Key Points
- Great British Energy – Nuclear and Rolls-Royce SMR have signed a landmark contract to move forward with the UK’s first small modular reactor programme at Wylfa in North Wales.
- The agreement allows work to begin immediately on the delivery of three Rolls-Royce SMRs at the site on Anglesey.
- The project is being positioned as a major boost for British contracts, with Rolls-Royce SMR saying the deal brings certainty to the programme.
- The National Wealth Fund is committing up to £599 million to support development of the reactors.
- GBE-N previously signed a £300 million contract with an Amentum/Cavendish Nuclear joint venture to act as Owner’s Engineer for the Wylfa deployment.
- BBC reported that the project is expected to create 8,000 jobs and has been approved for construction at Wylfa.
- The final investment decision is still expected in 2029, with grid connection targeted for the mid-2030s.
- The wider programme is backed by £2.6 billion allocated in the 2025 Spending Review.
- The Rolls-Royce SMR design has reached the final stage of the UK’s Generic Design Assessment, though regulatory completion is still pending.
What has been agreed?
As reported by World Nuclear News, Rolls-Royce SMR and Great British Energy – Nuclear have signed a contract that enables work to start immediately on the delivery of three Rolls-Royce small modular reactors at Wylfa, on the island of Anglesey, North Wales.
The agreement is being described as a major step in the UK’s nuclear revival and, according to Rolls-Royce, it gives the SMR programme greater certainty. It also advances the government-backed plan to establish the country’s first SMRs at Wylfa, a site long associated with nuclear development ambitions in north-west Wales.
Why is Wylfa important?
Wylfa has emerged as the chosen site for the UK’s first small modular reactor project, following government approval announced in November 2025. The location on Anglesey is central to the government’s broader nuclear strategy, which aims to support energy security, industrial investment and regional employment.
BBC reported that work to begin building the new nuclear power station has been approved and that the project is expected to generate around 8,000 jobs. The same report said the site had been selected after a £2.5 billion agreement with Rolls-Royce established last year.
How much money is involved?
The financial backing for the programme is substantial. World Nuclear News reported that the National Wealth Fund is committing up to £599 million to Rolls-Royce SMR to support reactor development. Another report said the project is backed by £2.6 billion allocated in the 2025 Spending Review.
The scale of public support underlines the government’s commitment to getting the programme into delivery. It also suggests the project is being treated not only as an energy investment but as an industrial policy priority, with domestic supply chains and British contracts forming a key part of the plan.
Which contracts have been awarded?
A significant part of the story is the contracting chain now forming around the project. World Nuclear News reported that on 1 April, GBE-N signed a £300 million contract with an Amentum/Cavendish Nuclear joint venture to act as Owner’s Engineer for the Wylfa deployment.
That agreement has a maximum duration of 14 years and is intended to ensure the programme meets regulatory requirements while helping GBE-N secure a final investment decision. In practical terms, that means the UK is not only backing the reactor design, but also locking in specialist engineering and delivery support from firms active in the domestic market.
What do the companies say?
Rolls-Royce said the contract delivers certainty for the SMR programme and strengthens its position in Europe. The company welcomed what it described as a landmark agreement with the UK Government for delivery of the first SMRs in the country.
GBE-N said its teams had worked intensively with Rolls-Royce SMR to finalise the contract, unlocking the next phase of the programme. That wording suggests the parties see the latest deal as more than a procedural step; it is being presented as the point at which the Wylfa project moves from planning towards execution.
What happens next?
The project is still not at final investment decision stage, which is expected in 2029. Until then, regulatory and planning work will continue, including the formal assessment process for the reactor design.
The report from Machine Herald said grid connection is targeted for the mid-2030s, while BBC said the SMRs are expected to start operating in the 2030s after planning and regulatory hurdles are cleared. That means the immediate focus is on design, approvals and supply-chain readiness rather than physical construction at full pace.
Why does this matter for Britain?
The Wylfa project is being framed as a test case for whether the UK can deliver nuclear projects faster and with stronger British industrial participation. By awarding early contracts and backing the programme with public funding, the government is trying to build a domestic supply chain around a strategic energy asset.machineherald+2
The fact that the Rolls-Royce SMR design is the only one to have reached the final stage of the UK’s Generic Design Assessment also gives the project additional momentum, even though the review is not yet complete. For the wider nuclear sector, Wylfa could become a template for future SMR roll-outs if delivery, costs and regulation stay on track.
What should industry watch?
Industry observers will be watching whether the programme keeps to its timeline and whether more British firms secure work as the project moves forward. They will also be looking for clarity on the eventual cost of the three-reactor scheme, which has not yet been disclosed beyond the overall funding allocation.
The next major milestone is the final investment decision in 2029, which will decide whether the project fully crosses from development into committed build. Until then, Wylfa remains one of the most closely watched energy projects in the UK.