London Climate Action Week: Our top picks

📖 See illuminem's full guide to the Top Sustainability Events of 2026

London Climate Action Week is here, running from 20-28 June in the capital. Now in its eighth year, it is the largest city-wide climate festival in Europe, drawing over 45,000 people annually across hundreds of events spread throughout the city — the innovators, corporates, policymakers, investors, and campaigners shaping the climate agenda, all in one place at once. With so much on, knowing where to be is half the challenge.

This year in London also marks the inaugural launch of our very own new Sustainability Data Hub™, illuminem’s “Bloomberg of Sustainability”, with the promise to bring unparalleled insights and intelligence to the sustainable transition. Whether you're  a corporate quantifying climate risk or benchmarking competitors, a consumer cutting through the greenwashing, an asset manager enhancing your portfolio, or a solution provider targeting the companies that need you most, join us for our launch webinar on Wednesday at 13:00 BST (08:00 EST).

And now, as the leading platform on sustainability information, we're proud to present to you our top event picks to watch out for. This guide features our selection of recommended events and gatherings, from the best insiders and event organisers!

⭐ For exclusive event invitations / networking, visibility and insights, join our Club. Even better: 50% off, this week only, using code LCAW. Join the world’s #1 community of sustainability leaders!

Sunday, 21 June

12:00–17:00 (Shakespeare's Globe, 21 New Globe Walk, Bankside SE1 9DT) | Shakespeare's Globe: Open house
Main focus: Environmental Sustainability 🌍
A free day of performances, workshops and activities exploring Shakespeare and nature, including a craft and sustainability hub, writing workshops with Letters to the Earth, and choir and monologue performances in the indoor Playhouse. Turn up on the day or book ahead; indoor performances must be booked in advance.

Monday, 22 June

08:30–09:30 (Online, daily Mon–Thu) | London Stock Exchange Group: LCAW Finance Live
Main focus: Sustainable Finance 💰
A daily morning broadcast hosted by Green Finance Institute and London Stock Exchange Group. Join Axel Threlfall, Reuters’s Editor-at-Large, for discussions on how geopolitics, capital and technology are reshaping the global economy and the energy transition. By registration.

08:30–18:30 (Guildhall, London EC2V 5AE) | Climate Action: Climate Innovation Forum
Main focus: Green Tech 🚀, Sustainable Business 💼
The opening flagship of London Climate Action Week, hosted by Climate Action in the historic Guildhall with the City of London and Bloomberg. A Main Stage programme plus parallel Nature, Finance and Circularity stages convene 2,500 global leaders from business, policy, finance and civil society, and mark the official diplomatic opening of the week. Confirmed speakers include Al Gore and UN Climate Change chief Simon Stiell.

08:00–19:30 (The Conduit, 6 Langley Street, London WC2H 9JA) | The Conduit: Climate and the Future of Health
Main focus: Environmental Sustainability 🌍
Hosted by The Conduit, a solutions-led summit on climate's growing impact on health — from heatwaves and air pollution to food systems and wellbeing. Speakers include Roche Chief Sustainability Officer Barend van Bergen and Financial Times Global Health Editor Sarah Neville.

09:00–18:00 (BMA House, Tavistock Square, London WC1H 9JP, and online) | Institutional Investors Group on Climate Change: Summit 2026
Main focus: Sustainable Finance 💰
The third summit from the Institutional Investors Group on Climate Change, sponsored by S&P Global and marking IIGCC's 25th anniversary. Member workshops in the morning, then a plenary with a keynote from J.P. Morgan's Global Head of Climate Advisory, Dr Sarah Kapnick, and a fireside chat with IPCC AR7 Chair Sir Jim Skea. Morning workshops members-only; plenary by invitation; online plenary 13:25–17:00.

09:00–16:30 (EBRD HQ, Five Bank Street, London E14 4BG) | European Bank for Reconstruction and Development: Green Cities Mayors' Meeting
Main focus: Sustainable Living 🏡, Energy Transition 🌿
"Investing in tomorrow: building green and resilient cities for all." Marking a decade of the EBRD Green Cities programme, this high-level conference convenes mayors, private-sector leaders and experts on electrifying transport and heating, low-carbon housing, climate adaptation and the role of AI in responding to climate shocks.

