The Impact Equation

Luke Leslie is the co-founder and CEO of Key Carbon, investing directly into businesses generating high integrity carbon credits, from clean cooking stoves in sub-Saharan Africa to regenerative agriculture in Europe and mangrove restoration in Myanmar. Luke explains how Key Carbon has borrowed from royalty and streaming models used in mining, then adapted them for carbon markets. The result is a more hands-on and structured approach that is attracting hundreds of millions of dollars of institutional finance into nature investment.

In this episode, Rafi sits down with Claudine Blamey, Chief Sustainability Officer at Aviva. Claudine’s story starts far from the boardrooms of British business. She arrived in London from Tehran as a child, speaking no English. That experience shaped a mindset that has stayed with her throughout her career: nothing is forever, and even the most complex situations can be navigated. Three decades later, Claudine has helped shape sustainability strategy across sectors – from sustainable buildings at British Land to aviation’s first net-zero strategy at easyJet, and now climate and nature strategy at Aviva. In this conversation, she reflects on how her early experiences of migration shaped her resilience and leadership; why insurers have a unique role in managing and pricing climate risk; the growing reality that parts of the UK could become uninsurable due to climate impacts; Why nature restoration could become a major global asset class; And, how sustainability leaders are shifting from ambition-setting to systemic change.

This episode we're joined by Summer Kennedy for a special episode looking back at our first series with Fast Forward. In this series, we’ve featured three amazing entrepreneurs backed by Fast Forward, a trailblazing accelerator backing tech nonprofits solving urgent, global problems at scale. Summer quite literally drives Fast Forward forward; shaping the strategic vision and building the systems that get the organisation there. Her path to leadership has been anything but linear: from teaching first grade in Oakland to spearheading tech-for-good initiatives, Summer’s career proves that the most impactful journeys don’t follow a straight line. We reflect on three conversations with Fast Forward investments - Sunny Patel of Vector Cam, Alysia Garmulewicz of Materiom and Michelle Brown of CommonLit.

This episode we're not joined by Ed Davey, the leader of the Liberal Democrats, but a pioneer on forests, agriculture and food security who has worked all over the world, from Tibet to Yemen and Colombia. With roots in social justice and anti-poverty campaigning, Ed cut his teeth in efforts around debt, poverty, and development with organisations like Oxfam and the wider Make Poverty History movement before joining the then Prince of Wales – now King – to drive high-level work on forests, sustainable agriculture, and climate through his International Sustainability Unit. Since then, Ed has become a driving force in the world of sustainable food, nature and climate, helping drive the work of the World Resources Institute and advising the Food and Land Use Coalition and its push to transform how the world grows and eats. 

Lord Simon Case served four British Prime Ministers as head of the UK's civil service from Boris Johnson in 2020, to Liz Truss, Rishi Sunak and Sir Keir Starmer. Lord Case held the most senior civil service role just as the government hit a run of shocks: Brexit implementation, Covid, war in Europe, economic turbulence, and rapid technological change. In this episode, he’s candid about what it feels like at the centre of crisis decision-making, and why government too often drifts into a self-obsessed “bubble” that’s disconnected from daily life. He also shares what gave him hope: meeting frontline civil servants, and seeing what changes when power and money are tied to real places. We talk about Barrow Rising; a place-based partnership bringing central government, local government, industry and community together around the long-term transformation of Barrow-in-Furness. What does it take to turn billions of public spend next door into better health, education, and opportunity? And can Barrow become a blueprint others can borrow from?

Alyssa Gilbert sits in a rare seat in UK climate innovation: translating world-class science into ventures that can survive the messy reality of markets, regulation, pilots, and procurement. In this episode, Alyssa shares what Undaunted at Imperial College London looks for at the earliest stages, why credibility and communication matter as much as the tech, and what actually helps founders move from “tested in a lab” to “traction in the market”. We also get into the built environment: waste-to-materials, energy management, and the very real barrier of being “the first” in a traditional sector.

This episode is the first in our series with Save the Children Global Ventures, the impact investment arm of Save the Children, backing bold entrepreneurs tackling some of the world’s toughest challenges. In the first episode of the series, we’re joined by Fred Carpinteiro, Founder and CEO of Amparo Prosthetics, a company reimagining prosthetic care for people with limb loss across the world. Amparo is delivering lifetime prosthetic care across 6 continents, using smart technologies to dramatically improve comfort, fit, and user experience for lower-limb prosthetic users. With over 6,000 patients fitted in more than 45 countries, and products now used in 250+ clinics worldwide, Amparo is quietly building one of the most globally distributed prosthetic care platforms. 

In our latest episode of The Impact Equation, we’re joined by Dominic Hofstetter and Ivana Gazibara from the Transcap Initiative, an NGO focused on developing and scaling systemic investing. Most of us start with a pool of capital and ask: what can this money do? Dominic and Ivana flip it: start with the challenge, diagnose the system, then “reprogramme” how money flows to multiple initiatives at once, so capital can actually shift outcomes, not just fund isolated projects. We talk about why “single-asset” investing struggles to deliver systems change, why place-based investing is close (but not always transformative), and their big idea: the “financial backbone”; an actor designed to orchestrate coalitions across philanthropy, public finance, investment capital, insurance and corporate commitments.