In February 2026, the UK Government confirmed that regulatory responsibility for heat networks in Great Britain has transferred from the Office for Product Safety and Standards (OPSS) to the Office of Gas and Electricity Markets (Ofgem). For many landlords, managing agents and heat suppliers, this change has created uncertainty around compliance obligations under the Heat Network Regulations 2014. This update answers the most common questions about what has changed, who is in scope, and what you need to do to remain compliant under the new regulatory framework.