Rolls-Royce & Great British Energy: A New Approach

The contract between Great British Energy and Rolls-Royce SMR represents one of the most significant construction commitments in the UK's energy infrastructure programme.

With US$3.3bn in public funding allocated and a further US$760m from the National Wealth Fund, the project will deliver three small modular reactor units, creating 3,000 construction jobs and establishing new industrial delivery frameworks that could reshape how major energy projects are built in Britain.

Following Rolls-Royce SMR's selection as preferred technology partner in June 2025, the formal agreement announced on 13 April unlocks site-specific design work, regulatory engagement and planning processes ahead of a future Final Investment Decision.

The contract marks a shift from traditional nuclear construction methods, with the programme structured around factory-built components and standardised assembly processes designed to reduce the delays and cost overruns that have historically plagued large-scale nuclear builds.

Factory-built construction model

The programme's construction approach differs fundamentally from conventional nuclear projects. Rather than relying entirely on on-site fabrication, the reactor components will be manufactured in factory settings before being transported for final assembly at the deployment locations.

This modular construction method could mean shorter build times and more predictable delivery schedules, addressing two of the most persistent challenges in nuclear project delivery. The standardised approach also allows for quality control measures to be implemented during the manufacturing phase, potentially reducing the technical complications that emerge during traditional on-site construction.

"We are transforming the way nuclear projects are delivered, to give greater cost and schedule certainty with a standardised, factory-built approach," Chris Cholerton, CEO of Rolls-Royce SMR, said in a press release.

The three reactor units are expected to generate at least 1.4 GW of electricity, enough to power around three million homes for more than 60 years once construction is complete.

Supply chain and workforce deployment

Great British Energy's nuclear branch has already awarded more than US$445m in supply chain contracts this year, suggesting the programme's industrial delivery phase is progressing faster than initial timelines indicated.

These contracts establish the manufacturing and logistics networks required to produce and transport the modular components.

The 3,000 construction jobs expected during the build phase represent direct on-site employment, with additional positions spread across the domestic supply chain in manufacturing facilities, component fabrication plants and logistics operations.

Simon Roddy, CEO of Great British Energy's nuclear branch, said in a press release: "Working with Rolls-Royce SMR, we're bringing a significant long-term investment to the UK industrial supply chain. Supporting skills, innovation and growing our industrial capability is essential to this partnership."

The funding structure splits between Great British Energy's US$3.3bn allocation from last year's Spending Review and the National Wealth Fund's US$760m commitment directly to Rolls-Royce SMR. This dual financing approach could provide capital for both the construction delivery and the underlying technology development.

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Construction pipeline expansion

Beyond the UK contract, Rolls-Royce SMR has plans for up to six further units in Czechia. Chris Cholerton says the company is "the only company with multiple commitments in Europe", a position that could influence the viability of its factory-built construction model.

A larger order book allows the manufacturing facilities to operate at higher capacity, potentially reducing per-unit production costs and making the modular approach more economically competitive with traditional construction methods.

The European pipeline also means the UK project serves as the anchor build, establishing the construction processes and supply chain frameworks that subsequent projects could replicate.

Energy Secretary, Ed Miliband, said in a statement: "At a time of global instability, this is a major milestone for Britain's energy security," noting that the project would create "a generation of good jobs" and deliver "clean, homegrown power for decades to come".

Whether the construction model delivers on its promise of cost and schedule certainty will depend on how the factory production scales and how effectively the modular components integrate during final on-site assembly. The UK programme will provide the first full-scale test of these industrial delivery methods in a live deployment environment.