Generation Licensing Regime under the Electricity Act 1989 (UK)

The Electricity Act 1989 created the modern statutory framework for electricity generation, transmission, distribution and supply in Great Britain. Its generation-licensing regime is principally contained in sections 4–8, supported by licence conditions, exemption regulations, regulatory powers of the Gas and Electricity Markets Authority (GEMA/Ofgem), planning and environmental legislation, and subsequent amendments.

The central principle is that generation of electricity is a regulated activity, but the Act does not require every generator to obtain an individual licence because Parliament has created exemptions for specified categories of generation. (Legislation.gov.uk)

1. Legislative foundation

Section 4 of the Electricity Act 1989 establishes the prohibition on carrying out certain electricity activities without the necessary authorisation. The Supreme Court has expressly described section 4 as making it a criminal offence to generate electricity without authorisation by licence, subject to the statutory exemption framework. (BAILII)

Section 6 provides the principal licensing mechanism. A generation licence is a licence granted under section 6(1)(a). The licensing regime also covers transmission, distribution, supply and interconnection, although these are distinct licensed activities. (Legislation.gov.uk)

Thus, the basic statutory structure can be represented as:

Generation → prohibition under s.4 → licence under s.6 or statutory exemption under s.5 → compliance with licence conditions and wider energy law.

2. What is a generation licence?

A generation licence authorises a person to undertake the regulated activity of generating electricity within the statutory framework.

The licence is therefore more than a commercial permission. It is a regulatory instrument through which Ofgem can impose legally enforceable conditions concerning matters such as:

operation of generating stations;

grid and system obligations;

market participation;

technical requirements;

compliance with industry codes;

information and reporting;

financial and administrative requirements;

regulatory directions; and

modification and enforcement mechanisms.

The modern regulatory system is consequently based on a combination of statute + individual licence + standard licence conditions + industry codes + regulatory decisions. The Court of Appeal has described sections 6–8 as giving GEMA powers to grant generation and other licences and to impose conditions. (BAILII)

3. Licensing authority: GEMA/Ofgem

The principal licensing authority is the Gas and Electricity Markets Authority (GEMA), with Ofgem operating as the regulatory office supporting GEMA.

Section 6 empowers GEMA to grant electricity licences, including generation licences. (BAILII)

This represents an important institutional shift from the pre-1989 model. The Electricity Act 1989 moved the sector toward:

independent regulation;

competition;

private participation;

separation of generation, transmission, distribution and supply; and

regulation through licences rather than direct governmental management of the entire electricity industry.

The regulator consequently acts as a statutory gatekeeper while allowing private and public enterprises to participate in electricity generation.

4. Application for a generation licence

A prospective generator must satisfy the statutory and regulatory requirements applicable to its proposed activity.

The licensing process generally involves consideration of:

the applicant's identity and corporate structure;

the nature and location of the generating facility;

ownership and operational arrangements;

technical capability;

regulatory compliance;

financial and organisational matters;

proposed connection arrangements;

applicable environmental and planning requirements; and

proposed licence conditions.

A generation licence, however, is not equivalent to planning permission or development consent.

This distinction is particularly important for large generating stations.

A project may therefore require several separate legal authorisations.

Simplified framework

5. Generation licence and construction of generating stations

One of the most important judicial interpretations concerns the relationship between a generation licence and consent to construct a generating station.

Trump International Golf Club Scotland Ltd v Scottish Ministers [2015] UKSC 74

The Supreme Court considered the statutory structure of the Electricity Act 1989 in the context of an offshore wind-energy project.

The Court explained that:

section 4 establishes the prohibition on unlicensed generation;

section 5 permits exemptions;

section 6 empowers GEMA to grant generation licences; and

section 36 provides a separate consent mechanism for the construction of certain generating stations. (BAILII)

Crucially, the Court rejected the proposition that a section 6 generation licence must necessarily precede a section 36 consent.

The judgment therefore demonstrates an important legal principle:

A generation licence and development consent are legally distinct authorisations.

This distinction is particularly relevant to renewable-energy projects.

A developer may need both regulatory authorisation to generate electricity and development consent to construct the generating facility, but the two legal regimes perform different functions.

6. Generation licence versus section 36 consent

For larger generating stations, section 36 of the Electricity Act 1989 has historically provided an important development-consent mechanism.

The distinction can be expressed as follows:

Generation licence

Concerned primarily with:

lawful electricity generation;

regulatory supervision;

licence conditions;

market and system obligations.

Section 36 consent

Concerned primarily with:

construction;

extension;

operation of specified generating stations;

development-control considerations.

