Some of our speakers

  • Paul Dickinson | Founder, CDP

    Paul Dickinson is the founder of CDP, co-founder of Transition Value Partners and a presenter on the Outrage & Optimism podcast alongside Christina Figueres and Tom Rivett-Carnac. He founded CDP in 2000 with an ambition of creating a global economic system that operates within sustainable environmental boundaries and prevents dangerous climate change.

  • Maia Kutner | Global Director, GHG Protocol (WBCSD)

    Maia Kutner is Global Director of the GHG Protocol at WBCSD, co-leading its secretariat alongside WRI. With over 15 years’ experience, she previously directed corporate and cities reporting at CDP, helping thousands of organisations—including large global companies and municipalities—measure and disclose climate-related data.

  • Michael Gillenwater | Co-Founder & Dean, GHG Management Institute

    Michael is a globally‑recognised authority on greenhouse‑gas measurement. He has shaped climate policy and systems since the mid‑1990s. A lead author on multiple IPCC reports (contributing to the 2007 Nobel Peace Prize), he’s served as a negotiator and methodology expert under the UNFCCC and Kyoto Protocol. He also advises the SBTi and ICVCM.

  • Tamara Somers | GM, Sustainability & Impact, Xero

    Tamara Somers is a globally recognised sustainability strategist, leading sustainability at Xero, the global accounting software firm. She is passionate about helping businesses move from performative pledges to purposeful action. With over 25 years of international experience, she empowers leaders to align decisions with lasting value for people, planet, and profit.

  • Mike Berners-Lee | Professor, Author & Founder, Small World Consulting

    Mike is a leading expert on carbon accounting. He is a professor at Lancaster University and founder of Small World Consulting. His books include How Bad Are Bananas? The Carbon Footprint of Everything,, There Is No Planet B and A Climate of Truth, and he is a contributing author to The Climate Book created by Greta Thunberg.

  • Jessica Sumday | Co-Founder & CEO, Sumday

    Jessica is the co-founder and CEO of Sumday, a leading carbon accounting software company. With a background in accounting and sustainability, she is passionate about making environmental reporting as routine and rigorous as financial reporting.

  • Duncan Oswald | Climate Science Lead, Sage

    Duncan Oswald is Climate Science Lead at Sage, bringing more than 25 years’ experience in environmental consultancy. A chartered environmentalist and net-zero specialist, he helps organisations from governments to multinationals, turn climate science into practical decarbonisation strategies that deliver real-world impact.

  • Hanna Scholta | Research Associate, Technical University of Munich

    Hanna’s research focuses on the development of efficient and implementable decarbonization strategies and instruments. Currently, Hanna's work focuses on green electricity claims, examining pathways to more granular matching to effectively drive investments in renewable energy sources and storage solutions.

  • Linday Ellis | Co-Founder & COO, Sumday

    Lindsay is Co‑Founder & COO of Sumday, a leading carbon accounting platform. A qualified CPA with more than a decade’s experience—from audit to sustainability strategy—he’s on a mission to equip accountants and organisations with the tools and education needed to embed carbon accounting alongside financial reporting.

  • Tim Croker | Head of Carbon Accounting, Climatiq

    Tim Croker is Head of Carbon Accounting at Climatiq and a former Fellow Chartered Accountant (FCA). With over 17 years’ experience in carbon accounting, he has worked across public and private sectors to build robust, science-aligned emissions tools and strategies. At Climatiq, Tim leads the science and data team, helping organisations integrate accurate, audit-ready carbon data into their decision-making and reporting systems.

Agenda

Summary

  • Whilst the conference will officially start at 9:45, please do join us for some light breakfast and networking with your peers in the industry.

  • A warm welcome from CAA co-founders, Emilien Hoet and Andrew Griffiths with a mindfulness exercise and some scene setting for the day.

  • Join Tamara Somers, Jessica Richmond and Lindsay Ellis for an open, candid discussion on where we are at as a carbon accounting industry, some of the challenges we face, opportunities to scale, and the journey many of us are going through. This discussion hopes to set the tone for the day in framing our collective approach to carbon accounting and how we can enhance our impact. 

  • Paul Dickinson will deliver a keynote speech on how we can better use the tools of carbon accounting. A provocation on how we can have more impact in our industry.

  • While many carbon accounting solutions have emerged in recent years, they have all suffered a common weakness – a reliance on a limited range of freely accessible, reliable, and comparable emissions factors (EFs).   

    Join Mike Berners-Lee, Duncan Oswald as they discuss the current challenges with EFs and explore some of the details behind the Carbon Commons project, a solution supported by the Carbon Accounting Alliance. 

  • An interrogation of the impact of Renewable Energy Credits (RECs), Power Purchase Agreements (PPAs) and time-matched RECs, as well as areas where Scope 2 accounting needs reform. 

  • An interactive session to discuss the latest releases of the GHG Protocol and SBTi standards, allowing for both questions and suggestions to be pitched to both GHG Protocol and SBTi representatives. Outputs will be documented and should form part of the wider consultation process. 

  • What is the purpose of Scope 3? How do we improve our collective approach: which is working well and what needs reform? Too often carbon accountants fail to distinguish between inventory (aka "attributional") and intervention (aka "consequential") GHG accounting methods – which are appropriate for fundamentally different purposes. For example, practitioners sometimes use inventory accounting to assess how much a mitigation action reduces emissions whereas intervention accounting may be more appropriate. This panel aims to discuss the wider issues with Scope 3 accounting as well as a practical discussion on inventory vs. intervention accounting. 

  • Delegates will be divided into small groups of up to 10 people to discuss key questions or challenges faced in the carbon accounting industry today. Questions will be determined by popular vote with delegates ahead of the event, but will likely include some of the following:  

    • "How can we simplify our advice on the role of removals, beyond value-chain mitigation and decarbonisation to achieve Net Zero?" 

    • "How can we better incentivise and rate companies' meaningful climate action?"  

    • "How do we harmonise the use of emission factors for better consistency and comparability of footprints?" 

    • "How do we meaningfully reduce emissions hard-to-decarbonise industries including aviation, chemicals, steel, cement, agriculture?" 

    • "How do we simplify the FLAG calculation process?" 

    • "How can we align PCF methodologies in specific industries?" 

  • Calculating emissions is the easy part. Making complex science accessible and inspiring change is much harder. This session gives practical examples of how we can bring carbon accounting data & insights to life so to maximise its impact. 

  • Andrew & Emilien will conclude the day with a summary of the key messages and share some hopes for the future of the industry. 

  • We invite you to discuss your learnings with your peers over drinks.