Crisis-Time Market Rule Overrides

Detailed Explanation With Case Laws

1. Introduction

Crisis-time market rule overrides refer to temporary changes, suspensions or emergency departures from ordinary electricity-market rules when normal arrangements are unable to protect system security, continuity of supply or consumers.

Electricity markets normally operate through detailed rules covering balancing, settlement, dispatch, network charges and trading. During a serious emergency, however, following every ordinary market rule may sometimes make the situation worse.

For example:

Major generator failure → shortage → emergency balancing action → ordinary market rules become unsuitable → temporary emergency rule or instruction → system stability protected.

The important legal issue is that an emergency does not automatically give regulators unlimited power to ignore existing rules.

2. Meaning of a Market Rule Override

A market-rule override may involve:

emergency dispatch instructions;

temporary changes to balancing arrangements;

emergency interconnector actions;

temporary settlement changes;

suspension or modification of normal procedures;

emergency directions to licensed companies; or

accelerated modification of industry codes.

The purpose should be crisis management, rather than giving a particular market participant an unfair commercial advantage.

3. Why Overrides May Be Necessary

Electricity markets operate under normal assumptions about:

available generation;

network capacity;

predictable demand;

functioning trading systems; and

normal balancing arrangements.

A major crisis can invalidate these assumptions.

For example, if several generators unexpectedly fail, the system operator may need to obtain electricity immediately rather than wait for normal trading processes.

Similarly, an interconnector may need to provide emergency assistance rather than operate only according to ordinary commercial arrangements.

Ofgem documents recognise emergency actions in balancing arrangements, including Emergency Assistance and Emergency Instructions involving interconnectors. (Ofgem)

4. Legal Authority

In Great Britain, emergency interventions must be connected to a lawful statutory or regulatory power.

The Electricity Act 1989 contains provisions concerning directions. Section 107 provides that a person to whom a direction is given must give effect to it, and that directions must be in writing. (Legislation.gov.uk)

This is important because an emergency override should have:

a legal basis;

a defined decision-maker;

clear conditions for use;

appropriate documentation; and

a mechanism for review.

5. Balancing and Settlement Code

The Balancing and Settlement Code (BSC) is central to electricity-market operation in Great Britain.

It governs important matters including:

balancing;

settlement;

imbalance pricing;

market participation; and

payments between market participants.

Ofgem can approve modifications to the BSC where the applicable objectives are satisfied.

During urgent circumstances, the BSC modification process can also be accelerated.

For example, in 2026 Ofgem granted urgency for BSC Modification P511, while rejecting urgency for P509 and P510. This demonstrates that urgency itself is governed by a regulatory process rather than being automatic. (Ofgem)

6. Emergency Versus Urgent Rule Modification

These two concepts should not be confused.

Emergency Operational Action

The system operator takes immediate action to protect the electricity system.

Urgent Rule Modification

A formal market rule is changed more quickly than through the ordinary modification timetable.

For example, Ofgem approved urgent treatment of BSC P507 because the issue was considered capable of causing significant commercial impacts if not addressed quickly. (Ofgem)

Therefore:

Emergency operation ≠ automatic rewriting of market law.

7. Case Law: SSE Generation v CMA

R (SSE Generation Ltd) v Competition and Markets Authority [2022] EWCA Civ 1472

This is one of the most relevant cases for crisis-time market rule overrides.

The case concerned GEMA's approach to a charging regime that was not legally compliant. The Court of Appeal considered the regulator's powers and duties when dealing with a situation in which an existing regulatory system did not comply with the law. (Bailii)

The case is particularly important because it demonstrates that a regulator cannot simply ignore legal requirements because a practical problem exists.

Where temporary arrangements are necessary, the regulator must still consider:

the statutory framework;

the limits of its powers;

the need to restore legal compliance; and

the interests of affected market participants.

This provides a strong legal principle for crisis-time overrides:

Urgency may justify rapid action, but urgency does not remove legality.

8. Emergency Pricing

Emergency interventions can also affect electricity prices.

During system stress, balancing actions may be extremely expensive.

The BSC includes the concept of Value of Lost Load (VoLL) in imbalance-price calculations. Ofgem has noted that the administratively set BSC VoLL is currently £6,000/MWh, although this does not operate as a simple ceiling on the system operator's balancing actions. (Ofgem)

This illustrates an important principle:

Emergency market rules may change how scarcity and emergency actions are reflected in settlement prices.

