Nuclear energy remains an important component of the United Kingdom’s strategy to deliver reliable, low‑carbon power. This destination note outlines the legal, regulatory and commercial considerations for sponsors, financiers, contractors and public authorities engaged in nuclear projects in England and Wales. Our London office is at Holborn Gate, 330 High Holborn, London, WC1V 7QH, England.

Strategic and regulatory landscape

The UK’s approach to nuclear projects combines national energy policy with a rigorous licensing and safety regime. New developments range from gigawatt‑scale plants to Small Modular Reactors (SMRs) and advanced modular designs. Key policy drivers include net zero targets, energy security and domestic industrial strategy. Regulatory oversight focuses on safety, security, safeguards, environmental protection and long‑term waste management.

Project lifecycle: from development to decommissioning

Legal issues follow the lifecycle of a nuclear project. Early stages require planning consents and environmental assessment (including EIA and marine licences where applicable), land rights and local engagement. Licensing is iterative: construction consent, nuclear site licence and permission to operate fall under a structured permitting process. Decommissioning and radioactive waste management must be addressed at the outset, with financial provision and contractual allocation of long‑term liabilities.

Commercial, contractual and financing considerations

Developers and sponsors must coordinate multiple strands of commercial risk management. Typical considerations include:

• Financing model: allocation between equity, debt, export credit, and public support mechanisms (models such as Regulated Asset Base arrangements have been used in the UK context).
• Contract packaging: EPC, owner’s engineer, O&M, fuel supply and waste‑management contracts with robust interfaces and indemnities.
• Liability and insurance: aligning contract provisions with statutory liability regimes and ensuring appropriate insurance capacity for construction and operation phases.
• Supply chain and localisation: procurement, supplier performance guarantees and contingency planning for critical components.
• Foreign investment and export controls: screening of foreign direct investment, export controls on nuclear‑related technologies and compliance with safeguards obligations.

Practical checklist

1. Confirm strategic fit: map the project against national energy policy and grid requirements.
2. Site and planning due diligence: secure land rights, planning consents and complete required environmental assessments.
3. Regulatory engagement: early contact with the Office for Nuclear Regulation and environmental authorities to define milestones.
4. Financial structuring: identify potential public support, ECA or multilateral funding and test investor appetite for long‑tenor, capital‑intensive projects.
5. Contract strategy: design EPC, supply and O&M contracts with clear risk allocation and commissioning benchmarks.
6. Decommissioning and waste plan: secure funding mechanisms and contractual allocation to meet long‑term obligations.
7. Compliance programme: develop export/safeguards compliance, security arrangements and community engagement strategy.

Jurisdiction and sources

Primary institutions and legal instruments relevant in England and Wales include the Office for Nuclear Regulation (ONR), the Environment Agency, the Department for Energy Security and Net Zero, the Nuclear Decommissioning Authority, Radioactive Waste Management Ltd, and international standards and guidance from the International Atomic Energy Agency (IAEA). Key legislation includes the Nuclear Installations Act 1965 and relevant secondary legislation and guidance published by the above bodies.

Parties should adopt an integrated approach that combines regulatory compliance, robust contract engineering and commercially realistic financing structures. Early stakeholder engagement, transparent allocation of long‑term liabilities and careful supply‑chain planning materially reduce execution risk.

General information only; not legal advice and not a substitute for advice on a particular matter.