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Implementation of EU legislation meaning

Published by a LexisNexis EU Law expert
What does Implementation of EU legislation mean?
Implementation of EU legislation describes how EU legal acts are given effect in practice. At national level this chiefly means transposing EU Directives into domestic law by primary or secondary legislation and taking administrative and enforcement measures. EU Regulations are directly applicable, but often require national measures for procedures, penalties and regulators. At EU level, “implementation” also refers to Commission or Council implementing acts under Article 291 TFEU that set the technical detail needed to apply legislation. The term is descriptive rather than a defined legal term; “transposition” is the usual term for Directives. Ireland, as an EU Member State, continues to transpose Directives (commonly by statutory instruments under the European Communities Act 1972 (as amended) or by Acts) and to make enforcement measures for Regulations. In the UK, EU measures were implemented principally under the European Communities Act 1972 before IP completion day. Those measures largely became retained (now “assimilated”) EU law. Great Britain no longer implements new EU legislation. Under the Windsor Framework, certain EU rules continue to apply in Northern Ireland and are implemented through UK and NI legislation. Practically, correct and timely implementation is central to compliance, drafting and regulatory alignment, and affects litigation risk and public law challenge.
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View the related Checklists about Implementation of EU legislation

CHECKLISTS
Easements in property transactions: due diligence checklist on identification, registration, scope, maintenance, interference, alteration/termination, utilities, and creation/reservation—England and Wales

ARCHIVED: This Flowchart has been archived and is not maintained. Retained EU law is a concept introduced by the European Union (Withdrawal) Act 2018 (EU(W)A 2018) as part of Brexit preparations, establishing a new category of domestic legislation. It denotes the collection of EU‑derived rules preserved and converted into UK law under the EU(W)A 2018 (as amended) at the end of the post‑Brexit transition period (IP completion day). For background on the transition period, and what it means for retained EU law, see: In the context of Brexit, what is meant by the ‘transition or implementation period’? For further background reading on the underlying legislation, see: Practice Note: Brexit—key legislation explained News Analysis: What does IP completion day mean for the status of EU law in the UK? What is retained EU law? Retained EU law is a broad, complex legal term defined by the EU(W)A 2018. It covers anything that continues to form part of domestic law on or...

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CHECKLISTS
EU Merger Control: Practical Checklist for Preparing and Submitting Form CO to the European Commission

ARCHIVED: This flowchart has been archived and is no longer maintained. Retained EU law was introduced by the European Union (Withdrawal) Act 2018 (EU(W)A 2018) as part of preparations for Brexit, establishing an entirely new strand of domestic law. The term covers the suite of EU-derived rules preserved and converted into domestic law by the EU(W)A 2018 (as amended) at the close of the post-Brexit transition phase (IP completion day). For background on the transition period, and its effect on retained EU law, see: In the context of Brexit, what is meant by the ‘transition or implementation period’? For further background on the underlying legislation, see: Practice Note: Brexit—key legislation explained News Analysis: What does IP completion day mean for the status of EU law in the UK? What is retained EU law? Retained EU law is a broad and intricate legal label, set out in the EU(W)A 2018, meaning anything that, by virtue of...

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FLOWCHARTS
Digital content: consumer cancellation rights, exclusions and information requirements under the Consumer Contracts (Information, Cancellation and Additional Charges) Regulations 2013—distance, off-premises and on-premises sales (Flowchart)

ARCHIVED: 11 pm (GMT) on 31 December 2020 signalled the conclusion of the Brexit transition/implementation phase that followed the UK’s exit from the EU. At that moment in time (known in UK legislation as ‘IP completion day’), the principal transitional provisions finally ceased. From IP completion day, the UK is unable to take an active role in the European Arrest Warrant (EAW), as EAWs apply solely to Member States...

