Ofgem, the Office of Gas and Electricity Markets, is a non-ministerial government department and an independent National Regulatory Authority, recognized by EU Directives. It plays a crucial role in regulating the electricity and gas markets in Great Britain, ensuring that consumers receive a fair deal and that the energy market operates efficiently and sustainably.

Ofgem's mission is to protect the interests of existing and future electricity and gas consumers. It does this by promoting competition, encouraging innovation, and ensuring that the energy market is fair and transparent. Ofgem also works to ensure that the UK meets its carbon reduction targets and that the energy system is resilient and secure.

In terms of sustainability, Ofgem is committed to supporting the transition to a low-carbon energy system. It has implemented various initiatives to promote renewable energy sources and improve energy efficiency. Ofgem's regulatory framework encourages energy companies to reduce their carbon emissions and invest in sustainable technologies. However, as a regulatory body, Ofgem's direct sustainability impact is more about enabling and enforcing sustainable practices within the energy sector rather than implementing them directly.

Ofgem publishes annual reports detailing its performance and the progress of the energy market towards sustainability goals. These reports include information on carbon emissions, energy efficiency improvements, and the integration of renewable energy sources into the grid. Ofgem also collaborates with other government bodies and stakeholders to develop policies that support the UK's climate goals.