Jurisdiction(s):
United Kingdom

Related legal acts

Key definition

Climate Change definition

What does Climate Change mean? In legal practice, climate change describes long-term shifts in the Earth’s climate that inform environmental regulation, planning and EIA, governance and disclosure (ESG/TCFD), finance and litigation. Across the UK and Ireland it is generally a descriptive term rather than one exhaustively defined in statute or case law; climate legislation (for example, the Climate Change Act 2008 and analogous Acts in Scotland, Northern Ireland and Ireland) addresses related concepts such as greenhouse gas emissions, mitigation, adaptation and net zero targets, and instruments adopt their own definitions (for example, the UNFCCC’s focus on anthropogenic change). The term refers to identifiable, persistent changes (typically...

UK Oil and Gas: Regulation, Licensing, Contracts, Transactions, Health and Safety, Environment, Decommissioning and LNG Across Upstream, Midstream and Downstream (post-Brexit assimilated law overview)

Published by a LexisNexis Energy expert

Practice notes

For additional practical hands-on guidance on funding energy, power and resources projects across multiple sectors, including those covered in this Practice Note, refer as well to the textbook: Energy and Resources Financing: A Practical Handbook.

Status of EU directives following Brexit

Retained EU law (‘REUL’) denotes the legal category for EU-sourced rights and rules kept by the UK after Brexit.

It is a defined expression in the European Union (Withdrawal) Act 2018 (EU(W)A 2018), and serves as the umbrella label for the corpus of EU-derived law that the UK retained and transposed into domestic law, effective upon repeal of the European Communities Act 1972.

Assimilated law is the term applied to REUL that continues to have effect after the close of 2023 under the Retained EU Law (Revocation and Reform) Act 2023.

Re-labelling REUL (and related concepts) as assimilated law signals an alteration in its status and handling under UK law, meaning it will typically be read in accordance with standard domestic legal rules and principles of interpretation.

From 1 January 2024, REUL is ‘assimilated’ into domestic law on the basis that it is now generally relieved of EU-derived interpretive effects (eg supremacy of EU law, directly effective rights, and...

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Web page updated on 22/05/2026

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