NORTH SEAS ENERGY COOPERATION AGREEMENTS

1. Introduction

The North Seas Energy Cooperation (NSEC) is a regional framework through which North Sea countries coordinate the development of offshore renewable energy, electricity interconnection, offshore grids and increasingly renewable hydrogen infrastructure. It began as a political cooperation framework and remains essentially non-binding, rather than a supranational regulator. Current NSEC participants include Belgium, Denmark, France, Germany, Ireland, Luxembourg, the Netherlands, Norway and the European Commission. The United Kingdom cooperates with NSEC through a separate 2022 Memorandum of Understanding (MoU) following Brexit.

2. UK–NSEC Memorandum of Understanding 2022

On 18 December 2022, the UK and NSEC participants signed an MoU establishing a formal framework for offshore renewable-energy cooperation. It implements cooperation contemplated by the EU–UK Trade and Cooperation Agreement (TCA), particularly Article 321 concerning offshore renewable energy.

The arrangement enables cooperation concerning offshore wind farms, electricity interconnectors, offshore grid development and projects combining generation with cross-border transmission infrastructure.

Its importance arises from the physical nature of the North Sea electricity system: offshore wind resources and transmission infrastructure frequently involve more than one national jurisdiction. Coordinated planning can therefore reduce duplication and facilitate efficient cross-border infrastructure.

3. Principal Objectives

NSEC cooperation pursues several interconnected objectives. First, it facilitates the cost-effective development of offshore renewable generation. Second, it encourages coordinated offshore electricity-grid development and cross-border interconnection. Third, it contributes to security of energy supply by creating stronger connections between national electricity systems.

The framework also supports coordinated approaches to maritime planning, technical standards, infrastructure development and renewable-energy integration. NSEC's current work additionally encompasses the development of an offshore electricity and hydrogen grid.

4. Relationship with the EU–UK TCA

Following Brexit, Great Britain ceased participation in the EU internal energy market. Nevertheless, electricity and gas systems on both sides remain physically interconnected.

The EU–UK Trade and Cooperation Agreement consequently contains a dedicated energy framework dealing with electricity and gas markets, security of supply, renewable energy and offshore cooperation. In June 2025, the parties extended the application of the TCA's Energy Title to 31 March 2027.

The NSEC MoU therefore provides an important mechanism through which practical regional cooperation can continue despite the UK's changed institutional relationship with the EU.

5. Offshore Hybrid Projects

A particularly significant legal and regulatory issue concerns hybrid offshore projects. A traditional offshore wind farm normally connects to one national electricity system. A hybrid project may combine offshore generation with an interconnector capable of transferring electricity between different countries.

Such infrastructure creates difficult questions involving jurisdiction, network charging, congestion management, market access, cost allocation and regulatory responsibility. Cooperation agreements provide a framework within which participating states can coordinate solutions rather than regulate interconnected infrastructure entirely independently.

The 2023 Ostend Declaration expressly supported energy islands, hybrid cooperation, multi-purpose projects and greater North Seas connectivity.

6. Recent Development – Hamburg Declaration 2026

Regional cooperation was strengthened further at the North Sea Summit in Hamburg on 26 January 2026. Participating governments adopted declarations concerning cross-border offshore renewable projects, infrastructure security, financing, hydrogen and interconnected offshore grids.

The participating countries committed to pursuing 100 GW of joint offshore wind projects, including hybrid assets connected to more than one country. The arrangements also emphasise physical and cybersecurity protection of offshore energy infrastructure.

7. Case Law – R (Friends of the Earth Ltd) v Secretary of State for International Trade [2023] EWCA Civ 14

Case Name/Citation: R (Friends of the Earth Ltd) v Secretary of State for International Trade/UK Export Finance [2023] EWCA Civ 14.

Facts: The dispute concerned UK government financing for an overseas energy project and whether governmental decision-making was compatible with the UK's international climate commitments.

Legal Issue: The court considered how an international agreement, particularly the Paris Agreement, should affect domestic administrative decision-making.

Judgment: The Court of Appeal upheld the government's decision, concluding that the responsible ministers had adopted a legally permissible interpretation of the UK's international obligations.

Legal Principle/Ratio Decidendi: International agreements do not automatically create directly enforceable domestic rights where they have not been incorporated into domestic law. Nevertheless, such commitments may be legally relevant to governmental decision-making.

Significance: The principle is relevant to NSEC because many North Sea arrangements are international and politically cooperative rather than directly enforceable domestic legislation. Their domestic legal consequences therefore depend upon implementing legislation, regulatory powers and the legal character of the particular commitment.

8. Conclusion

North Seas Energy Cooperation provides an increasingly important framework connecting offshore wind development, interconnectors, hybrid projects, hydrogen, energy security and net-zero policy. For the UK, the 2022 NSEC MoU bridges post-Brexit institutional separation while allowing continued regional coordination. The 2026 Hamburg commitments demonstrate that North Sea governance is evolving toward deeper cross-border infrastructure cooperation, although many commitments remain dependent upon domestic legislation, regulatory approvals and project-specific agreements for legal implementation.