La Caisse de dépôt et placement du Québec has committed to invest up to £1.7 billion (CAD 3.2 billion) for a 20 percent stake in Sizewell C, a 3.2 GW nuclear power station under development in Suffolk, England. The investment, announced on July 22, 2025, pushes the £38 billion (USD 51 billion) project to its Final Investment Decision, cementing it as one of the UK’s largest clean-energy infrastructure initiatives.
This latest funding round also includes Centrica with a 15 percent stake, Amber Infrastructure at 7.6 percent, and EDF Energy retaining 12.5 percent, while the UK Government holds 44.9 percent. La Caisse, one of the world’s largest institutional infrastructure investors, described its participation as a strategic alignment with both its decarbonization mandate and the UK’s push for reliable low-carbon baseload power.
Why did the UK government approve Sizewell C with private institutional capital despite the sharp rise in project costs?
Sizewell C received its planning approval in July 2022 after a protracted regulatory review, followed by nuclear site licensing from the Office for Nuclear Regulation in May 2024. Full-scale construction officially commenced in January 2024, marking the UK’s largest nuclear build since Hinkley Point C. Initially, the project had been costed at around £20 billion when first proposed, but a combination of high global inflation, supply chain constraints, and additional safety and environmental compliance requirements has pushed the revised estimate to approximately £38 billion.
Industry analysts attribute the sharp increase to rising commodity prices—particularly for steel and concrete—heightened post-pandemic labor costs, and the inclusion of new grid integration and cooling infrastructure to future-proof the plant against climate-related stressors. The expansion of local infrastructure, including transport links and workforce housing in Suffolk, has further added to the capital expenditure. While critics have raised concerns over cost overruns, institutional investors argue that the Regulated Asset Base financing model mitigates the financial risks by spreading the burden between investors, taxpayers, and energy consumers, making the higher capital commitment more acceptable for long-term, yield-focused funds.
This dramatic cost escalation also reflects a broader global trend in nuclear energy projects, where next-generation plants are being designed to meet stricter safety standards and deliver longer operational lifespans. By incorporating these design changes early, Sizewell C aims to avoid mid-life retrofitting costs and ensure consistent 3.2 GW output for over 60 years, positioning it as a cornerstone of the UK’s clean energy and energy security strategy.
The UK Government has chosen to fund the project under the Regulated Asset Base (RAB) model, which allows investors to begin earning inflation-linked regulated returns during construction. Institutional analysts have described this model as a major de-risking mechanism because it shifts much of the cost overrun burden to the state while ensuring predictable cash flows for investors. Consumers will pay a regulated surcharge—estimated at £1 per month—during the build phase to help smooth financing.
The strategy signals the government’s determination to establish a “new golden age” of nuclear power as part of its 2050 net-zero commitment. Officials argue that this investment will protect the UK from global fossil fuel price volatility while cutting long-term energy bills.
What historical context explains the UK’s renewed nuclear push as part of its net-zero strategy?
The UK’s nuclear fleet, which currently provides around 7 GW of installed capacity, has been in long-term decline due to the retirement of older reactors. However, the government aims to increase nuclear capacity to 24 GW by 2050, with Sizewell C and Hinkley Point C serving as anchor projects.
Security concerns led to the exit of China General Nuclear from Sizewell C in 2022, creating room for Western institutional investors such as La Caisse to enter. Analysts point out that with renewable energy facing intermittency and storage constraints, nuclear power remains crucial for providing consistent baseload energy and achieving decarbonization targets.
How are institutional investors and analysts evaluating the financial structure and risk profile of Sizewell C?
Institutional investors view the RAB framework as a reliable long-duration infrastructure opportunity. Analysts have described Sizewell C as offering “predictable, inflation-linked cash flows” that compare favorably to other large-scale energy projects. Centrica’s stake is supported by a 20-year electricity purchase agreement, giving it expected returns above 12 percent if costs remain close to £40 billion. Even if the final cost rises to £47.7 billion, returns are projected to exceed 10 percent, with taxpayers absorbing additional overruns.
La Caisse executives have emphasized their confidence in the UK market, calling this investment a demonstration of their constructive capital approach—balancing financial performance with societal benefits such as energy security and job creation.
What key data highlights Sizewell C’s expected economic and environmental impact?
Sizewell C will generate 3.2 GW of low-carbon baseload power, meeting approximately 7 percent of the UK’s electricity demand and supplying over six million homes. Its operational life is expected to exceed 60 years, and it is forecast to reduce annual carbon emissions by approximately nine million tonnes by displacing hydrocarbon-based generation.
At peak construction, the project is expected to create 10,000 jobs, with thousands more in the nationwide supply chain and around 1,500 apprenticeships. Government officials have characterized it as a strategic driver for regional and national growth over several decades.
How does this investment affect market sentiment, and what are analysts expecting in the near term?
Investor sentiment following the Final Investment Decision has been broadly positive. Institutional investors view the inclusion of large pension pools in the RAB structure as evidence of growing appetite for yield-oriented, low-risk infrastructure.
Analysts remain cautiously optimistic, highlighting that the project’s credibility now depends on meeting cost-control milestones and construction deadlines. Sizewell C is expected to begin earning regulated revenue in Q4 2025, with grid integration milestones closely watched by both regulators and financial markets.
What future milestones should investors monitor to gauge Sizewell C’s success as a model for clean-energy investment?
Over the next two years, attention will center on the project’s ability to manage capital expenditure and deliver within its updated cost framework. Analysts also expect the UK Government to explore additional RAB-modeled nuclear projects if Sizewell C demonstrates financial and operational stability.
La Caisse has announced plans to invest around £8 billion in the UK over the next five years, increasing its British asset allocation by nearly 50 percent. Success at Sizewell C could solidify the RAB model as a preferred mechanism for mobilizing institutional capital into large-scale clean-energy infrastructure worldwide.
This landmark investment reinforces the UK’s ambition to accelerate its energy transition and reduce reliance on fossil fuels. If delivered within budget, Sizewell C could serve as a template for balancing energy security, decarbonization, and long-term investor returns.
Discover more from Business-News-Today.com
Subscribe to get the latest posts sent to your email.
