Key Learnings from Episode: Scaling CleanTech in the UK with Sarah Mackintosh, Director of Cleantech for UK

In this episode of Beyond the Raise, Sarah Mackintosh shares a unique perspective from the heart of the UK CleanTech ecosystem. As Director of Cleantech for UK, she works closely with founders, investors and policymakers to help create the conditions needed for climate technology businesses to start, scale and succeed. The conversation explores commercialisation, funding, talent, policy and the challenges facing CleanTech founders as they move from innovation to deployment.

Innovation Isn't the Hard Part

The UK has built a strong reputation for early-stage innovation, particularly in climate technology. However, Sarah highlights that the biggest challenge often comes after the initial breakthrough.

While many founders successfully develop promising technologies, moving from pilot projects to commercial deployment remains one of the most difficult stages of the journey.

Key Takeaways

• The UK has a strong early-stage innovation ecosystem.

• Commercialisation remains a major challenge.

• Many companies struggle to bridge the gap between pilot and deployment.

• Scaling requires a different skill set from innovation.

The Valley of Death Still Exists

A recurring theme throughout the discussion is the funding gap that exists between early-stage development and large-scale deployment.

For hardware businesses and capital-intensive projects, securing the funding needed to move from demonstration to commercial operation remains particularly challenging.

Key Takeaways

• Deployment capital remains difficult to access.

• Hardware businesses face unique funding challenges.

• First-of-a-kind projects often struggle to secure investment.

• Funding gaps continue to slow CleanTech growth.

Commercialisation Requires a Different Mindset

One of Sarah's most interesting observations is how dramatically a founder's role changes as a business grows.

The skills required to attract venture capital and build an innovative product are not necessarily the same skills needed to secure project finance, manage large customers or navigate regulatory environments.

Key Takeaways

• Scaling requires new capabilities.

• Commercialisation is fundamentally different from fundraising.

• Founders often need to evolve their leadership style.

• Growth introduces new operational complexities.

Customer Focus Drives Growth

One of the biggest changes in the market over the past few years has been the increasing importance of commercial value.

While investors and customers may care about climate outcomes, businesses must still deliver clear economic benefits.

The days of relying solely on environmental impact as a selling point are largely behind us. Today's investors expect products and services that are faster, better, cheaper or more effective than existing alternatives.

Key Takeaways

• Customers buy value, not just sustainability.

• Climate benefits alone are rarely enough.

• Businesses need a clear commercial proposition.

• Understanding customer needs is critical.

Growth Creates Operational Challenges

As businesses move towards commercial deployment, founders often encounter challenges they have never faced before.

Managing corporate procurement processes, navigating regulation, hiring specialist talent and working with large organisations all require different capabilities from those needed during the startup phase.

Key Takeaways

• Operational complexity increases rapidly during scale-up.

• Corporate customers introduce new demands.

• Regulatory processes can slow progress.

• Scaling teams creates additional challenges.

The Best Founders Stay Open to Feedback

Throughout the conversation, Sarah repeatedly highlights the importance of founder mindset.

The most successful founders tend to combine strong conviction with a willingness to listen, adapt and bring in expertise where needed.

Those who remain focused solely on their original vision without adapting to customer or market feedback often struggle to scale.

Key Takeaways

• Confidence and adaptability must coexist.

• Feedback can improve decision-making.

• Strong founders understand their limitations.

• Great teams are built around complementary strengths.

Hiring Is Often Left Too Late

Another common challenge is talent.

Sarah sees many founders underestimate both the importance and difficulty of hiring the right people at the right time. Commercial, financial and operational expertise often becomes critical as businesses move beyond their first raise.

Key Takeaways

• Hiring timing matters.

• Specialist expertise accelerates growth.

• Leadership teams should evolve as companies scale.

• Talent gaps can delay progress significantly.

Policy Can Accelerate or Kill Growth

For many climate technology businesses, policy plays a significant role in determining commercial success.

Government support, incentives and regulatory frameworks can help projects reach deployment, while sudden policy changes can undermine years of planning and investment.

Key Takeaways

• Policy stability matters.

• Government support can unlock investment.

• Regulatory uncertainty creates risk.

• Founders should understand the policy environment they operate in.

Public Finance Has an Important Role to Play

The conversation highlights the growing role of organisations such as Innovate UK, the British Business Bank and the National Wealth Fund in supporting commercialisation.

While Sarah believes progress is being made, she also argues that further innovation in public finance and risk-sharing mechanisms could help more companies reach scale.

Key Takeaways

• Public finance can bridge funding gaps.

• Commercialisation requires long-term capital.

• Risk-sharing mechanisms could unlock investment.

• Government-backed support remains important for many projects.

Fundraising Is Only One Part of the Journey

One of Sarah's most practical pieces of advice is directed at founders who have recently completed a funding round.

Rather than viewing a raise as a finish line, she encourages founders to think immediately about what comes next, including team development, operational capability and future funding requirements.

Key Takeaways

• A funding round is a milestone, not a destination.

• Growth requires forward planning.

• Teams should be built for the next stage of development.

• Financial strategy should remain a constant priority.

Looking Ahead

Despite the challenges, Sarah remains optimistic about the future of UK CleanTech. Strong founders, improving policy support and increasing recognition of the sector's importance all provide reasons for confidence. While funding, deployment and commercialisation challenges remain, she believes the UK continues to have the talent and innovation needed to build world-leading climate technology businesses.

Final Thought

Sarah's perspective is a reminder that building a successful CleanTech company requires much more than great technology. The businesses that succeed are often those that combine innovation with commercial discipline, strong leadership, customer focus and the ability to navigate an increasingly complex ecosystem. The challenge is not simply inventing something new—it's creating the conditions that allow innovation to scale.