Data-Sharing Agreements in Electricity Markets – Detailed Explanation With Case Laws

1. Introduction

Data-sharing agreements in electricity markets are legal arrangements that explain how electricity-related data can be collected, shared, used and protected between different organisations. Electricity markets involve generators, suppliers, DNOs, NESO, traders, aggregators, meter operators and consumers. These parties need to exchange information for trading, settlement, network planning, flexibility and system balancing. A data-sharing agreement creates clear rules about who can use the data, for what purpose and under what conditions.

2. Meaning of Data-Sharing Agreement

A data-sharing agreement is usually a contract or formal arrangement between two or more organisations. It can specify the type of data being shared, purpose of sharing, method of transfer, security requirements, responsibilities and duration. In electricity markets, the agreement may cover meter data, consumption information, generation data, network information, market information or customer details.

3. Why Data Sharing Is Necessary

Electricity markets cannot operate effectively if important information remains separated between different organisations. For example, suppliers need meter information for billing and settlement. DNOs need information about electricity demand for network planning. Flexibility providers need information about network constraints. NESO needs system information for balancing and operation. Data-sharing agreements help these organisations exchange information in an organised way.

4. Personal Data and UK GDPR

A major issue is whether the shared information is personal data. Detailed household electricity consumption may reveal information about an identifiable consumer and can therefore fall within UK GDPR. The parties must identify an appropriate lawful basis for processing and follow principles such as lawfulness, fairness, transparency, purpose limitation, data minimisation, accuracy and security. The ICO also recommends clear arrangements where organisations share personal information.

5. Purpose Limitation

The agreement should clearly state why the data is being shared. For example, data collected for electricity settlement should not automatically be reused for unrelated marketing. Purpose limitation reduces the risk of unnecessary use of consumer information. If a new purpose is introduced, the organisations may need to reconsider the legal basis and transparency requirements.

6. Data Security

Electricity-market data may have both personal and commercial value. Agreements should therefore contain security requirements covering access controls, encryption, authentication, data storage, cyber incident reporting and secure data transfer. This is particularly important because electricity systems are critical infrastructure. A cyberattack involving market or network data could affect both digital systems and physical electricity operations.

7. Accuracy and Data Quality

The parties should also decide who is responsible for ensuring that shared information is accurate. Incorrect meter or generation information can cause problems in billing, settlement and network planning. A good agreement should therefore establish procedures for correcting errors, updating information and reporting data-quality problems.

8. Confidentiality and Commercial Information

Electricity trading involves commercially sensitive information. A data-sharing agreement can specify which information is confidential and prevent the receiving organisation from using it for an unrelated competitive purpose. This is important where companies exchange information about trading positions, network constraints, generation capacity or business plans.

9. Data Sharing and Market Competition

Data-sharing arrangements must not unnecessarily restrict competition. If one company receives valuable market data but prevents other legitimate participants from accessing comparable information, competition concerns may arise. Data-sharing frameworks should therefore be transparent and proportionate. Ofgem's Data Best Practice approach encourages better accessibility and use of energy-sector data while recognising the need for appropriate controls.

10. Case Law – Lloyd v Google

In Lloyd v Google LLC [2021] UKSC 50, the Supreme Court considered large-scale processing of personal data. The Court rejected the representative claim in the form presented. The case is relevant because electricity companies can process very large quantities of consumer information. It shows the importance of identifying the legal consequences of large-scale personal-data processing.

11. Case Law – Vidal-Hall v Google

In Vidal-Hall v Google Inc [2015] EWCA Civ 311, the Court of Appeal considered misuse and processing of private information. The case is relevant to electricity markets because detailed consumption information can reveal aspects of a person's private life. Data-sharing agreements should therefore contain strong privacy protections where household energy data is involved.

12. Case Law – WM Morrison Supermarkets plc v Various Claimants

In WM Morrison Supermarkets plc v Various Claimants [2020] UKSC 12, the Supreme Court considered an employer's liability for an employee's misuse of personal data. The case is relevant because it demonstrates the importance of controlling how employees and authorised users handle personal information. Electricity organisations should therefore define access rights and responsibilities clearly in data-sharing arrangements.

13. Main Contents of an Agreement

A strong electricity data-sharing agreement should normally cover the parties, categories of data, purpose, legal basis, permitted users, security measures, confidentiality, data retention, accuracy, breach reporting, audit rights and termination. It should also explain what happens to the information when the agreement ends.

14. Conclusion

Data-sharing agreements are an important part of modern electricity-market governance. They allow suppliers, DNOs, NESO, traders and other participants to exchange information needed for trading, settlement, network planning, flexibility and system balancing. At the same time, these agreements must protect consumers and commercially sensitive information. A strong framework should combine clear contractual duties, UK GDPR compliance, data security, accuracy requirements, confidentiality and fair access. In this way, data can be shared efficiently without weakening privacy, competition or accountability in electricity markets.