United Kingdom: how ENGIE is contributing to the energy transition
ENGIE develops and operates low-carbon energy solutions in the United Kingdom across the entire value chain: production, flexibility and storage.. We support B2B customers, including businesses, local authorities and energy system stakeholders, in reducing their carbon footprint.
business customers in the United Kingdom
of low-carbon electricity capacity
in electricity and gas flexibility and storage
of biomethane injected into the grid
“ENGIE is a key player in the UK’s energy transition, backed by significant financial investment. We are proud to support security of supply and contribute to the UK’s clean energy ambitions through the assets we develop and operate across the country.”
Miya Paolucci, CEO ENGIE UK
Acquisition of UK Power Networks
In May 2026, ENGIE acquired UK Power Networks, a company that distributes electricity to 8.5 million households in London, the South East, and the East of England.
By welcoming UK Power Networks’ 6,500 employees and its 192,000 km network, we are significantly strengthening our position in regulated infrastructure. This acquisition makes the United Kingdom our second-largest country of operations.
ENGIE in the United Kingdom: a robust and diversified low-carbon energy portfolio
ENGIE owns and operates a range of assets in the United Kingdom that reflect our vision of a resilient, low-carbon energy mix: onshore and offshore wind farms, solar farms, biomethane units, gas storage facilities, and pumped-storage hydropower plants.
These assets enable ENGIE to play a pivotal role in real-time grid balancing and to support the growth of renewable energy. Total installed low-carbon capacity in the UK portfolio reaches 4 GW.
An overview of our activities in the United Kingdom
Major expansion in onshore and offshore wind and solar
Through Ocean Winds, our joint venture with EDPR dedicated to offshore wind, we already operate 1.4 GW of offshore wind capacity, with an additional 0.9 GW under construction. In solar and onshore wind, we accelerated in 2025 with the acquisition of a 157 MW portfolio in England and Wales.
Among our flagship projects, the Moray East offshore wind farm (950 MW) stands out as a national benchmark: it includes 100 turbines covering 295 km² and supplies electricity to nearly 1 million UK households. Its neighbouring project, Moray West (882 MW) includes 60 turbines and is capable of powering 1.3 million homes.
Construction of the Moray West wind farm in the Moray Firth, north of Scotland
Flexibility & storage: the backbone of the UK grid
ENGIE is the UK leader in storage and flexibility. The Dinorwig (1.8 GW) and Ffestiniog (360 MW) pumped-storage plants alone account for more than 74% of the country’s total pumped-storage hydro capacity. They can respond instantly to grid fluctuations and help stabilize the electricity system.
These two plants, operated by First Hydro Company (which is 75% owned by ENGIE), are undergoing an extensive refurbishment and modernization program.
This flexibility is complemented by the Stublach gas storage facility. Operated by our wholly owned subsidiary Storengy, it is the largest facility of its kind in the United Kingdom. It offers 400 million m³ of capacity and “fast-cycling” flexibility, enabling rapid gas injection or withdrawal to stabilize the grid.
Our flexibility portfolio is further strengthened by battery energy storage systems (BESS), with two projects to be commissioned this year. Together, our pumped-hydro storage, gas storage and battery assets provide critical storage capacity that underpins flexibility across both power and gas systems, supporting the UK’s transition to a more resilient, low-carbon energy mix.
Dinorwig power station, Wales, United Kingdom
Biomethane : a pillar of the UK transition
In addition to low-carbon electricity, ENGIE is actively developing biomethane in the United Kingdom. We operate several sites in England and inject more than 210 GWh of biomethane into the grid each year. Our facilities support both the energy transition and the circular economy by recovering agricultural and food waste, while providing stable income to partner farmers.
Biomethane produced by ENGIE reduces greenhouse gas emissions by more than 46% compared to conventional natural gas and is a powerful lever for decarbonizing UK industries and organizations.
Biomethane contracts are also certified through RGGOs (Renewable Gas Guarantees of Origin), ensuring transparent traceability in line with UK industry standards.
Biomethane – Gorst, United Kingdom
Energy supply and support for businesses
ENGIE is also a major energy supplier in the B2B market, with 17,000 business customers ranging from SMEs to large public and private organizations. With 20 years of experience in energy supply in the United Kingdom, we offer competitive, certified green supply solutions tailored to our customers’ decarbonisation needs.
ENGIE employees, United Kingdom
News Focus
ENGIE and PepsiCo: a landmark biomethane partnership in the United Kingdom
In 2026, ENGIE signed a 10-year biomethane supply agreement with PepsiCo, the first of its kind in the UK. The partnership will support the development of a new anaerobic digestion unit and increase local biomethane production, reducing more than 10,900 tonnes of CO₂ per year and accelerating the decarbonization of the agri-food industry.
ENGIE supplies 100% renewable electricity to McDonald’s UK
ENGIE supplies McDonald’s UK with 100% renewable electricity through a 15-year Power Purchase Agreement (PPA) backed by the Douglas West Extension wind farm.
This agreement sustainably reduces the carbon footprint of the restaurant network and strengthens the role of renewable energy in the UK electricity mix.
Solar PPAs in the UK with Metlen and Safran UK
ENGIE signed a 10-year solar PPA with industrial company Metlen covering six UK sites, representing 235 MW and 233 GWh per year, avoiding more than 52,000 tonnes of CO₂ annually.
Safran UK also signed its first long-term PPA with ENGIE, here again over 10 years, based on local solar generation to power twelve industrial sites and cut their direct emissions (Scope 1 & 2) by half by 2030.
ENGIE supplies Unite Students with renewable energy
ENGIE and Blackfinch Energy signed an agreement to supply renewable electricity to Unite Students, the UK’s leading student accommodation provider. This partnership strengthens decarbonization in the student housing sector and supports the UK’s climate commitments.
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