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NEWS
UK and EU environmental law weekly: consultations, policy and case updates across climate, hydrogen, buildings, enforcement, nuclear, ESG, chemicals (PFAS), biodiversity, waste and water—9 October 2025

In this issue: Air emissions and climate change Contamination and pollution Energy efficiency and buildings Energy for environmental lawyers Environmental information Environmental taxes, reliefs and incentives ESG and sustainability Hazardous substances and chemicals Nature, biodiversity and habitat conservation Waste Water, flooding and drainage Daily and weekly news alerts New and updated content Air emissions and climate change Greenhouse Gas Removals (GGR)-UK government publishes Business Model documentation On 27 August 2025, the Department for Energy Security and Net Zero (DESNZ) released a suite of papers on its proposed Greenhouse Gas Removals (GGR) Business Model and accompanying policy. The Lexis+ Energy team, working with Navraj Singh Ghaleigh, Senior Lecturer in Climate Law at the University of Edinburgh Law School, set out the context for the GGR Business Model; its relationship with the Power BECCS Business Model; the technologies the GGR framework intends to encompass; its legal footing and principal features; and how...

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NEWS
UK Public Law Weekly Briefing: Brexit and assimilated law reforms, key SIs, judicial review, procurement, human rights, data, and subsidy control developments (21 November 2024)

In this issue: Brexit highlights Brexit SIs Post-Brexit transition guidance Judicial review Constitutional and administrative law Equality and human rights Information law Subsidy control and state aid Public procurement Management and strategic planning Daily and weekly news alerts New and updated content Dates for your diary Trackers Useful information Brexit highlights The Cabinet Office has released an explanatory memorandum concerning the UK/EU TCA Partnership Council decision (COM(2024)297). The proposal sets out the EU’s stance in the Partnership Council on amending Annex 3 to the Trade and Cooperation Agreement between the EU and UK, which covers product-specific rules of origin. See: LNB News 15/11/2024 16. The House of Commons Library has issued a briefing on assimilated law reform, outlining the Labour government’s approach following the 2024 general election. The second statutory report, published in July 2024, notes that of the 6,735 items of retained EU law (REUL)...

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NEWS
UK and EU information law update: DSIT Cyber Security and Resilience Bill, NCSC PAW principles, CJEU DSAR explainability, Meta pay‑or‑consent, ICO anonymisation guidance and NHS software provider fine

In this issue: Cybersecurity Data protection LexTalk®Information Law: a Lexis®Nexis community Daily and weekly news alerts Cybersecurity DSIT unveils Cyber Security and Resilience Bill policy statement and scope The Department for Science, Innovation and Technology (DSIT) has outlined plans for the forthcoming Cyber Security and Resilience Bill, due to reach Parliament in 2025. The proposals will oblige around 1,000 providers—spanning data centres, managed service operators and critical suppliers—to adhere to tougher cyber security obligations. The Bill also provides regulators with enhanced oversight powers and permits the Technology Secretary to adjust regulatory frameworks in line with emerging risks. The National Cyber Security Centre (NCSC) managed 430 cyber incidents in the year to September 2024, 89 labelled nationally significant. The legislation seeks to counter threats that cost the UK economy an estimated £22bn each year between 2015 and 2019. See: LNB News 01/04/2025 22 and News Analysis: UK to single out cybersecurity vulnerabilities under new Bill. NCSC releases new principles...

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PRACTICE NOTES
UK DTR 2: issuer obligations on disclosure, delay, control and selective disclosure of inside information—FCA/ESMA guidance, case law, COVID‑19 context and enforcement (post‑Brexit UK MAR)

Resource Note This Resource Note signposts key commentary, analysis and materials to aid interpretation and offer practical direction on using Chapter 2 of the Disclosure Guidance and Transparency Rules (DTR 2). Where relevant, it draws on: the Financial Conduct Authority (FCA) Handbook FCA Knowledge Base—Procedural and Technical notes (formal guidance binding on the FCA) FCA consultation and discussion papers, policy and feedback statements, and warnings Primary Market Bulletins and other FCA publications legacy UKLA technical and procedural notes and the UKLA’s newsletter List!, where still pertinent assimilated EU legislation EU Directives and EU Regulations, where helpful to construing a provision Lexis+® UK analysis and resources Setting the scene What it covers: DTR 2 prescribes the framework for issuers to disclose and manage inside information, supporting timely and even-handed release of market-sensitive information. It also identifies specific situations permitting a delay to public disclosure of inside information, together with the safeguards required to keep such information...

