Berry Bros. & Rudd and The Wine Society partner with International Wineries for Climate Action (IWCA) to launch the Carbon Calculation Challenge 2026 at the London Wine Fair.
May 19, 2026 (London, UK) — Berry Bros. & Rudd and The Wine Society have joined forces with International Wineries for Climate Action (IWCA) to launch the Carbon Calculation Challenge 2026: an initiative designed to help wineries take a practical first step in measuring their greenhouse gas emissions.
Launching at the London Wine Fair, the initiative, with retailer-backed support, makes IWCA’s greenhouse gas (GHG) emissions calculator freely available to wine businesses of all sizes, anywhere in the world. The tool enables users to measure Scope 1 and Scope 2 emissions, helping businesses understand where emissions arise within their own operations and build confidence in carbon measurement.
The calculator has been deliberately designed as an accessible entry point, for those new to carbon accounting. By focusing on Scope 1 and 2 emissions — areas where data is most readily available and actions are most directly within a business’s control — the Challenge aims to lower the barriers that often prevent wine businesses from getting started with carbon measurement and reduction.
For businesses ready to go further, IWCA already offers free, robust calculators covering Scope 3 emissions, allowing participants to progress towards more complete value‑chain carbon measurement at their own pace.
Speaking about the launch, Charlotte Hey, Executive Director of IWCA, said: “Many wine businesses recognise the importance of measuring their carbon footprint but find the process daunting. This Challenge is about making that first step simpler and more achievable, to help the sector move forward.
Supporting producers to get started
Together, Berry Bros. & Rudd and The Wine Society work with hundreds of producers across diverse regions and scales. By backing the Carbon Calculation Challenge, the retailers aim to support producers who want to begin measuring emissions but lack the tools or confidence to do so independently.
IWCA will provide guidance and support to participating wineries throughout the Challenge, helping them interpret results, understand emission “hotspots”, and begin
exploring practical opportunities for reduction as part of longer‑term climate planning. Participation in the Challenge is voluntary, and businesses retain ownership of their data.
A practical, credibility‑led approach
The Carbon Calculation Challenge is designed to complement, rather than replace, more advanced carbon accounting efforts. It focuses on building familiarity with carbon measurement and creating a shared baseline from which businesses can progress at their own pace.
“Progress starts with measurement. By working with IWCA and The Wine Society, we’re aiming to make that first step more accessible for producers and to build momentum across the industry.” — Adam Holden, Head of Positive Impact, Berry, Bros. & Rudd
“We often hear from wine businesses that they want to reduce their carbon footprint, but don’t know where to start. This free-to-use carbon calculator tool from IWCA, launched together with The Wine Society and Berry Brothers & Rudd, is an easy way for those businesses to get going – to measure their footprint, identify emission hotspots and put plans in place to reduce.” — Dom de Ville, Director of Sustainability and Social Impact, The Wine Society
Sign-Up Now
Wineries and retailers wishing to take part in the Carbon Calculation Challenge 2026 can contact Charlotte Hey, International Wineries for Climate Action: charlotte.hey@iwcawine.org
About BBR
Berry Bros. & Rudd is Britain’s oldest fine wine and spirits merchant, founded in 1698 and still family-owned today. From its historic home at 3 St James’s Street, London, the company has built an international reputation for sourcing, producing and selling some of the world’s finest wines and spirits.
For over three centuries, Berry Bros. & Rudd has been guided by a simple philosophy: “Is it good to drink?” The company is known for its deep relationships with leading producers, its expertise in fine wine and spirits collecting, and a commitment to personal service and long-term partnerships.
Berry Bros. & Rudd holds a Royal Warrant and supplies wines and spirits to the British Royal Household. In addition to its historic London shop, the company operates internationally and offers private client services, fine wine auctions, education, and curated experiences for collectors and enthusiasts worldwide.
About The Wine Society
Founded in 1874, The Wine Society is the world’s oldest member-owned wine club and the UK’s only cooperative wine retailer. Owned by its members, for its members, The Wine Society exists solely to champion great wines and exceptional service, always putting people and quality before profit.
