Roles and responsibilities
We are the independent system operator and planner established under the Energy Act 2023. We operate today’s electricity system and design tomorrow’s energy system.
Our role is to help deliver a reliable, clean and affordable energy system for Great Britain.
How we work with government and the regulator
We work closely with the Department for Energy Security and Net Zero (DESNZ) and Ofgem. We each have different roles and make our own decisions. Together, we share evidence and expertise to help deliver a reliable, clean and affordable energy system for Great Britain.

How we work with DESNZ
DESNZ sets the policy and regulatory framework for the energy sector in Great Britain, aligned with wider government priorities. Its strategic priorities are set out in their Strategy and Policy Statement. We provide independent advice, analysis and evidence to help inform DESNZ’s policy and decision-making. We also have a role in implementing government policy decisions that fall within NESO’s remit.
Find out more about DESNZ’s role and responsibilities.
How we work with Ofgem
Ofgem regulates NESO through our electricity system operator and gas system planner licences and associated guidance holding us to account for the cost, quality and timeliness of our delivery. We work closely with Ofgem, sharing evidence, analysis and expertise to support effective regulation and decision-making. We maintain a collaborative relationship while respecting our respective statutory responsibilities and independence.
Find out more about Ofgem’s role and responsibilities.
