Unlocking investment to finance the UK’s clean energy transition

The UK needs more than £500 billion of investment by 2040 to deliver its clean energy ambitions. The challenge is not simply finding the capital. It is enabling that capital to flow efficiently and effectively.

New research from Standard Life, Santander and Baringa estimates that at least £511 billion will need to be invested across renewable generation, networks, storage and emerging low-carbon technologies.

The UK has deep financial markets and substantial pools of long-term investment capital. However, that capital is not always matched effectively to the risks and financing needs of projects at different stages of their development.

Banks play a critical role during construction and early operations, when risks are highest and financing requirements are more complex. Institutional investors are well suited to long-duration assets with predictable cash flows, but their participation can be constrained by credit quality, project scale, bespoke financing structures and established market practices.

A £120 billion opportunity for institutional investment

The research identifies a potential £120 billion opportunity for greater institutional investor participation across six areas:

• Syndication of large offshore wind projects

• Refinancing operational renewable assets

• Greenfield financing for mid-sized renewables

• Aggregation of smaller projects

• Investment in network infrastructure

• Financing emerging technologies once risks have been sufficiently reduced

Increasing institutional participation could help banks recycle £137 billion of capital into new clean energy projects and deliver around £3 billion in potential financing savings.

This is not about replacing bank finance with institutional capital. It is about using different sources of capital where they are best suited, creating clearer routes for institutional investors to participate and allowing banks to redeploy their balance sheets into projects that most need their expertise and risk appetite.

Five practical solutions

The research highlights five practical solutions that could help mobilise investment at scale.

1. Targeted guarantees: Credit enhancement can improve the risk profile of projects and make investment accessible to a broader range of institutions.

2. Blended finance: Combining bank, institutional and public finance can allocate risks to the parties best placed to manage them and support projects that may not yet be commercially viable through conventional financing alone.

3. Aggregation: Bringing smaller projects together into larger portfolios can help create investments of sufficient scale for institutional investors.

4. Greater standardisation: More consistent financing structures and documentation can reduce complexity, improve comparability and support more efficient investment decisions.

5. Closer collaboration: Earlier engagement between banks, investors, developers and public finance institutions can help align project structures with different financing requirements and create clearer pathways for institutional participation.

Turning growing interest into action

We are seeing growing interest across the financing ecosystem in how these findings can be translated into action.

Banks, institutional investors, developers and public bodies are considering where different forms of capital are best deployed, how financing structures need to evolve and which partnerships can unlock investment at scale.

No single participant can solve the challenge alone. Progress will depend on a shared understanding of project risks, investor requirements and the points in a project’s lifecycle where different types of capital can add the greatest value.