Decarbonisation Technology November 2026 issue

Grid flexibility: The UK’s most overlooked clean power tool Unlocking the potential of grid flexibility for sustainable energy by balancing supply and demand in the UK’s clean power future

Enel X

T he UK has set itself one of the most ambitious clean power targets in the world: by 2030, at least 95% of its electricity generation should come from low- carbon sources. However, achieving this requires a massive expansion of renewable capacity, and generation is only half the story. A grid powered by widely distributed renewable sources, rather than traditional centralised power stations, needs to balance supply and demand in real time across millions of connected assets. Variable levels of wind and sun translate into variable supply and create the need for demand that can be varied in response. This is demand flexibility in a nutshell: the ability to intentionally adjust consumers’ use of electricity to help balance the grid. However, the UK does not have nearly enough flexible capacity. The government’s Clean Flexibility Roadmap calls for 51-66 GW by 2030, which is two or three times what was available in 2023. Much of the conversation around flexibility in the UK centres on the Capacity Market, which pays organisations to release capacity at peak demand, either by generating electricity or by ‘turning down’ processes and reducing demand. This demand response market has been operating for 12 years. However, it is just one tool in a much larger toolbox. The real opportunity for participants lies in combining it with all the other flexibility mechanisms. What flexibility means Grid flexibility goes beyond demand response to encompass frequency response, wholesale market trading, the balancing mechanism, and a growing number of ancillary services. Each represents a different way for energy assets

– whether they are generating, storing, or consuming electricity – to respond to what the grid needs at any given moment. Each programme generates value for participants, typically offering payments for an enrolled capacity regardless of whether that capacity is actually called on. Realising the maximum value means enrolling an asset in several mechanisms at the same time. This value-stacking principle is at the heart of the Virtual Power Plant (VPP) model, which Global insight: The Clean Flexibility Roadmap To support its goal of delivering 95% clean electricity by 2030, the UK government launched the Clean Flexibility Roadmap. While traditional grids rely on predictable, centralised power stations, a renewables- heavy grid depends on the weather, meaning supply fluctuates constantly. Instead of trying to adjust electricity generation to meet demand, the UK is adjusting demand to match generation. The goal: Rapidly scale the UK’s flexible energy capacity to 51-66 GW by 2030. Beyond the capacity market: Rather than relying solely on large industries turning down power during peak hours, the strategy integrates a vast, interconnected ecosystem. The strategy: The roadmap unlocks capacity from millions of distributed assets by combining industrial demand response with consumer-led flexibility (smart EV charging and home batteries), grid-scale battery storage, and cross-border interconnectors.