Electricity domain
Who runs Britain's energy system?
Regulators, grid operators, government departments, generators, suppliers, and consumer advocates — understand what each body does and how it affects your household.
Governance framework
Decision rights, industry codes, and the policy processes that determine how the energy system is run and changed.
Market participants
How generators, suppliers, traders, and flexibility providers interact through wholesale markets, contracts, and balancing mechanisms.
Live system data
Real-time generation mix, demand, frequency, carbon intensity, and interconnector flows across the GB system.
System architecture
Six layers of physical infrastructure, from generation through transmission and distribution to the meters in your home.
Methodology and sources
Last reviewed: 17 March 2026
This hub links to detailed pages on each category of energy system participant. Roles and responsibilities drawn from Ofgem licence conditions, NESO publications, DESNZ organisational records, and Citizens Advice reports.