The Trump International decision is therefore particularly important because it prevents the licensing system from being treated as a single, unified permission for an electricity project. (BAILII)

7. Exemptions from generation licensing

The Electricity Act 1989 does not require every generator to hold an individual generation licence.

Section 5 provides the statutory framework for exemptions.

This is important because imposing full licensing requirements on every small generator would be disproportionate.

The exemption framework has therefore enabled different regulatory treatment depending upon the nature and scale of generation.

Historically and practically, exemptions have been particularly significant for:

small generating installations;

certain renewable-energy facilities;

specific categories of generating stations;

embedded generation; and

other activities covered by statutory exemption orders.

The legal position is therefore:

Licence required unless the activity falls within an applicable exemption or other statutory authorisation.

8. Technology-neutral character of the regime

The Electricity Act 1989 was designed before many modern technologies became commercially important.

Nevertheless, its licensing architecture has been sufficiently adaptable to encompass:

gas-fired generation;

nuclear generation;

wind;

solar;

hydro;

biomass;

battery-related activities where legally characterised as generation or another regulated activity;

offshore generation; and

emerging electricity technologies.

The statutory framework has subsequently been supplemented by numerous regulations and amendments.

The Renewable Obligations regime, for example, developed additional regulatory rules concerning renewable generation, including detailed definitions of generating stations and technology-specific requirements. (Legislation.gov.uk)

9. Licence conditions

A major characteristic of the Electricity Act 1989 is that the licence itself becomes a central regulatory instrument.

Licence conditions may regulate matters that cannot practically be specified exhaustively in primary legislation.

The modern system consequently contains:

Primary legislation → secondary legislation → licence conditions → industry codes → regulatory decisions.

The Court of Appeal in SSE Generation Ltd v Competition and Markets Authority [2022] EWCA Civ 1472 described the Electricity Act 1989 as providing extensive licensing powers, including generation licensing, with GEMA empowered to impose and modify licence conditions. (BAILII)

10. Modification of generation licences

Electricity regulation must adapt to changing market structures and technologies.

Accordingly, the Electricity Act 1989 contains mechanisms for modification of licence conditions.

This enables the regulatory framework to respond to:

market reform;

renewable integration;

network constraints;

system balancing;

consumer protection;

decarbonisation;

security of supply; and

new electricity technologies.

However, licence modification is subject to statutory procedures and legal constraints. The power is therefore regulatory rather than unlimited.

11. Nuclear generation and special licensing arrangements

Nuclear electricity generation illustrates the flexibility of the licensing system.

The Nuclear Energy (Financing) Act 2022, for example, permits specified modifications to electricity generation licences for designated nuclear companies to facilitate investment in the design, construction, commissioning and operation of nuclear projects. (Legislation.gov.uk)

This demonstrates how the basic 1989 licensing architecture can be adapted through later legislation to accommodate particular infrastructure-financing models.

The generation licence therefore functions not merely as a historic authorisation but as an evolving regulatory platform.

12. Interaction with competition law

Generation licensing also operates within a competitive electricity market.

The 1989 Act was closely associated with the transition from a vertically integrated public electricity structure toward competitive generation and supply.

Consequently, generation licence conditions must operate alongside:

UK competition law;

retained/relevant EU-derived electricity rules where applicable;

market rules;

balancing arrangements;

network codes; and

regulatory decisions.

The SSE Generation litigation illustrates this interaction. The Court of Appeal noted the complex interaction between the Electricity Act 1989, regulatory decisions, retained EU law and electricity codes. (BAILII)

13. Industry codes and generation licences

A generation licence does not operate in isolation.

Generators may be required to comply with industry arrangements governing:

balancing;

settlement;

connection;

system operation;

technical standards;

metering; and

electricity trading.

The Balancing and Settlement Code (BSC) is an important example.

In SSE Generation, the Court of Appeal explained that the transmission licence required the system operator to maintain the BSC and that the code governs important balancing and settlement arrangements involving generators and other market participants. (BAILII)

Thus, a generator's legal obligations may derive from both its licence and legally recognised industry codes.

14. Offshore generation

Offshore renewable generation has generated particularly important legal questions.

Offshore wind projects may involve:

generation licensing;

section 36 consent;

marine licensing;

seabed rights;

transmission arrangements;

environmental assessment;

grid connection;

planning and development law.

The Trump International case is especially useful because it demonstrates that the statutory architecture governing generation projects must be interpreted according to the distinct functions of different statutory consents. (BAILII)

15. Enforcement

A generation licence is legally significant because its conditions are enforceable.

Regulatory enforcement may include:

compliance directions;

licence-condition enforcement;

financial penalties where legally authorised;

modification of licence conditions;

suspension or revocation mechanisms in appropriate circumstances; and

judicial review or statutory appeals where applicable.