9. Consumer and Supplier Protection

A crisis override can have substantial financial consequences.

For example, changing settlement rules may cause:

higher costs for suppliers;

different payments to generators;

changes in imbalance charges;

redistribution of balancing costs; or

unexpected consumer costs.

Therefore, regulators should assess the consequences of an override for all affected participants.

A temporary emergency measure should not become an uncontrolled transfer of wealth between market participants.

10. Proportionality and Time Limits

A good crisis override should normally be:

Necessary

There must be a genuine crisis or urgent regulatory problem.

Proportionate

The intervention should go no further than necessary.

Temporary

It should remain in force only while the exceptional circumstances justify it.

Reviewable

Authorities should reassess whether it remains necessary.

Transparent

The reasons should be explained as far as commercially and operationally possible.

These principles reduce the risk of emergency powers becoming permanent market distortions.

11. Example: Emergency Interconnector Action

Imagine that a major generator unexpectedly fails during peak demand.

The system operator determines that domestic reserves are insufficient.

An interconnector with a neighbouring electricity system could provide additional electricity.

Under ordinary arrangements, the flow may be determined through established market processes. During a serious emergency, however, an Emergency Instruction may be necessary.

The legal question becomes:

Does the applicable regulatory framework give the system operator authority to take this emergency action, and how should the resulting costs and energy be settled?

This demonstrates why emergency operational powers and settlement rules must be designed together.

12. Market Integrity

Overrides must not create opportunities for market manipulation.

Participants should not be able to use an emergency mechanism simply to obtain an unfair commercial benefit.

Regulators therefore need safeguards concerning:

eligibility;

emergency declarations;

documentation;

dispatch instructions;

settlement;

reporting; and

post-event investigation.

Where emergency actions affect wholesale prices, market-abuse rules remain relevant.

13. Judicial Review and Accountability

Market participants affected by an emergency decision may challenge regulatory action.

Courts can examine whether the authority:

acted within its legal powers;

followed the correct procedure;

considered relevant matters;

avoided irrelevant considerations; and

reached a legally defensible decision.

The SSE Generation v CMA case is especially useful here because it illustrates judicial scrutiny of a regulator dealing with an unlawful or defective regulatory arrangement. (Bailii)

14. Modern Examples of Urgent Rule Changes

Current Ofgem decisions demonstrate that urgent modifications remain part of electricity-market governance.

For example, in 2026:

P511 was approved urgently to address eligibility boundaries for certain generation participation arrangements. (Ofgem)

P507 received urgent treatment because of potential commercial impacts associated with settlement arrangements. (Ofgem)

CMP474 and CMP475 received urgent treatment concerning BSUoS tariff-setting and reset arrangements. (Ofgem)

These examples show that an urgent regulatory pathway can be used when delay itself could create significant market or consumer consequences.

15. Key Legal Principles

Crisis-time market rule overrides should therefore follow five principles:

1. Legal authority
There must be a statutory or valid regulatory basis.

2. Necessity
The override should respond to a genuine crisis or urgent risk.

3. Proportionality
Only the necessary rules should be modified.

4. Temporary character
The normal market framework should return when possible.

5. Accountability
Decisions should be documented and open to appropriate regulatory or judicial review.

16. Conclusion

Crisis-time market rule overrides allow electricity authorities to respond quickly when ordinary market arrangements cannot adequately protect system security or market functioning.

They may involve emergency dispatch, interconnector instructions, balancing interventions, accelerated BSC modifications or temporary settlement changes. However, emergency circumstances do not eliminate the rule of law.

The most important case is SSE Generation Ltd v Competition and Markets Authority [2022] EWCA Civ 1472, which demonstrates the importance of regulatory legality when authorities deal with defective or non-compliant arrangements. (Bailii)

Recent Ofgem decisions on urgent BSC and CUSC modifications also show that urgency is itself subject to defined regulatory procedures. (Ofgem)

For PhD-level energy-law analysis, the central principle is:

A crisis may justify faster and exceptional regulatory action, but it does not justify unrestricted departure from the law.

A well-designed framework therefore combines emergency flexibility with statutory authority, proportionality, transparency, market integrity and post-crisis review.