From impact measurement to impact valuation

informing sustainable business decisions

The ESG Exchange hosts a series of tech-talks with our community of guest experts. The aim of these free webinars is to channel knowledge for businesses to better implement best practices regarding ESG, nature and people impacts and public reporting, disclosure and risks and opportunities assessment.

Previous tech-talks have focused on materiality assessment or double materiality, with partners such as the Global Reporting Initiative, IFRS Foundation and the International Sustainability Standards Board, Value Balancing Alliance, United Nations Development Programme, EFRAG, the World Benchmarking Alliance among others.

What you will learn

This webinar is intended to equip business attendees with the ability to understand the difference between:

  1. The measurement of companies’ activities, also called “impact drivers” (for example carbon emissions or employee training) and
  2. The final value resulting from this impact (for example, the social cost of carbon on human health or the positive change in wellbeing level).


Recently, businesses leaders have led Integrated Profit and Loss Accounts, also called Natural Capital Accounting or Multi-capital Accounting to inform and transform their decision-making. They are paving the way for a new normal, where impact valuation will be a normal practice for purposeful businesses.

Session objectives:

Participate to learn:

  • Why valuing invisible costs and benefits related to impacts on nature is crucial for business to thrive.
  • How businesses are leading accounting practices to integrate impact valuation into financial statements, transforming the notion of good performance.
  • How impact valuation informs more sustainable decisions that support the enhancement of nature’s state and people’s wellbeing.

Useful links:

Hosted by:

Guest Speakers:

Peadar Duffy

Global ESG Practice Lead at Archer Integrated Risk Management

Chair of the Technical Committee

Peadar Duffy is Archer’s Global ESG Practice Lead, and is responsible for leveraging his thought leadership in the organizational risk and governance domains to provide strategic direction and collaboration across Archer’s internal and external partners in the design and development of Archer’s ESG solutions. 

He currently represents Ireland on the ISO technical committees for Risk Management (TC 262) and the Governance of Organisations (TC 309) where he is involved in the development and revision of various guidelines, reports and technical specifications.

Most recently Mr. Duffy had been involved with other international experts in the development of the first global governance guideline which emphasizes organizational purpose and other ESG-sustainability principles underpinning performance and long-term viability. Mr. Duffy began his 25-year career in risk management spanning multiple industry sectors in Ireland, the US and Middle East following 15 years in the Irish military.

Helen Slinger

Executive Director at Accounting for Sustainability (A4S)

Helen leads the work at A4S to provide finance professionals with the knowledge, skills and practical guidance to embed sustainability into their business-as-usual. Whilst at A4S, Helen has led the development and delivery of the A4S Academy and driven the substantial expansion of A4S’s knowledge hub.


During her time as Head of Sustainable Business at Yorkshire Water, Helen championed a transition to a sustainable business model. She was instrumental in formalising governance structures for their transition to net zero and advancing their TCFD, sustainable finance framework and multi-capitals impact reporting.


Previously at PwC, Helen supported a diverse portfolio of clients in addressing their sustainability challenges across governance, strategy, reporting and assurance.


Helen is a Fellow of the Institute of Chartered Accountants in England and Wales (ICAEW), a Practitioner Member of the Institute of Environmental Management and Assessment and an Accredited Social Return on Investment Practitioner. She is a commissioner on the Yorkshire and Humber Climate Commission, sits on the ICAEW Sustainability Committee, is a member of the Capitals Coalition Advisory Panel and advisor to the University of Cambridge Institute of Sustainability Leadership. She also has an Executive MBA.

James Spurgeon

Natural capital & impact valuation expert

James has 30 years’ experience in impact valuation – quantifying and valuing natural, social and human capital impacts and dependencies for businesses, financial institutions and governments. He has undertaken hundreds of environmental and social valuation studies and developed numerous related sustainability decision-support tools for clients in many different sectors in the UK and worldwide.


James was a lead author of the Natural Capital Protocol and the Integrated Capitals Assessment Principles, and an author of the Natural Capital Protocol Finance Supplement. He has written many other business guides covering natural and social capital accounting, and ecosystem and water valuation.


James sits on the Advisory Panel of the Capitals Coalition and is the Technical Advisor to the Value Accounting Network. He was previously a technical advisor to the Prince of Wales’ Impact Value Working Group, and leader of the EU Business and Biodiversity ‘Natural Capital Accounting’ work-stream .


James has an MBA focusing on sustainability and environmental markets, an MSc in coastal resource management focusing on environmental valuation, and a BSc in Zoology. James loves wildlife, books, films, travelling, outdoor activities and attempting to keep his hand in at a wide range of both ball and water-based sports.

Marta Santamaria

Senior Advisor at Capitals Coalition

Marta has 15 years of experience promoting environmental economics and natural capital valuation, both in the public and the private sectors. Prior to her appointment at the Coalition, Marta worked as Scientific Project Officer for the European Commission’s Institute for Energy and Transport.


In the past, she has worked for PwC, the Spanish National Research Centre of Energy, Environment and Technology, Red Electrica de España and the Universidad de Alcalá. In 2012, Marta was awarded a PhD in Global Change and Sustainable Development from Universidad de Alcalá, Madrid, Spain.

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