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Maggie Burns, Associate
Steve Gummer, Partner
Since coming into force in January 2026, Ofgem’s General Authorisation Conditions (the “Conditions”) have introduced a comprehensive regulatory framework and fundamentally changed the regulatory landscape for heat networks.
Now, a few months into implementation, attention is beginning to shift from understanding the rules to how they operate in practice. Early experience suggests that the regime is both ambitious in scope and flexible in design, but that this flexibility can give rise to some practical challenges when applied across a diverse range of delivery models.
This article highlights some of the key themes emerging as the sector begins to engage with the new framework.
A defining feature of the Conditions is their reliance on principles rather than prescriptive rules.
Core obligations, such as requirements to ensure pricing is fair and not disproportionate, or to act in a responsible manner, are deliberately framed in broad terms. This reflects the reality that heat networks are delivered through a wide variety of structures, including landlord-led schemes, concession arrangements and ESCo models.
This flexibility is a clear strength of the regime. It allows the framework to:
· accommodate different delivery models;
· adapt to project-specific characteristics; and
· evolve alongside the sector.
At the same time, it means that compliance will often turn on interpretation and judgement, particularly in the absence of fixed thresholds or bright-line tests. As a result, the practical application of the regime is likely to develop over time as market practice and regulatory expectations become more established.
The Conditions are supported by a substantial body of Ofgem guidance, which plays an important role in explaining how the regime is intended to operate.
In practice, the framework operates as a combination of:
· binding conditions; and
· supporting guidance setting out expected approaches and good practice.
This structure provides helpful context and flexibility, particularly in a developing sector. It allows expectations to be refined over time without the need for formal legislative change.
However, it also means that, in some areas, there is often a gap between minimum compliance and emerging best practice. For regulated entities, this can require careful consideration of:
· how closely to align with guidance in practice;
· how to evidence compliance where requirements are principles-based; and
· how those expectations may shift as the regime settles in.
Engagement with both the Conditions and the guidance will therefore be an important part of ongoing compliance.
The fair pricing requirement sits at the heart of the regime and reflects the particular characteristics of heat networks, where consumers typically do not have the option to switch supplier.
The framework introduces a structured approach to assessing fairness, based on a combination of overarching objectives, supporting principles and intended outcomes.
At its core is the objective that consumers pay fair and not disproportionate prices. This is supported by principles such as cost-reflective pricing, cost efficiency, fair and reasonable returns, consumer impact, regulatory control and price transparency and assessed by reference to a range of outcomes, including consumer and industry outcomes.
This approach provides a flexible mechanism for addressing a wide range of pricing scenarios and business models.
At the same time, the absence of fixed benchmarks or caps means that pricing assessments are inherently context specific. In practice, this places particular emphasis on:
· transparency of methodology;
· quality of supporting evidence; and
· comparability with other schemes where appropriate.
Over time, as more data becomes available, there may be greater clarity on how these principles are applied across the sector.
One of the more complex areas in practice is how the regime applies across different charging structures, particularly where heat costs are not presented as a standalone bill.
In some models, charges are recovered through:
· rent; or
· service charges,
rather than through a discrete heat tariff.
The regime recognises these arrangements and seeks to apply the same underlying principles of fairness and transparency. However, in practice, applying those principles tend to be easier to apply where:
· there is a clearly identifiable charge for heat; and
· billing information is structured around that charge.
Where charges are more integrated into wider housing costs, additional measures may be needed to demonstrate that:
· consumers are able to understand what they are paying for heat;
· the basis of calculation is sufficiently transparent; and
· compliance can be clearly demonstrated.
As the regime settles in, approaches to achieving this transparency are likely to continue to develop.
The Conditions introduce more structured expectations around heat supply contracts, including requirements for clarity, accessibility and transparency.
In practice, however, heat supply arrangements often sit within a broader legal context, including:
· leases;
· tenancy agreements; and
· service charge mechanisms.
The regime accommodates this by recognising that these documents can constitute the relevant “heat supply contract”.
While this also provides flexibility, it also means that:
· contractual arrangements may not always follow a standardised format;
· different legal frameworks may apply in parallel; and
· the consumer experience may vary depending on the delivery model.
As a result, ensuring consistency of information and accessibility for consumers can require careful coordination across different documents and obligations.
A key feature of heat network regulation is that it operates alongside a number of existing legal frameworks, including housing law and consumer protection legislation.
The Conditions build on these frameworks rather than replacing them. This creates a multi-layered regulatory environment, where:
· different rules apply depending on the structure of the scheme;
· responsibilities may be shared across multiple parties; and
· compliance requires consideration of overlapping obligations.
This is not unusual for infrastructure projects with strong links to housing and consumer services. However, it does mean that navigating the regime in practice may involve engaging with multiple sources of regulation.
The introduction of the Conditions represents a significant step forward for the regulation of heat networks, establishing a consistent framework focused on fairness, transparency and consumer protection.
Early experience suggest that the regime has been designed to be flexible and adaptable, reflecting the diversity of the sector. That flexibility is likely to support innovation and accommodate different delivery models.
At the same time, it means that some aspects of the regime will continue to develop as it is tested in practice, particularly where:
· principles-based requirements need to be applied in complex real-world scenarios;
· different legal frameworks intersect; and
· approaches to transparency and pricing are refined over time.
As the sector gains more experience under the new framework, greater clarity is likely to emerge through a combination of guidance, market practice and regulatory engagement.
Written by Maggie Burns, Associate and Steve Gummer, Partner
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