One of the biggest clean energy projects in Britain, Sizewell C will generate 7% of the UK’s electricity needs, providing low-carbon electricity to six million homes for at least 60 years and saving nine million tonnes of carbon dioxide from entering the atmosphere annually.

In the first phase of this collaboration, VodafoneThree will build two masts on site to provide 5G mobile coverage for the Suffolk site and the surrounding community. VodafoneThree’s partner, Fern Communications, now part of OEG, will provide seamless radio coverage eliminating potential communication black spots throughout the Sizewell C construction site.

The 5G coverage and radio will bring a whole host of benefits to Sizewell C’s operations, including enhanced communication among workers, enabling seamless co-ordination across teams working on a large-scale construction site. Additionally, better mobile infrastructure will support the swift exchange of data and updates, improving the overall efficiency and productivity of the construction process.

VodafoneThree will also deploy fibre to the site, so that the entirety of the construction project will able to use WiFi to connect to Local Area Networks (LANs) and Wide Area Networks (WANs). This will complement the 5G coverage, enhancing operational efficiency. The connectivity project, which began in November 2024, promises to help support construction site safety, security and efficiency, and strengthen mobile connectivity across the site.

Improved mobile coverage will provide more reliable connectivity for both residents and businesses in the surrounding area, facilitating access to digital services and supporting the growth of the local economy.

Damian Leydon, Sizewell C Site Delivery Director, said: “Connectivity is vital for this project. High-quality, reliable connection helps us to operate at the highest standards of safety and efficiency. So, it’s an important step to be working with VodafoneThree and Fern Communications to provide what we need on site. And it has the added benefit of providing 5G for the local area too: another great example of how benefits to the project can go hand-in-hand with benefits for the local community.”

A British project majority-owned by the government, Sizewell C will play an important role in achieving clean power by 2030 and in supporting the UK’s long-term energy independence. The project will support thousands of jobs across the UK, creating 1,500 apprenticeships, and will deliver 70% of its construction value to British suppliers.

Nick Gliddon, Business Director, VodafoneThree, said: “We are delighted to be the connectivity partner for Sizewell C. Alongside our contractors, we will deliver robust, secure, and resilient communications infrastructure that is essential to the success of one of the UK’s most significant energy projects and to support the UK’s transition to cleaner energy. This partnership underscores our commitment to enhancing connectivity across the country, ensuring that communities and businesses in Suffolk and beyond can benefit from the advancements in technology and infrastructure that Sizewell C will bring.”

Sizewell C has already delivered £4bn in contracts to over 300 UK suppliers and has so far spent £330m with 77 regional suppliers, including 41 in Suffolk alone. This latest agreement will also benefit local business in Suffolk, with VodafoneThree partnering with local company, Fern Communications, to provide radio connectivity.

Clive Cushion, Technical Director at Fern Communications, said: “As a Suffolk-based company with a diverse workforce and deep roots in the energy industry, we are thrilled to partner with VodafoneThree on a project of such national importance. Our mission is to deliver an unparalleled communications system that will support Sizewell C’s operational efficiency, safety, and long-term success.”

This partnership reflects VodafoneThree’s growing reputation as a trusted partner for the UK’s energy industry. A recent win with SP Energy Networks is aiding efforts to modernise the UK’s energy infrastructure and meet the country’s net zero targets. VodafoneThree is also the connectivity partner at Sizewell’s sister project, Hinkley Point C in Somerset, where more than 10,000 people are now working on its construction. Across England, Scotland and Wales, VodafoneThree works with 100% of the electricity and gas transmission operators, as well as 100% of the electricity and gas distribution operators supporting energy organisations that serve over 22 million households and businesses across the UK.

About VodafoneThree

VodafoneThree is the UK’s largest mobile network operator serving the fixed and mobile market, formed following the merger of Vodafone UK and Three UK in June 2025.

Through an unprecedented £11 billion investment, VodafoneThree will build the UK’s best network. The network will deliver reliable, quality connectivity to all nations and regions, creating as many as 13,000 jobs and laying a digital foundation for the country’s growth ambitions. VodafoneThree is the only mobile network operator with a fully funded, regulated and guaranteed network build plan, reaching 99.95% population coverage by 2034. From big cities to small towns, and everywhere in between, the company’s mission is to build the UK’s best network.

VodafoneThree is a private company, 51% owned by Vodafone and 49% owned by CK Hutchison Holdings. It encompasses all businesses and assets, including Vodafone UK, Three UK, VOXI Mobile, SMARTY and Talkmobile.

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About Sizewell C

Sizewell C is a new 3.2GW nuclear power station being built on the Suffolk coast. One of the biggest clean energy projects in Britain, Sizewell C will provide low-carbon electricity to six million homes for at least 60 years and save nine million tonnes of carbon dioxide from entering the atmosphere annually. The project will support thousands of jobs across the UK, creating 1,500 apprenticeships, and will deliver over 70% of its construction value to British suppliers. Find out more at sizewellc.com

For more information: Nick Osbourne: Nicholas.Osbourne@sizewellc.com / 07384 528 466

About Fern Communications Fern Communications is an OEG Renewables company. OEG is a trusted partner in mission-critical services and solutions supporting the energy transition. A focus on creating value and continuously improving expertise are key to our growing business success. We help the global energy industry advance with a versatile approach and a commitment to delivery. With the largest global fleet of reusable offshore cargo carrying units and operations in over 60 worldwide locations, we offer the best of size and scale, tailored to meet customers’ local needs. Our cargo carrying units ensure the safe and reliable delivery of equipment, food, and fundamental supplies to and from offshore energy operations, 365 days per year. Our Renewables business provides critical high-value services for the development, construction and maintenance of offshore wind farms and other marine energy businesses. OEG’s heritage dates back more than 50 years and the Group employs approximately 1,200 skilled personnel.