What the Heat Networks Market Framework Regulations 2025 mean for operators

Until 2025, heat networks in Great Britain operated largely outside the regulatory framework that governs gas and electricity suppliers. Operators had obligations under the Heat Network (Metering and Billing) Regulations 2014, but there was no licensing regime, no formal consumer protection framework, and no regulator with enforcement powers.

The Heat Networks (Market Framework) (Great Britain) Regulations 2025 changed this fundamentally. Made under powers conferred by the Energy Act 2023, these regulations establish Ofgem as the dedicated regulator for heat networks and introduce a comprehensive authorisation regime that applies to every operator and supplier in England, Scotland, and Wales.

Why regulation happened now

The Competition and Markets Authority recommended regulation of the heat network sector in 2018, following a market study that found consumers on heat networks lacked the protections available to gas and electricity customers. The Energy Act 2023 gave the Government the legislative framework to act, and the Market Framework Regulations 2025 deliver the implementation.

There are over 14,000 heat networks in the UK, serving more than 480,000 consumers. Many of these consumers had no formal complaints process, no transparent billing requirements, and no regulator to turn to if things went wrong. The regulations bring heat network consumers broadly into line with the protections available in other regulated energy markets.

The timeline operators need to know

The regulatory timeline has several key dates that operators must be aware of. The Energy Ombudsman became the official dispute resolution body for heat network consumers on 1 April 2025. On the same date, all existing operators and suppliers received deemed authorisation automatically – meaning they are authorised to continue operating without a formal application, provided they were already active before that date.

The authorisation conditions came into effect on 27 January 2026. From that date, all authorised entities – including those with deemed authorisation – are bound by the conditions and Ofgem has enforcement powers. The digital registration service launched in spring 2026, and operators must complete their registration by 26 January 2027.

What the authorisation conditions require

Ofgem published 26 authorisation conditions in January 2026, organised into three groups. Group A covers registration, governance, and financial responsibility. Group B covers consumer protection, billing, complaints, and vulnerable consumers. Group C covers security of supply and technical standards.

In practical terms, operators need to demonstrate that they have registered their networks and nominated an operator where multiple entities are involved, that they can evidence financial resilience and continuity arrangements, that their billing meets transparency requirements with specific mandatory fields on every consumer bill, that they have a complaints procedure that includes escalation to the Energy Ombudsman, that they maintain a Priority Services Register for vulnerable consumers, and that they have a supply continuity plan in case of disruption or operator failure.

Our authorisation conditions guide breaks down every condition area with the specific evidence operators need to prepare.

What changed from previous regulations

The 2014 Metering and Billing Regulations required operators to install meters and provide basic billing information. The Market Framework Regulations go significantly further. Operators now need formal authorisation to operate. Ofgem can impose financial penalties for non-compliance and can ultimately revoke authorisation. Operating without authorisation is a criminal offence. Consumer protection requirements are substantially more detailed, covering billing transparency, complaints handling, back-billing limits, heat supply contracts, and protections for consumers in vulnerable situations.

The 2025 Amendment Regulations and the 2026 Amendment Regulations extended the framework further. Air-conditioning-only communal networks were excluded from regulation. The scope of authorisation conditions was broadened to cover fair pricing and disproportionate charges. A special administration regime was introduced as a regulatory backstop for operator insolvency – similar to the regime that already exists for gas and electricity suppliers. Authorised persons must now also have deemed contracts with consumers where no formal supply agreement exists.

Who is affected

The regulations apply to anyone carrying out a regulated activity on a heat network in Great Britain. There are two regulated activities: operation (controlling and maintaining the transfer of thermal energy) and supply (holding the contractual relationship with end consumers for heating, cooling, or hot water). Both district networks (serving multiple buildings) and communal networks (serving separate premises within a single building) are captured.

Some networks are exempt. Houses in multiple occupation where heating is provided through a shared domestic system, converted buildings with shared heating, and third-party waste heat producers are excluded. Air-conditioning-only communal networks were also excluded by the 2025 Amendment Regulations.

What operators should be doing now

If you have not started preparing, the registration deadline of 26 January 2027 is closer than it appears. Registration itself requires detailed information about your networks, your governance structure, your financial position, and your consumer protection arrangements. Ofgem will check this information – registration is not a rubber stamp.

The practical preparation involves assembling documentation that demonstrates compliance with each relevant authorisation condition. For most operators running one to three networks, this means producing a readiness assessment, a financial resilience statement, a supply continuity plan, compliant billing documentation, a consumer welcome pack, a priority services register, and operational tracking registers for reporting, training, and complaints.

Our registration checklist organises every document by operational area with priority order, and our compliance bundles provide the complete documentation set.

Enforcement and penalties

Ofgem has the same enforcement toolkit for heat networks as it does for gas and electricity. This includes compliance orders, financial penalties, and ultimately revocation of authorisation. The Government estimated compliance costs to the sector at £71 million initially, with ongoing maintenance costs of £52 million – a clear signal of the scale of change expected.

For smaller operators, the most immediate risk is not penalties but failing to register by the deadline. After 26 January 2027, operating without registration is a regulatory breach. The practical consequence is that Ofgem can require you to stop operating until you are compliant – which for a heat network means consumers lose their heating.