NET-ZERO OBLIGATIONS OF MARKET INSTITUTIONS

1. Introduction

Net-zero obligations of market institutions refer to the statutory, regulatory and administrative responsibilities imposed on institutions governing electricity and energy markets to support the United Kingdom’s transition toward net-zero greenhouse-gas emissions by 2050. Relevant institutions include the Secretary of State, Ofgem/GEMA, National Energy System Operator (NESO), electricity network operators and bodies administering market and industry-code arrangements.

The principal legal framework consists of the Climate Change Act 2008, Electricity Act 1989 and Energy Act 2023, together with licences, electricity codes and regulatory decisions. These instruments increasingly integrate decarbonisation into electricity-market governance.

2. Climate Change Act 2008

The Climate Change Act 2008 provides the foundation of UK net-zero law. Section 1 requires the Secretary of State to ensure that the net UK carbon account for 2050 is at least 100% below the 1990 baseline, establishing the statutory net-zero target.

The Act additionally establishes successive carbon budgets. Under sections 13 and 14, the government must prepare proposals and policies for meeting carbon budgets and report them to Parliament.

Consequently, electricity-market institutions operate within a broader statutory system in which market design, generation investment, network development and flexibility increasingly influence achievement of legally binding climate objectives.

3. NESO and the Statutory Net-Zero Objective

The Energy Act 2023 significantly strengthened the institutional relationship between energy-market governance and net zero by establishing the statutory framework for the independent system operator and planner, now NESO.

The legislation gives the system operator three central objectives: the net-zero objective, security-of-supply objective, and efficiency-and-economy objective.

The net-zero objective specifically concerns enabling the Secretary of State to meet the duties arising from sections 1 and 4 of the Climate Change Act 2008. Therefore, long-term electricity-system planning is legally connected to achievement of the national climate framework.

4. Ofgem and Market Regulation

Ofgem, acting through the Gas and Electricity Markets Authority, regulates electricity networks and markets through licensing, price controls, code governance and enforcement.

Net-zero considerations can affect decisions concerning network investment, renewable connections, electricity storage, flexibility markets, charging methodologies and anticipatory infrastructure investment.

However, net-zero responsibilities do not eliminate other statutory considerations. Market institutions must balance decarbonisation with security of supply, affordability, competition, efficiency and consumer protection. The legal challenge therefore concerns integrating climate objectives into market governance without disregarding other statutory duties.

5. Electricity Market Design

Net-zero obligations increasingly influence the architecture of electricity markets. High levels of wind and solar generation require additional transmission infrastructure, storage, demand flexibility and balancing resources.

Market institutions may therefore need to design arrangements that encourage low-carbon generation, efficient network utilisation and flexibility, while maintaining system stability.

The transition also affects instruments such as the Contracts for Difference regime, capacity arrangements, balancing services and network charging structures. Market rules that create unjustified barriers to low-carbon investment may consequently attract regulatory reform.

6. Case Law – Friends of the Earth v Secretary of State for Energy Security and Net Zero [2024] EWHC 995 (Admin)

Case Name/Citation: Friends of the Earth Ltd, ClientEarth and Good Law Project v Secretary of State for Energy Security and Net Zero [2024] EWHC 995 (Admin).

Facts: The claimants challenged the government's Carbon Budget Delivery Plan, which contained policies intended to achieve statutory carbon budgets under the Climate Change Act 2008.

Legal Issue: The principal question was whether the Secretary of State had lawfully concluded that the proposed policies would enable the statutory carbon budgets to be achieved.

Judgment: The High Court upheld important grounds of challenge. It concluded that the Secretary of State had proceeded on an incorrect understanding regarding the assumption that quantified policies would be delivered in full.

Legal Principle/Ratio Decidendi: When exercising duties under section 13 of the Climate Change Act, the government must properly address material risks to policy delivery and achievement of carbon budgets. Climate planning requires a lawful assessment of whether proposed measures can realistically contribute to statutory targets.

Significance: The judgment demonstrates that net-zero governance is not merely political aspiration. Where Parliament creates statutory climate duties, responsible institutions must make decisions consistently with those requirements and adequately consider implementation risks.

7. Accountability and Judicial Review

Market institutions remain subject to administrative-law principles, including legality, rationality, procedural fairness and consideration of relevant statutory factors. Courts generally respect expert regulatory judgment, but they may intervene where decision-makers misunderstand statutory duties or fail to consider legally material matters.

This creates an important accountability mechanism for the energy transition.

8. Conclusion

Net-zero obligations increasingly shape UK electricity-market institutions. The Climate Change Act 2008 establishes binding national targets, while the Energy Act 2023 expressly embeds net zero within NESO’s statutory objectives. Ofgem and other institutions must integrate decarbonisation with security, efficiency, affordability and consumer protection. Net-zero electricity governance is therefore evolving from general environmental policy into a structured system of statutory duties, regulatory decision-making, market design and judicial accountability.