Britain’s electricity system is changing quickly. As fossil fuel generation falls and low-emission power takes a larger role, the grid will need more assets that can respond when supply and demand move out of balance.
In April 2026, fossil fuel generation on Britain’s grid fell below 1 GW for the first time. That is an important signal for investors because it shows how far the system has moved from traditional baseload power. Wind, solar, batteries, interconnectors and flexible generation are now doing more of the work. The result is a power market where reliability, responsiveness and timing matter more.
The UK still needs dependable electricity when renewable output is low or demand rises sharply. A system with more weather-dependent generation needs firm, flexible capacity alongside it. Assets that can generate or store power when the grid needs support are likely to become more important as the energy transition continues.
Energy security is also part of the picture. Recent disruption in oil and LNG markets has shown the risk of relying too much on imported fossil fuels. That supports the case for domestic power assets that can reduce exposure to volatile global fuel markets. Low-carbon generation, storage and flexible grid support are not just environmental themes. They are increasingly linked to resilience and national energy strategy.
The growth of AI data centres adds to the pressure. Government forecasts referenced in the analysis suggest Britain will need at least 6 GW of AI-capable data centres by 2030. Around 140 proposed data centre projects are also seeking about 50 GW of grid connections.
Data centres that can reduce demand during tight periods, or use more electricity when the system has spare capacity, could help lower strain on the grid. This makes demand flexibility an investment theme in its own right. It also supports the case for storage, pumped hydro and other assets that can absorb surplus power and release it when needed.
Drax Group plc (LON:DRX), trading as Drax, is a power generation business. The principal downstream enterprises are based in the UK and include Drax Power Limited, which runs the biomass fuelled Drax power station, near Selby in North Yorkshire.
