Unlocking private capital for UK infrastructure

The UK has clear infrastructure goals but achieving them quickly needs more than just visibility. Government, investors and industry need to build the confidence and capability to unlock private capital at scale.

The latest update from the National Infrastructure and Strategic Transformation Authority (NISTA) sets out approximately £530bn across 780 projects, now subject to a quarterly refresh and broader integration of mayoral combined authority programmes.  

This offers a clearer, more coordinated plan for the country’s infrastructure priorities. Yet transparency alone will not bridge the gap. Long-term infrastructure requirements are estimated at more than £1.6tn. The challenge isn’t just identifying projects. It’s also structuring and governing them in ways that convert ambition into investable propositions. 

Turning ambition into investment 

The NISTA pipeline brings greater coherence across energy, transport, water, housing and regional growth. It also highlights structural differences between sectors. 

“Stable revenue frameworks and clear regulations, like those in water utilities, show how private financing can work at scale.” 

In contrast, newer areas, particularly energy transition and regeneration, often involve more complex risk allocation and evolving policy frameworks. 

Recent changes have improved the landscape, including: 

• RIIO-3 determinations (2025) have clarified network investment parameters.
• Early-2026 commencements under planning reform aim to improve alignment between infrastructure and local plans.
• NISTA is developing enhanced data and skills initiatives to strengthen delivery capability. 

These changes improve confidence. But for investors, clarity of revenue model and risk allocation remains decisive. 

Creating the conditions for confidence 

Turning national ambition into investable projects requires coordinated action across four areas: 

1. Policy stability and planning certainty 

Clear regulations and efficient planning remain fundamental to building investor confidence. Recent planning reforms are intended to reduce uncertainty and improve coordination between national priorities and local delivery. This includes updates to the local plan system and infrastructure levy mechanisms. Maintaining consistency and clarity in policy signals will be critical to sustaining momentum. 

2. Bankable delivery models 

To attract capital, delivery models must clearly allocate risk and ensure predictable returns. Standardised contracts and clearer commercial frameworks continue to play a central role.  

Approaches such as Regulated Asset Base models, outcome-based partnerships and structured revenue floors can help unlock financing where demand risk is difficult to forecast.  

Embedding these considerations early in procurement leads to more robust commercial outcomes. 

3. Blended and catalytic finance 

The National Wealth Fund has broadened its strategic ambition, with its January 2026 plan targeting mobilisation of up to £100bn supported by £27.8bn of public capital.  

By offering guarantees, loans and equity, the fund can play a catalytic role, de-risking projects and crowding in institutional investors that might otherwise hold back. 

In parallel, the expanded Mansion House Accord is expected to release up to £50bn of pension capital into productive finance, including UK infrastructure. 

Together, these interventions signal a stronger alignment between public ambition and institutional appetite, provided projects continue to demonstrate robust governance, transparent risk allocation and a clear route to returns. 

4. Demonstrable delivery capability 

Investors commit where they have confidence that programmes can be delivered as promised - on time, on budget and within agreed risk parameters. 

Strengthened governance structures, digital performance reporting and transparent programme controls all help build that confidence. NISTA’s evolving data initiatives further demonstrate a clear recognition that delivery capability must keep pace with the scale and ambition of the pipeline. 

At a project level, disciplined cost and commercial management and clear accountability frameworks shape financing outcomes. These factors affect both investor appetite and the cost of capital. 

Partnership across government, investors and industry 

Unlocking private capital at scale depends on clear, coordinated roles across government, investors and industry. 

The government’s task is to sustain a credible, regularly updated pipeline, ensure regulatory durability and strengthen delivery capability through improved skills, governance and data transparency. These elements provide the foundation for investor confidence and long-term commitment. 

Investors and lenders in turn, have a critical role in engaging early to help shape commercially viable structures. Aligning risk allocation with long-term sustainability and return expectations is essential to mobilising capital efficiently and at scale. 

“For industry, visibility needs to translate into consistent, high-quality execution..” 

Delivery excellence, measurable social and environmental performance and robust assurance frameworks are all central to maintaining investor trust and reducing cost of capital 

At the centre of this, NISTA’s role continues to evolve, maintaining the pipeline, supporting cross-sector alignment and improving performance visibility. Its effectiveness will be judged not only by transparency, but by tangible improvements in delivery outcomes. 

Adding value beyond capital 

Infrastructure investment is increasingly expected to deliver outcomes that extend well beyond financial return. Social value, regional growth, climate resilience and alignment with net-zero goals are now central to how capital is allocated and assessed.  

“These factors are becoming material gatekeepers for access to both public and private investment.”  

Projects that integrate these outcomes into their commercial structures, governance frameworks and performance measures, rather than treating them as compliance requirements, will be better positioned to attract long-term investment.  

Adding value from the outset strengthens both investability and long-term impact. 

Turning visibility into delivery excellence 

The UK has taken meaningful steps to strengthen the conditions for infrastructure investment decisions. These include a transparent £530bn pipeline with quarterly updates, expanded catalytic capability through the National Wealth Fund, and growing institutional alignment under the Mansion House Accord.  

There’s also greater regulatory clarity through Ofgem’s RIIO‑3 price control period, alongside the first wave of planning reform taking effect in 2026.

“Together, these developments provide a more solid foundation than at any point in the past decade.”  

But visibility alone isn’t enough. Pipeline transparency must now be matched by investability, disciplined execution and measurable delivery performance. Confidence will depend on consistent policy signals, predictable revenue frameworks and delivery models that provide clarity on risk and return. Capability will grow through strengthened governance, digital assurance tools and a skilled delivery ecosystem. 

Collaboration between government, investors and industry will be essential to convert today’s transparency into tomorrow’s projects. If these elements align effectively, the UK can unlock private capital at scale, turning its infrastructure roadmap into real, measurable delivery.