The regulatory framework therefore combines permission with continuing supervision.

The generator does not simply obtain a licence and become legally independent of the regulator. It becomes subject to continuing regulatory obligations.

16. Revocation and suspension

A generation licence may contain provisions dealing with circumstances in which it can be suspended or revoked.

Modern legislation expressly recognises that electricity licences may contain provisions specifying conditions under which a licence can be revoked or suspended. (Legislation.gov.uk)

Because electricity generation is critical infrastructure, regulatory intervention must balance:

continuity of electricity supply;

regulatory compliance;

investor certainty;

consumer interests; and

procedural fairness.

17. Key case laws

1. Trump International Golf Club Scotland Ltd v Scottish Ministers [2015] UKSC 74

Principle: Generation licensing under section 6 and construction consent under section 36 are distinct statutory regimes.

The Supreme Court confirmed that the statutory scheme does not require the section 6 licence to precede section 36 development consent. (BAILII)

Importance: This is the leading case for understanding the relationship between generation licensing and development consent.

2. SSE Generation Ltd v Competition and Markets Authority [2022] EWCA Civ 1472

Principle: Electricity regulation under the Electricity Act 1989 involves licensing powers, licence conditions, industry codes and regulatory decisions.

The Court discussed GEMA's powers under sections 6–8 and the broader regulatory structure governing electricity generation and transmission. (BAILII)

Importance: The case demonstrates how generation licences operate within the wider electricity-market regulatory architecture.

3. Nexans France SAS v London Array Ltd [2026] EWCA Civ 887

This recent Court of Appeal case concerns offshore wind infrastructure and competition-related issues involving the London Array project and submarine power cables. It is not principally a generation-licensing case, but it illustrates the wider legal environment in which large licensed renewable-generation projects operate. (BAILII)

Its relevance is therefore contextual rather than a direct interpretation of section 6.

18. Importance for renewable-energy development

The generation licensing regime has become increasingly important because the electricity sector is moving toward:

decentralised generation;

offshore wind;

solar generation;

battery storage;

hydrogen-related electricity infrastructure;

smart grids;

flexible generation; and

low-carbon electricity systems.

The challenge is to preserve the regulatory functions of licensing without creating unnecessary barriers to innovation.

The regime has consequently evolved through successive legislation and regulatory reforms rather than remaining confined to its original 1989 structure.

19. Contemporary development of the regime

The Electricity Act framework continues to be amended.

For example, the Energy Act 2023 introduced additional electricity licensing concepts, including electricity system-operation and code-management activities. The Government's explanatory material expressly notes that the Electricity Act 1989 prohibits specified activities unless the person is licensed or exempt. (Legislation.gov.uk)

This demonstrates the continuing importance of the licensing model as a method of regulating new electricity-market functions.

The regime is therefore not simply a historical licensing system established in 1989; it is an evolving regulatory architecture.

20. Critical legal analysis

The generation licensing regime achieves several objectives simultaneously.

A. Regulatory control

It ensures that electricity generation occurs within a legally supervised framework.

B. Market competition

It facilitates participation by different generating companies rather than reserving generation to a state monopoly.

C. System security

Licence conditions can support technical and operational requirements necessary for maintaining electricity-system stability.

D. Consumer protection

Regulatory supervision can address conduct affecting electricity consumers and the wider market.

E. Energy transition

The licensing system can be adapted to renewable and emerging technologies.

F. Investment certainty

A statutory licence provides investors with a defined legal framework governing the operation of generating facilities.

Conclusion

The generation licensing regime under the Electricity Act 1989 is based on a fundamental statutory principle: electricity generation is a regulated activity that generally requires authorisation, while Parliament has created exemptions for specified circumstances. Section 4 establishes the prohibition, section 5 provides the exemption framework, and section 6 provides the principal mechanism for granting generation licences. (BAILII)

The most important legal point is that a generation licence is not the same thing as development consent. The Supreme Court's decision in Trump International Golf Club Scotland Ltd v Scottish Ministers confirms the distinct legal functions of the section 6 licensing regime and section 36 development-consent regime. (BAILII)

Modern cases such as SSE Generation Ltd v CMA further demonstrate that generation licences operate within a much broader regulatory ecosystem involving GEMA/Ofgem, licence conditions, industry codes, balancing arrangements, competition law and subsequent energy legislation. (BAILII)

Accordingly, the Electricity Act 1989 can best be understood not merely as a statute requiring a licence to generate electricity, but as the foundational legal architecture for continuing regulatory supervision of electricity generation in Great Britain.