These Regulations amend the Heat Networks (Market Framework) (Great Britain) Regulations 2025 (the “2025 Regulations”). The 2025 Regulations provide for persons carrying on a “regulated activity” in relation to heat networks to be required to hold a “heat network authorisation” conferred by the Gas and Electricity Markets Authority (“Ofgem”). Those with heat network authorisations are referred to as “authorised persons”. The amendments provide for the following—