1. Introduction

ELEXON is a central institution in the governance of the electricity market in Great Britain. Its principal legal and operational role arises from the Balancing and Settlement Code (BSC). The BSC establishes the rules under which electricity imbalances are measured, calculated and financially settled between market participants.

The basic problem addressed by the BSC is that electricity generation and consumption cannot always exactly match the quantities contracted in advance. ELEXON administers the framework through which these differences are calculated and financially settled. The BSC also establishes governance arrangements involving the BSC Panel, ELEXON/BSCCo, BSC Parties, settlement agents and Ofgem. (bscdocs.elexon.co.uk)

Settlement administration therefore involves much more than accounting. It is a form of regulated market governance, because the accuracy of metering, calculation of imbalance volumes, reconciliation, invoicing, payments and dispute resolution directly affects the legal and financial position of electricity market participants.

2. Legal Foundation of ELEXON

The BSC was introduced as part of the New Electricity Trading Arrangements (NETA). NETA commenced in England and Wales in 2001 and was subsequently extended to Scotland. The BSC provides the legal framework for balancing and imbalance settlement. (bscdocs.elexon.co.uk)

The legal architecture can be understood as follows:

Electricity legislation and licences
↓
System Operator licence obligations
↓
Balancing and Settlement Code
↓
BSC Panel + ELEXON
↓
BSC Agents and central systems
↓
Metering, balancing and settlement calculations
↓
Invoices, payments and reconciliations

The BSC is particularly important because electricity suppliers and generators are generally required, through their licence arrangements, to become parties to the BSC. The Code therefore combines licensing obligations with contractual obligations between participating parties. (bscdocs.elexon.co.uk)

3. What is ELEXON?

ELEXON is the organisation responsible for administering the BSC and delivering the associated balancing and settlement services. It is a not-for-profit organisation funded by electricity-market participants. Its responsibilities include strategic operation and day-to-day management of the BSC and the systems required to administer it. (elexon.co.uk)

Historically, ELEXON was established as the Balancing and Settlement Code Company (BSCCo) in preparation for NETA. Government material describes ELEXON as responsible for administering the BSC and carrying out the settlement of electricity imbalances. (GOV.UK)

An important feature of its governance is that ELEXON is institutionally separated from the commercial interests of individual market participants. The BSC establishes controls over its governance, Board arrangements and relationship with the BSC Panel.

4. Governance Structure

A. Ofgem/GEMA

Ofgem, acting through the Gas and Electricity Markets Authority where appropriate, provides the external regulatory framework.

Its functions include:

regulation of licensed electricity companies;

approval or determination of significant BSC modifications;

oversight of code governance;

enforcement of licence conditions;

development of regulatory policy.

The relationship is therefore not one in which ELEXON independently creates the entire electricity-market regulatory framework. ELEXON operates within a legally established code and regulatory structure.

Recent reforms under the Energy Act 2023 have strengthened the formal regulatory framework for code managers. Ofgem determined in March 2025 that selection of a BSC code manager would proceed on a non-competitive basis and stated that code managers would be required to govern their designated codes independently and impartially. (Ofgem)

B. BSC Panel

The BSC Panel is a central governance body.

The current BSC framework provides for a Panel consisting of:

a Chair;

members elected by Trading Parties;

consumer representatives;

a member appointed by the transmission system operator/system operator;

independent members.

The Panel's responsibilities include supervising the operation of the BSC and dealing with modification proposals. (bscdocs.elexon.co.uk)

The Panel is particularly important because electricity-market rules must evolve as technology and market structures change.

For example, a modification can be proposed, assessed through the BSC governance process and ultimately submitted to Ofgem where regulatory approval is required. ELEXON administers this process but does not simply possess unrestricted legislative power over the electricity market. (bscdocs.elexon.co.uk)

5. ELEXON's Settlement Administration Function

Settlement administration is the process through which the market determines the financial consequences of differences between:

contracted electricity volumes
and
actual metered electricity volumes.

Suppose a supplier contracts for 100 MWh but its customers actually consume 110 MWh. The difference of 10 MWh constitutes an imbalance that must be financially settled under the BSC.

Similarly, if a generator contracts to produce 100 MWh but actually produces 90 MWh, the resulting difference is subject to the settlement arrangements.

