECJÂ when revising this topic.
Mistake: Using only pre-Brexit examples
Why this is incorrect: The current specification specifically requires the impact of leaving the EU.
How to improve: Structure answers around:
before Brexit → change caused by leaving → continuing limits or complications.
Exam-Style Questions ✍️
Question 1
State the four freedoms of the European Union single market. (4 marks)
Answer:
free movement of goods
free movement of services
free movement of capital
free movement of people
Award 1 mark for each correct freedom.
Question 2
Define legal sovereignty. (2 marks)
Answer:
Legal sovereignty is the legal right to exercise sovereign power, or sovereignty in theory.
Question 3
Explain two ways in which the four freedoms support the EU's aim of economic union. (6 marks)
Indicative mark scheme:
Possible developed points include:
Free movement of goods reduces barriers between national markets, helping create an integrated European market.
Free movement of services allows economic activity to operate across member-state borders.
Free movement of capital allows investment and money to move across the single market.
Free movement of people increases mobility within the integrated market.
Together, the freedoms reduce the economic separation of individual member states.
Credit a maximum of 6 marks for two developed explanations.
Question 4
Explain why the EU's aim of political union has been achieved only partially. (6 marks)
Indicative mark scheme:
A strong response may explain that:
member states participate in collective decision making
QMV means individual states do not always possess a veto
sovereignty can therefore be pooled
however, member states retain important national powers
vetoes remain in some areas
opt-outs demonstrate differing levels of integration
the UK's ability to leave demonstrates that national sovereignty has not disappeared
Question 5
Before leaving the EU, the UK participated in a system under which some decisions were made collectively and the country was required to observe the four freedoms of the single market.
Explain how these arrangements could limit parliamentary sovereignty. (6 marks)
Indicative mark scheme:
A developed answer should explain that:
Parliament normally claims authority to determine UK law and policy
EU membership required acceptance of common rules
the four freedoms limited independent policy choices associated with single-market participation
collective decision making could produce outcomes without an individual UK veto
relevant EU legal obligations therefore constrained Parliament's freedom in policy making
this could be interpreted as pooling or limiting sovereignty
Question 6
Explain two ways in which leaving the EU strengthened UK parliamentary sovereignty in relation to policy making. (6 marks)
Indicative mark scheme:
Possible points include:
Parliament gained greater freedom to legislate outside the general obligations of EU membership.
The previous position in which EU law could take precedence in relevant areas was changed.
UK policy was no longer determined through the EU's general membership decision-making arrangements.
The UK was no longer required to participate in the four freedoms as an EU member.
Parliament's ability to pass the EU Withdrawal Act itself demonstrated its legal sovereignty.
Answers should explain how the change affected policy making rather than simply stating that "sovereignty returned".
Question 7
Evaluate the view that the EU has successfully achieved its aims of political and economic union. (30 marks)
Indicative mark scheme:
Arguments supporting the view may include:
the four freedoms created extensive economic integration
the single market links national economies
common rules support an economic union
collective decision making demonstrates political integration
QMV shows that decision making can operate above purely national choices
sovereignty is pooled in areas of EU activity
Arguments challenging the view may include:
member states retain significant national sovereignty
political integration is not complete
states retain vetoes in some areas
opt-outs show differing levels of integration
the UK's former opt-outs from the euro and Schengen demonstrate limits
the UK's withdrawal demonstrates that membership does not eliminate national sovereignty
A high-level answer should distinguish between economic and political integration rather than reaching one general judgement about both.
Question 8
Evaluate the view that EU membership undermined UK parliamentary sovereignty. (30 marks)
Indicative mark scheme:
Arguments supporting the view:
EU law could take precedence over UK law in relevant areas
Factortame demonstrated the impact of EU law on Acts of Parliament
QMV meant the UK did not always possess a veto
participation in the single market required acceptance of the four freedoms
ECJ decisions constrained UK action within areas governed by EU obligations
Parliament therefore lacked complete freedom over some policy areas
Arguments challenging the view:
Parliament had voluntarily legislated for the UK's EU relationship
Parliament retained the ability to withdraw
the UK maintained vetoes in important areas
the UK secured opt-outs
sovereignty could be understood as pooled rather than surrendered
collective European decisions could increase UK influence over wider European policy
A strong conclusion should distinguish practical constraints during membership from Parliament's underlying legal ability to leave.
Question 9
Evaluate the view that leaving the European Union has fully restored parliamentary sovereignty. (30 marks)
Indicative mark scheme:
Arguments supporting the view:
Parliament legislated to change the UK's EU relationship
UK policy is no longer generally governed by EU membership obligations
Parliament has greater domestic legislative freedom
the UK no longer participates in QMV as an EU member
the UK is no longer generally bound by the four freedoms as an EU member
Brexit demonstrates that Parliament retained the ability to make and unmake law
Arguments challenging the view:
Parliament was legally sovereign even during EU membership because it could withdraw
the Executive may exercise much of the political power that returned to the UK
devolution complicates where returning powers should be exercised
referendum mandates constrain Parliament politically
EU-related arrangements remain practically important in Northern Ireland
legal sovereignty does not mean Parliament has unlimited political power
A strong overall judgement should distinguish formal legal sovereignty from political sovereignty in practice.
Question 10
Read the following source extract.
Supporters of Brexit argue that leaving the European Union restored control over UK policy making. Parliament is no longer generally required to accept the rules associated with EU membership, and the decision to leave demonstrated that Parliament could change the UK's legal relationship with the EU.However, sovereignty is more complicated than simply withdrawing from an international organisation. The government may exercise much of the power that returned to the UK, devolved institutions have their own claims to policy-making authority, and continuing arrangements involving Northern Ireland show that the practical consequences of EU withdrawal are not uniform.
Using the source, evaluate the view that leaving the European Union has significantly strengthened parliamentary sovereignty. (30 marks)
Indicative mark scheme:
Strong responses should pair competing arguments from the source.
Arguments that parliamentary sovereignty has been strengthened:
Parliament changed the UK's legal relationship with the EU
EU membership obligations no longer generally constrain domestic policy in the same way
policy making has returned to domestic institutions
Parliament demonstrated its ability to make and unmake law
withdrawal provides strong evidence of legal sovereignty
Arguments limiting the extent of the change:
Parliament retained underlying legal sovereignty even during membership
returning UK power may strengthen the Executive rather than Parliament itself
devolution distributes political authority within the UK
Northern Ireland demonstrates continuing practical interaction with the EU Single Market
political sovereignty remains subject to constraints despite increased legal autonomy
For the highest levels, the conclusion should explain which type of sovereignty has changed most. A convincing judgement would be that Brexit significantly strengthened or clarified Parliament's legal sovereignty in relation to EU policy making, while its political sovereignty remains substantially more constrained.
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