- Great British Energy – Nuclear has opened a procurement process worth up to £1.08bn for a long-term delivery partner to support the UK’s small modular reactor programme.
- The contract is not for reactor technology or construction. Rolls-Royce SMR already holds the technology-partner role for the first project at Wylfa in Anglesey.
- The tender is designed to give GBE-N programme-wide technical, commercial and project management capacity as it moves from policy ambition towards site-specific design, regulation and eventual construction.
Great British Energy – Nuclear has launched a search for a delivery partner worth up to £1.08bn, marking the latest attempt by the government to build the programme management capability needed to turn Britain’s small modular reactor (SMR) ambitions into an investable project.
The winning bidder will provide technical, commercial and project-management support to GBE-N across the development and delivery of its SMR programme. The role will include overall management, coordination and integration, alongside support for planning, risk management, procurement, environmental assessment and construction oversight.
The tender is valued at £900mn excluding VAT (£1.08bn including VAT), over an initial 14-year period from September 2027 to September 2041. GBE-N has retained an option to extend the agreement until September 2046 and to instruct the partner to support additional deployments beyond the initial programme.
However, the headline figure should be treated with care. The £1.08bn is an estimate of potential expenditure rather than a committed budget or a contract to build reactors. GBE-N has said the eventual value will depend on how the programme develops, the pace at which it passes design and approval gates and whether further SMR projects are added to the scope.
Rolls-Royce SMR has already been selected as GBE-N’s technology partner for the UK’s first SMR project at Wylfa on Anglesey. The two organisations signed a contract in April to begin site-specific design work, regulatory engagement and planning activities for three reactors expected to deliver at least 1.4 GW of low-carbon generation.
The new delivery partner tender therefore appears intended to complement, rather than replace, the Rolls-Royce relationship. Rolls-Royce is responsible for the reactor technology and has separately appointed engineering group Amentum as its own programme delivery partner. GBE-N’s procurement is focused on the public client’s wider role in integrating the programme, assuring delivery and managing the interface between the developer, regulators, supply chain and government.
Great expectations
The structure reflects a lesson from Britain’s recent nuclear history. Large projects can struggle not only because of engineering difficulty but because responsibilities between government, developers, contractors and regulators are poorly aligned. By appointing a long-term delivery partner before construction begins, GBE-N is trying to build a more integrated model from the outset.
The proposed use of an incentivised collaboration agreement is central to that approach. Rather than relying solely on a conventional consultancy framework, GBE-N plans to link incentives to defined outcomes and milestones. In principle, that should encourage earlier risk identification and greater focus on programme-wide performance.
The model is untested at this scale in the UK’s SMR market, however. The central promise of modular nuclear is that factory-built components and repeatable designs can reduce cost and shorten schedules compared with conventional gigawatt-scale stations. But those savings will only emerge if the first project creates a sufficiently standardised template for subsequent units.
Wylfa is therefore carrying a heavy burden. The site was selected for the first deployment because of its nuclear history, available land and existing infrastructure. The government has said the project could support around 3,000 jobs at peak construction, with thousands more across the supply chain.
Yet the programme still faces significant hurdles. Rolls-Royce SMR’s 470 MW reactor design remains in the third stage of the Generic Design Assessment process, while Wylfa must progress through planning and environmental approvals before a final investment decision can be taken.
The new tender does not remove those risks. What it does provide is an indication that GBE-N is preparing for a programme rather than a single demonstration project. The contract allows for additional units and future sites to be brought into scope, which would be essential if the UK is to achieve the cost reductions promised by a fleet approach.
Tender submissions are due by 6 August, with GBE-N indicating an expected award date of 16 September. The winner will inherit a role at the centre of one of the government’s most politically important energy projects.
For the nuclear sector, the prize is substantial. For ministers, the bigger test is whether this procurement can help avoid a familiar outcome: a flagship nuclear project that secures early political momentum but struggles to convert ambition into cost certainty, construction progress and reliable power on the system.
