To understand the digital architecture required, it is first necessary to understand the ecosystem of actors that must be connected. The UK energy system involves a complex web of organisations, each with distinct roles, responsibilities, and digital requirements.
2.1 The Principal Actors
The table below maps the nine principal actor types in the UK energy system, their roles, and their digital requirements. The breadth and heterogeneity of this ecosystem — spanning bulk generation to behind-the-meter consumer assets — underscores the scale of the interoperability challenge.
2.2 The Digital Gap
The digital gap between the current state and the required future state is substantial. Today, the UK energy system is characterised by five systemic failures.
Siloed Data Systems. Each actor in the energy system typically operates its own proprietary data systems, with limited interoperability. Data sharing between organisations is often manual, slow, and error-prone. The Data Communications Company (DCC), which operates the smart meter communications infrastructure, provides a partial solution for consumer-side data, but its scope is limited and its architecture is not designed for the real-time, bi-directional data flows required by a flexible energy system.
Fragmented Standards. The energy sector is characterised by a proliferation of standards, many of which are overlapping, inconsistent, or incompatible. The IEC Common Information Model (CIM), the IEC 61850 substation automation standard, and the IEC 62325 energy market standards each address different parts of the energy system, but they are not always implemented consistently or in a way that enables seamless interoperability.
Pilot Programme Proliferation. The UK energy sector has a strong culture of innovation and experimentation, but this has resulted in a landscape of hundreds of pilot programmes, many of which are not designed to scale or to interoperate with other initiatives. As Mike Hewitt has observed, the sector needs "an operating system, NOT another pilot."
Governance Gaps. There is currently no single body with the authority and mandate to coordinate the digital architecture of the UK energy system as a whole. Ofgem regulates the sector, NESO operates the national system, and BSI facilitates standards development, but none of these organisations has the specific mandate to act as a digital architecture authority for the entire energy ecosystem.
Security Vulnerabilities. The increasing digitalisation of the energy system creates new cybersecurity risks. The energy system is Critical National Infrastructure (CNI), and a cyberattack on its digital systems could have catastrophic consequences. Yet many of the digital systems currently being deployed in the energy sector were not designed with CNI-grade security in mind.
Principal Actors in the UK Energy System
| Actor | Role | Digital Requirements |
|---|---|---|
| NESO | National Energy System Operator; responsible for whole-system planning, operation, and market facilitation | Real-time visibility of all generation and demand assets; data sharing with all market participants; digital twin of the entire energy system |
| DNOs / DSOs | Distribution Network Operators transitioning to Distribution System Operators; manage the local distribution network | Real-time monitoring and control of distribution networks; coordination of local flexibility markets; data sharing with NESO and aggregators |
| Generators | Large-scale power stations, wind farms, solar parks, and other generation assets | Secure, standardised interfaces for dispatch instructions, metering data, and market participation |
| Aggregators / VPPs | Companies that pool the flexibility of distributed assets into Virtual Power Plants; participate in balancing and flexibility markets | Access to real-time data from behind-the-meter assets; standardised APIs for market participation; interoperability with NESO and DSO systems |
| SSES Providers | Providers of Smart Secure Energy Systems; responsible for managing the smart meter communications infrastructure and consumer energy management | Secure, standardised protocols for device communication; interoperability with DCC and consumer platforms |
| SLES Operators | Operators of Smart Local Energy Systems; manage local energy communities and microgrids | Interoperability with DNO/DSO systems; access to local market platforms; data sharing with NESO |
| Retailers | Energy suppliers that sell electricity and gas to consumers | Access to half-hourly settlement data (MHHS); interoperability with consumer energy management platforms; APIs for tariff and demand response products |
| Behind-the-Meter Coordinators | Companies that manage consumer-side assets, including EV chargers, heat pumps, batteries, and smart appliances | Standardised device APIs; access to grid signals; interoperability with aggregators and retailers |
| Consumers / Prosumers | Households and businesses that generate, store, and consume energy | Simple, secure interfaces for controlling their assets and participating in energy markets |