The BSC therefore creates a central mechanism for transforming physical electricity deviations into legally enforceable financial obligations.

6. Role of the Settlement Administration Agent (SAA)

The Settlement Administration Agent (SAA) performs a particularly important technical function.

Under the SAA Service Description, the SAA is responsible for calculating and providing reports concerning amounts owed and owing as a consequence of Balancing Mechanism activity and settlement of imbalances. (bscdocs.elexon.co.uk)

The SAA operates several settlement runs, including:

Interim Initial Settlement Run;

Initial Settlement Run;

Reconciliation Settlement Runs;

Final Reconciliation Settlement Run.

It also produces relevant settlement and balancing reports. (bscdocs.elexon.co.uk)

This staged system recognises a fundamental characteristic of electricity markets: metering data is not always immediately complete or final.

Consequently, settlement can be progressively corrected as better information becomes available.

ELEXON explains that reconciliation occurs through successive calculations extending over approximately 14 months, allowing more accurate data to replace earlier estimates. (bscdocs.elexon.co.uk)

7. Settlement Administration Agents and Division of Responsibilities

Settlement governance is distributed among several specialised agents.

ELEXON identifies these agents as part of the BSC settlement architecture. (bscdocs.elexon.co.uk)

This division of responsibilities is important from a governance perspective because it prevents the entire settlement process from being concentrated in one operational function.

8. Financial Settlement and Clearing

The BSC does not merely calculate numbers; it creates a system for financial clearing and payment.

Under the BSC, different charges and payments arise from balancing and settlement activities. ELEXON's cash-flow arrangements use an ELEXON subsidiary as the counterparty for relevant settlement cash flows, with the Funds Administration Agent managing transfers between the clearing entity and BSC Trading Parties. (bscdocs.elexon.co.uk)

The FAA also manages credit-cover arrangements.

This is essential because electricity trading creates substantial short-term financial exposure. A participant could potentially owe substantial amounts following an imbalance, making credit protection an important element of market stability.

9. Credit Risk Governance

Credit governance protects the settlement system against participant default.

The ECVAA performs credit checks after Gate Closure and processes relevant credit-cover requests. The FAA manages the actual funds transfer and credit-cover arrangements. (bscdocs.elexon.co.uk)

Thus, settlement governance has three connected objectives:

Measurement → Calculation → Financial security

Without reliable metering, settlement calculations become inaccurate.
Without reliable calculations, invoices become disputed.
Without credit arrangements, even correct invoices may not be paid.

10. Transparency and Impartiality

A fundamental principle of ELEXON governance is impartiality.

The governance history of the BSC identifies principles including:

objectivity;

transparency;

inclusivity;

effectiveness;

efficiency.

The objective was to prevent the BSC governance system from becoming dominated by particular commercial interests. (elexon.co.uk)

This is particularly important because BSC decisions can have significant commercial consequences for generators, suppliers, traders and other market participants.

Panel members therefore operate under duties associated with the interests and objectives of the BSC rather than simply representing the commercial interests of their employers or constituencies.

11. Modification Governance

Electricity markets cannot remain legally static.

New technologies such as:

smart meters;

battery storage;

demand response;

distributed generation;

aggregators;

electric vehicles;

flexibility markets;

require modifications to established settlement rules.

The BSC therefore contains formal Modification Procedures.

A modification proposal can proceed through assessment and consultation before a recommendation is made to the appropriate regulatory authority. ELEXON administers the process, while the BSC Panel plays an important governance role. (bscdocs.elexon.co.uk)

This creates an important separation:

ELEXON administers the rules; it does not possess unlimited legislative authority to rewrite the electricity market.

12. Dispute Resolution

Because settlement involves large financial flows, errors or disagreements are inevitable.

The BSC consequently contains specific arrangements for Trading Disputes. The wider settlement timetable includes the Dispute Administrator and procedures governing the correction and resolution of settlement-related issues. (bscdocs.elexon.co.uk)

This is significant from an administrative-law perspective because settlement decisions affect property and contractual interests.

A robust dispute mechanism therefore contributes to:

procedural fairness;

predictability;

accountability;

correction of errors;

market confidence.

13. Case Law

Direct reported litigation specifically against ELEXON is comparatively limited. Consequently, the most useful authorities are cases dealing with the statutory/licensing framework, BSC arrangements, regulatory powers and electricity-market governance.

