For UK heat network operators preparing for Ofgem authorisation.
Everything you need to know before January 2027.
Plain-English walkthroughs of Ofgem’s authorisation framework under the Market Framework Regulations 2025. Read top to bottom, or jump to what you need.
Start here
Orientation for operators new to heat network regulation.
- What is heat network compliance?An overview of Ofgem authorisation and what it means for every operator in Great Britain.
- The Market Framework Regulations 2025What the regulations actually require, what changed, and what operators must do to comply.
- Ofgem compliance: the authorisation conditionsWhat Ofgem heat network compliance requires, condition by condition, and the record that evidences each one.
- Frequently asked questionsShort answers to the questions operators ask most, linked to the full guides.
- GlossaryPlain-English definitions of the key heat network compliance terms.
Meeting the conditions
What Ofgem needs to see in each evidence area. One guide per condition.
- Financial resilience statementsWorking capital, insurance, contingency funding and the evidence Ofgem expects.
- Supply continuity plansPlanned outages, emergency response, consumer notification, and step-in arrangements.
- Compliant billingWhat Ofgem’s model bill requires on every consumer invoice.
- Fair pricing (A6 and A7)What Ofgem’s fair pricing and cost allocation conditions require, and how to evidence them.
- Complaints handling (B4)What a compliant complaints procedure must do, and the log that evidences it.
Registration & operations
Submitting to Ofgem, and which teams own which documents.
- How to register with OfgemStep-by-step through the authorisation registration process.
- HNTAS complianceThe Heat Network Technical Assurance Scheme, the TS1 standard, who it applies to and when, and how to prepare.
- Ofgem data reportingEvery quarterly and annual data point required under authorisation condition A9, the submission windows, and who is exempt.
- Document responsibilitiesA RACI breakdown across compliance, finance, operations, customer services, and senior management.
Latest updates
Ongoing summary of material regulatory developments across the UK nations.
- Recent regulatory developmentsHNTAS progress, GHNF funding, devolved nations licensing, and Ofgem’s digital registration platform.
- Heat network regulation in Northern IrelandNorthern Ireland is building its own framework under the Utility Regulator. The proposed authorisation regime, what is in scope, and what operators should do now.