How many authorisation conditions are there for heat networks?

The conditions are organised into three groups: registration and financial resilience, consumer protection and billing, and security of supply and technical standards. Together they cover registration and governance, consumer-facing arrangements, and the technical standards that apply to network operation.

What evidence does Ofgem require for each authorisation condition?

Ofgem requires structured documentary evidence for each condition, not just policy statements. This means completed registers, signed plans, working billing structures, and operational logs. The evidence layer is what Ofgem audits – operators who have the right operational practices but lack formal documentation are at risk of failing conditions they are already meeting in practice.

What is the fit and proper assessment for heat network operators?

Ofgem's fit and proper assessment evaluates whether the individuals responsible for operating a heat network are suitable to hold an authorisation. This covers financial standing, relevant experience, and absence of disqualifying factors. Evidence of staff competence and training records supports this assessment.

What happens if an operator fails an authorisation condition?

Ofgem can issue enforcement notices, financial penalties, and ultimately revoke an operator's authorisation. Operating without authorisation after 27 January 2027 is a criminal offence. Conditions can also be assessed during routine audits after initial registration, so ongoing compliance matters beyond the registration deadline.

Which authorisation conditions apply to small heat network operators?

The full set of authorisation conditions applies regardless of network size. Small operators meet the same requirements as large ones, though evidence can be proportionate to network scale. Smaller teams often have less dedicated compliance resource, which makes pre-built professional documents a practical solution.

Ofgem Heat Network Authorisation Conditions Explained

Key points

Authorisation covers consumer protection, financial resilience, supply continuity, data reporting, and technical standards
Operators must demonstrate compliance through documentary evidence, not just policy statements
The Compliant Bundle covers all eight core document requirements

Most operators, when they first look at Ofgem’s authorisation conditions, underestimate the documentary evidence required. It is not enough to have policies in place – Ofgem wants structured documents that prove compliance across consumer protection, financial resilience, supply continuity, data reporting, and technical standards. Every operator supplying heat to consumers in Great Britain must meet these conditions by 27 January 2027.

Registration is declarative: under Ofgem’s Registration Guidance, operators register the heat networks they operate and the role they hold. Ofgem opens the registration service in Spring 2026; the operator role registers first, with suppliers invited to register against an already-registered network shortly after. This guide covers each condition area, what evidence Ofgem expects to see, and where operators typically find the biggest gaps.

Heat network riser with insulated pipework and isolation valves

Consumer protection conditions

Operators must demonstrate concrete arrangements that protect consumers. This means transparent billing meeting Ofgem’s model bill requirements, a formal complaints procedure with escalation to the Energy Ombudsman after eight weeks, a Consumer Welcome Pack issued to every new consumer at first supply, and a Priority Services Register identifying and supporting vulnerable customers.

These are not aspirational policies. They are enforceable conditions. Ofgem can issue compliance orders, impose financial penalties, and in serious cases revoke authorisation entirely. If you do not have a compliant bill format, a formal welcome pack, or a functioning PSR, you have gaps that will surface during assessment.

Financial resilience conditions

Operators must demonstrate they can sustain operations financially. This means documenting adequate working capital, appropriate insurance cover, emergency funding arrangements, and any relevant regulatory history. Ofgem needs confidence that an operator will not become insolvent and leave consumers without heating.

A structured Financial Resilience Statement is typically how operators evidence this. It is not the same thing as submitting your annual accounts – Ofgem wants forward-looking assertions about financial preparedness, not a backward-looking P&L. Our financial resilience guide covers what to include in detail.

Most common gaps. Consumer protection (no formal welcome pack, no PSR, no compliant bill format) and financial resilience (no structured statement beyond management accounts) are where most operators find the biggest gaps at first assessment.

Supply continuity conditions

Operators must have documented contingency arrangements for maintaining heat supply during disruption. This covers planned maintenance, emergency response, communication with consumers during outages, and – critically – step-in procedures for when the operator can no longer supply heat.

Step-in is the section Ofgem reads most carefully. If you cannot show a credible arrangement for who takes over when things go wrong, your application will stall. Our supply continuity guide covers what Ofgem scrutinises and how to structure the plan.

Data reporting conditions

Ofgem requires periodic reporting from authorised operators. Quarterly submissions cover consumer numbers, new connections, and complaints data. Annual submissions cover financial performance, interruptions, PSR usage, and consumer satisfaction.

Technical standards (HNTAS)

The Heat Network Technical Assurance Scheme sets phased requirements for network condition, metering accuracy, water treatment, and supply reliability. The draft technical standard (TS1) was published in November 2025 and the HNTAS consultation closed in April 2026, with the scheme expected to launch in 2027.

Not all requirements apply from day one – existing networks get staged milestones. But waiting until launch to start assessment is a mistake. Operators who understand their network’s baseline position now will be far better placed when mandatory certification begins.

Water treatment dosing equipment in a plant room

Scotland

Scottish operators face dual compliance: the Heat Networks (Scotland) Act 2021 licensing regime and the Market Framework Regulations 2025 (as amended by SI 2026/7, in force 7 January 2026). The authorisation conditions under the Market Framework apply across Great Britain, but Scottish operators must also satisfy the separate Scottish Government licensing requirements.

Preparing your evidence

Start by mapping the conditions against your current documentation. Many operators find significant gaps when they first assess their position – particularly around consumer protection and financial resilience, where informal practices need to become formal, structured documents.

Ofgem’s heat networks regulatory page has the authorisation conditions and registration guidance. Heat Network Compliance Hub offers all 14 documents needed for authorisation, individually or in bundles from £495, with a bundle comparison table on our pricing page.

What are the Ofgem heat network authorisation conditions?