Case 1: SSE Generation Ltd & Others v Competition and Markets Authority [2022] EWCA Civ 1472

This is particularly important for understanding the legal status of the BSC.

The Court of Appeal discussed the Electricity Act 1989 licensing framework and the requirement for the transmission licence to contain a Balancing and Settlement Code governing electricity balancing and settlement. The case also considered the operation of the balancing mechanism and consequential financial obligations between Code parties. (Bailii)

Legal significance

The case demonstrates that balancing and settlement are not merely private commercial arrangements. They operate within a statutory and licensing architecture.

It therefore supports the proposition that:

The BSC forms part of the regulated legal infrastructure of the Great Britain electricity market.

This is fundamental to understanding ELEXON's governance role.

Case 2: R (on the application of British Gas Trading Ltd) v Gas and Electricity Markets Authority

British Gas and related regulatory litigation has repeatedly demonstrated the importance of distinguishing between:

statutory powers;

licence conditions;

industry codes; and

contractual consequences arising from those codes.

Such cases are relevant to ELEXON governance because the settlement system operates through precisely this interaction between regulatory rules and contractual obligations.

The general legal principle is that an industry code cannot be treated as an unlimited source of public regulatory power. The relevant statutory and licence framework determines the scope of authority.

Case 3: R (British Gas Trading Ltd) v Secretary of State for Energy and Climate Change

Judicial review litigation concerning electricity-market regulation illustrates the importance of legality and statutory authority when government or regulators alter energy-market arrangements.

The broader principle relevant to ELEXON is that regulatory bodies must act within the powers conferred upon them and follow applicable procedural requirements.

This is particularly significant where BSC modifications have substantial financial effects on market participants.

14. ELEXON and the Principle of Ultra Vires

The doctrine of ultra vires is relevant to electricity-code governance.

An administrative body cannot exercise powers beyond those granted by legislation, licences or legally valid delegated arrangements.

The BSC itself addresses this problem by establishing:

the powers of the Panel;

ELEXON's responsibilities;

modification procedures;

regulatory approval mechanisms;

dispute mechanisms;

voting arrangements;

relationships between BSC parties.

The historical ELEXON governance review specifically identified questions concerning "governance and vires", including who has authority to change the legal framework governing ELEXON and the BSC. (elexon.co.uk)

This demonstrates that institutional competence is not merely a corporate-governance issue; it is a question of public regulatory law.

15. ELEXON's Independence

ELEXON's independence is central to its legitimacy.

Government material concerning ELEXON's ownership explained that although ELEXON had historically been wholly owned by the system operator, the shareholder's powers were constrained by the BSC and ELEXON was designed to operate independently. (GOV.UK)

Subsequent reforms have further altered the institutional environment following the Energy Act 2023 and the creation of the National Energy System Operator (NESO) framework. The government formally implemented amendments to the BSC and electricity licences concerning ELEXON's ownership and governance. (GOV.UK)

The underlying legal principle is that the organisation administering market-wide settlement must not be controlled in a manner that permits one commercial participant to manipulate settlement rules for its own advantage.

16. Market-Wide Half-Hourly Settlement

ELEXON's governance role has expanded considerably with Market-wide Half-Hourly Settlement (MHHS).

Half-hourly settlement means that electricity consumption is measured and financially settled at much more granular intervals. ELEXON is responsible for implementing the MHHS programme, and its central systems have become operational as suppliers transition meters. (elexon.co.uk)

This transformation creates new governance questions involving:

data accuracy;

consumer consent;

smart-meter data;

cybersecurity;

privacy;

interoperability;

settlement accuracy;

supplier compliance.

Ofgem has also been considering the governance and legal basis for a Smart Data Repository connected with settlement data, demonstrating that ELEXON's settlement role increasingly intersects with data governance. (Ofgem)

17. Digitalisation and Future Settlement Governance

Modern electricity systems are increasingly decentralised and data-driven.

Traditional settlement was primarily concerned with generators, suppliers and large electricity transactions. Modern settlement increasingly has to accommodate:

domestic smart meters;

electric vehicles;

batteries;

demand-side response;

distributed energy resources;

aggregators;

flexibility markets.

The governance framework must therefore ensure that data used to determine financial obligations is:

accurate + secure + auditable + timely + legally authorised.

