Governance
How do energy system decisions get made?
Six decision areas shape the GB energy system. Each has a lead body, an assurance mechanism, and a set of executors. Understanding who holds decision rights is the first step to understanding why things move slowly and where accountability sits.
Who leads, who assures, who executes?
The GB energy system distributes decision-making across government departments, regulators, system operators, and industry bodies. No single organisation holds all the cards. Click any cell in the table below to see a detailed explanation of that role.
| Decision area | Lead | Assurance | Execution | Timescale |
|---|---|---|---|---|
| Network planning | NESO | Ofgem | TOs, DNOs | 3-7 years |
| Market design | DESNZ, Ofgem | CMA | Elexon | 2-5 years |
| Operational dispatch | NESO | Ofgem | Generators | Seconds to minutes |
| Carbon policy | DESNZ | CCC | Ofgem, NESO | 5-year budgets |
| Consumer protection | Ofgem | Citizens Advice | Suppliers | Quarterly cap review |
| Connections reform | Ofgem, NESO | DESNZ | TOs, DNOs | 9-24 months |
Why do code modifications take so long?
Every significant change to the GB energy system's operating rules must pass through a six-step process: proposal, workgroup assessment, industry consultation, panel vote, Ofgem decision, and implementation. Each step has statutory or contractual timescales, and none can be skipped.
Workgroups typically run for three to nine months as industry representatives debate the proposal's merits and potential side-effects. Consultation adds another three to six months. Panel votes and Ofgem decisions can take months more, particularly if the modification is contentious or interacts with other pending changes. End to end, a significant code modification takes 18 to 36 months. Urgent modifications exist in theory, but they are rarely used and still take several months.
What happens when governance blocks delivery?
Consider a solar farm. The panels can be manufactured, shipped, and installed in about nine months. But if the project requires a code change to connect, or if the connection queue is blocked by outdated rules, the wait stretches to three years or more. The technology is ready. The capital is available. The planning consent may already be granted. The bottleneck is governance.
This is not a hypothetical. The connections queue in 2025 contained over 700 GW of projects, many of which were speculative applications that clogged the system because the rules did not distinguish between serious and speculative proposals. Connections reform started in 2020. It will not finish until 2027 at the earliest.
How does the governance cycle work?
Energy governance should work as a continuous cycle: rules are written, plans are made, operations run, markets clear, consumers are served, evidence is gathered, improvements are designed, and rules are updated. In practice, the loop rarely completes. Click any stage to see more detail.
The governance cycle should complete continuously. In practice, stages 6 (Evidence) and 7 (Improve) are chronically underfunded, so the loop rarely closes.
Can governance keep up with Clean Power 2030?
The government has committed to a fully decarbonised electricity grid by 2030. The governance framework was not designed for that pace of change.
Clean Power 2030 requires new generation capacity, grid reinforcement, storage deployment, and market reform to be delivered within roughly four years from now. The typical code modification process takes two to three years. These timescales are fundamentally incompatible.
A single BSC modification to change settlement rules can take 30 months from proposal to implementation. A Grid Code change to accommodate new technology types can take 24 months. If Clean Power 2030 requires changes to both codes, plus CUSC, plus DCUSA, the governance queue alone could consume most of the remaining delivery window.
Ofgem and DESNZ have recognised this problem. The Energy Code Reform programme aims to consolidate codes and accelerate modification processes. But code reform itself is subject to the same governance constraints it is trying to fix. The programme was announced in 2022 and is not expected to deliver structural change before 2027.
The question is not whether the technology can be built in time. It can. The question is whether the rules can be changed fast enough to let it connect.
Methodology and sources
Last reviewed: 17 March 2026. Decision rights are derived from statutory responsibilities, licence conditions, and published governance frameworks. Code modification timescales are based on historical averages from code administrator reporting.
| Source | Description |
|---|---|
| Ofgem supply and generation licences | Statutory framework for decision rights, consumer protection obligations, and regulatory powers. |
| DESNZ policy statements | Government policy direction on carbon targets, market design, and energy security strategy. |
| NESO statutory responsibilities (ESO Licence) | System operation, network planning, code administration duties, and future energy scenarios. |
| Elexon, NESO, RECCo code administrator data | Modification timelines, panel decisions, consultation records, and implementation tracking. |
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Who decides what
Map the actors, their mandates, and their overlapping jurisdictions across the energy system.