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PRACTICE NOTES
UK FCA DTR 1–1C: application, post‑Brexit and 2024 listing reforms, MAR interplay, audit committees, misleading disclosures and related party rules

This Resource Note spotlights commentary, analysis and materials to aid interpretation and give practical guidance on applying Chapters 1, 1A, 1B and 1C of the Disclosure Guidance and Transparency Rules: DTR 1, DTR 1A, DTR 1B and DTR 1C respectively. Materials referenced here include, where pertinent: the Financial Conduct Authority (FCA) Handbook FCA Knowledge Base guidance—Procedural notes and Technical notes (constituting formal guidance and binding on the FCA) FCA consultation papers, discussion papers, policy statements, feedback statements and warnings Primary Market Bulletins and other FCA publications former UKLA technical and procedural notes and the UKLA newsletter List!, where still relevant to interpreting or applying a provision assimilated EU legislation EU Directives and EU Regulations, where relevant to interpreting a provision Lexis+ UK analysis and resources Setting the scene What it covers: DTR 1 sets out the Disclosure guidance, explaining its scope and purpose; DTR 1A sets out the transparency rules with their scope and purpose;...

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PRACTICE NOTES
UK post-Brexit payments and e-money: retained EU law, statutory instruments and onshoring changes—status guide to 2EMD, CBPR/SEPA, PAD, PSD2, IFR

Brexit Financial Services Legislation Status Guide This guide outlines high-level information on the status of EU laws regulating the payments sector, namely: the second Electronic Money Directive (Directive 2009/110/EC) (2EMD) the Cross-Border Payments Regulation (Regulation (EC) 924/2009) (CBPR) as amended by Regulation (EU) 2019/518 (CBPR2) the Regulation establishing technical and business requirements for credit transfers and direct debits in euro and amending the CBPR (Regulation (EU) 260/2012) (SEPA Regulation) the Payment Accounts Directive (Directive 2014/92/EU) (PAD) the recast Payment Services Directive (Directive (EU) 2015/2366) (PSD2) the Interchange Fee Regulation (Regulation (EU) 2015/751) (IFR) This Practice Note should be read alongside the following Practice Notes: Impact of Brexit: Payment services and electronic money directives—quick guide [Archived] Impact of Brexit: SEPA Regulation—quick guide [Archived] Impact of Brexit: Payment accounts—quick guide [Archived] Impact of Brexit: Interchange Fee Regulation—quick guide [Archived] During the implementation period from 1 January 2020 to 31 December 2020...

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PRECEDENTS
UK GDPR and DPA 2018: practitioner quick reference on controllers, processors, lawful bases, special category data, data subject rights, international transfers and ICO enforcement (DUAA 2025)

STOP PRESS: This page is being revised to reflect implementation of the Data (Use and Access) Act 2025 (DUAA 2025), which modifies the UK GDPR and the Data Protection Act 2018. For additional direction on DUAA 2025’s compliance impact, consult Practice Note: Data (Use and Access) Act 2025—compliance implications. This data protection quick-reference guide outlines the principal elements of data protection law, including the UK General Data Protection Regulation (UK GDPR). What is the UK GDPR? The UK General Data Protection Regulation (Assimilated Regulation (EU) 2016/679—UK GDPR) forms the primary framework for data protection in the UK. It is read alongside, and augmented by, the Data Protection Act 2018 (DPA 2018). Who is the data protection regulator in the UK? In the UK, the Information Commissioner’s Office (ICO) oversees and enforces compliance with data protection legislation. What type of information does the UK GDPR regulate? The UK GDPR does not apply to every kind of information or dataset. Its remit is limited to personal...

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