This makes ELEXON's role increasingly important as electricity markets move from a relatively centralised model towards a digitally coordinated system.

18. Relationship Between ELEXON and NESO

ELEXON and the electricity system operator perform different but complementary functions.

NESO

Primarily concerned with:

real-time system operation;

balancing physical electricity supply and demand;

system security;

transmission-system management.

ELEXON

Primarily concerned with:

BSC administration;

settlement;

market data;

financial consequences of imbalances;

code governance and implementation.

The distinction is essential.

NESO manages the physical system; ELEXON administers the rules and financial settlement architecture surrounding market balancing.

The two systems nevertheless interact closely because physical balancing decisions generate settlement consequences.

19. Governance Challenges

Several important governance challenges arise.

1. Independence

ELEXON must remain sufficiently independent from individual commercial interests.

2. Accuracy

Settlement depends upon accurate metering and data processing.

3. Timeliness

Electricity markets operate continuously, while legal settlement must nevertheless permit corrections.

4. Cybersecurity

Central settlement systems represent critical energy infrastructure.

5. Data protection

Smart-meter settlement involves detailed information about electricity consumption.

6. Market evolution

The BSC must accommodate batteries, EVs, aggregators and flexible demand.

7. Procedural fairness

Changes to settlement rules can have substantial financial consequences and therefore require transparent governance.

8. Regulatory accountability

There must be a clear division between ELEXON's administrative role and Ofgem's regulatory authority.

20. Recent Governance Reform

The governance model is continuing to evolve.

Ofgem's 2025 decision concerning selection of a BSC code manager reflects the wider energy-code reform programme introduced under the Energy Act 2023. Ofgem stated that code managers will have responsibility for governance of their designated codes and must perform that role independently and impartially. (Ofgem)

At the same time, ELEXON has been given additional responsibilities relating to new electricity-market structures, including MHHS and flexibility-market governance. (elexon.co.uk)

This means that ELEXON's role is evolving from a relatively specialised settlement administrator into a broader energy-market governance institution.

21. Key Legal Principles

The governance of ELEXON and settlement administration can therefore be understood through six major legal principles:

A. Legality

ELEXON must operate within the BSC, licences and underlying legislation.

B. Independence

Settlement administration must not be controlled by individual market interests.

C. Transparency

Modification and settlement procedures must be sufficiently transparent to allow participants to understand their obligations.

D. Accuracy

Metering and settlement calculations must accurately reflect electricity transactions and physical positions.

E. Procedural fairness

Participants require mechanisms to challenge or correct settlement errors.

F. Accountability

ELEXON operates within an institutional framework involving the BSC Panel, BSC Parties and Ofgem.

22. Conclusion

The governance of ELEXON and settlement administration represents an important example of modern energy regulation in which corporate governance, contract law, administrative law, licensing law, market regulation and electricity-system engineering intersect.

ELEXON administers the BSC and coordinates the complex systems through which electricity imbalances are measured and financially settled. The SAA performs the core settlement calculations, while other agents collect data, register metering systems, validate contract volumes and administer financial transfers. (bscdocs.elexon.co.uk)

The legal significance of the arrangement is illustrated by SSE Generation Ltd v CMA, where the Court of Appeal recognised the statutory and licensing foundation of the BSC and its role in balancing and settling electricity obligations. (Bailii)

Ultimately, effective ELEXON governance requires a balance between independence, regulatory accountability, technical accuracy, financial security, transparency and adaptability. That balance is becoming increasingly important as Great Britain's electricity system moves towards smart meters, distributed resources, flexibility markets and digital settlement.

Key authorities and materials

Electricity Act 1989 — statutory foundation for electricity licensing and regulation.

Energy Act 2023 — important recent reforms to energy-code governance.

Balancing and Settlement Code (BSC) — principal legal framework governing balancing and imbalance settlement.

SSE Generation Ltd & Ors, R (On the Application Of) v CMA [2022] EWCA Civ 1472 — important judicial authority concerning the BSC and electricity-market regulation. (Bailii)

Ofgem, Determination of the basis of selection of a code manager for the BSC (2025) — important for current code-governance reform. (Ofgem)

ELEXON, SAA Service Description — detailed framework for settlement administration and reconciliation. (bscdocs.elexon.co.uk)