09:00–17:00 (Leonardo Royal London Hotel, St Paul's, 10 Godliman Street, London EC4V 5AJ) | World Green Building Council: Building Solutions Forum
Main focus: Sustainable Living 🏡, Green Tech 🚀
The World Green Building Council's flagship forum, held with UKGBC, bringing 250+ delegates from over 50 nations to scale proven solutions across the built environment. Opening keynote from Lord Adair Turner, Chair of the Energy Transitions Commission.

09:00–17:00 (The Smiths Centre, Science Museum, Imperial College Road, London SW7 2BX) | Jeremy Coller Foundation: Food Day
Main focus: Environmental Sustainability 🌍, Sustainable Business 💼
A dialogue on food system resilience, risk and transformation, presented by the Jeremy Coller Foundation at the Science Museum, convening funders, policymakers, investors and innovators to place food firmly on the climate agenda. Sold out.

10:30–18:00 (KPMG, 15 Canada Square, Canary Wharf, London E14 5GL) | Climate Tech SuperCluster: Cleantech Venture Day
Main focus: Green Tech 🚀, Sustainable Finance 💰
Part of the Climate Tech SuperCluster series, bringing founders, investors and corporates together around deep-tech climate innovation, with startup pitch sessions across pre-seed to Series A. Keynote from Nigel Topping, Chair of the UK Climate Change Committee.

14:00–20:30 (London EC2N) | Lloyds Banking Group: The Future Climate Leaders Forum and reception
Main focus: Sustainable Business 💼, Social Responsibility 🤝
Convened by Headland and Lloyds Banking Group, an afternoon of panels for emerging talent driving the climate transition, with Climate Change Committee CEO Emma Pinchbeck and Global Optimism's Tom Rivett-Carnac. A Climate Leaders Drinks Reception follows from 18:00. Places limited; attendance subject to approval.

Tuesday, 23 June

All Day (23–25 June) (Central London, location confirmed for participants) | United Nations Environment Programme Finance Initiative: Global Roundtable
Main focus: Sustainable Finance 💰
The 19th edition of the UN's Global Roundtable on Sustainable Finance, held with the Green Finance Institute and themed "From Risk to Resilience: Financing the Future." One of the world's largest sustainable-finance convenings, with high-level plenaries on Tuesday 23 June and leadership dialogues across the week. In-person waitlisted; livestream registration open for 23 June only.

All Day (23–25 June) (Protein Studios, 31 New Inn Yard, Shoreditch, London EC2A 3EY) | Blue Earth Forum
Main focus: Green Tech 🚀, Sustainable Business 💼
A flagship innovation hub for LCAW, running three days of curated discussions, workshops, networking and investor engagement, bringing together founders, investors, corporates, creatives and policymakers shaping climate innovation across business, technology, nature, health and society.

⭐ 09:00–17:00 (23–24 June) (Excel London, 1 Western Gateway, E16 1XL) | Reset Connect London
Main focus: Sustainable Business 💼, Sustainable Finance 💰
The flagship event of London Climate Action Week, showcasing the latest in clean energy, green finance and impact investment to accelerate net-zero strategies and sustainable growth. Featuring 400+ speakers including illuminem Founder & CEO Andrea Gori. Opening-night reception 17:00–19:00; also runs Wednesday 24 June.

09:45–12:45 (Walbrook, London EC4N 8BH) | E3G: State of Climate Politics Forum 2026
Main focus: Ethical Governance 🏛, Climate Change 🌳
E3G's flagship climate politics event, now in its third edition. Set between the Bonn negotiations and COP31, a high-level morning briefing structured around three panels and keynotes, asking whether cooperation is still viable in a ruptured world and how to reframe climate action amid divided politics. Registration subject to approval.

12:00–17:30 (Central London; address disclosed on registration) | Climate Group: Opportunity Summit
Main focus: Energy Transition 🌿, Sustainable Business 💼
From the team behind Climate Week NYC, Climate Group launches its inaugural Opportunity Summit with the Mayor of London — a solution-led event for senior business, government and civil society leaders shaping Europe's clean energy competitiveness, built around an Opportunity Town Hall and Implementation Rooms.

13:00–17:00 (Google London, 6 Pancras Square, London N1C 4AG) | Google: Google AI for the Planet
Main focus: Green Tech 🚀, Environmental Sustainability 🌍
A half-day event on how to scale AI solutions for a healthy, resilient planet, hosted by Google Chief Sustainability Officer Kate Brandt, with Google Research's Yossi Matias. Designed to turn leaders into AI practitioners driving climate solutions in their organisations. Register interest; confirmation based on availability.

15:00–18:00 (County Hall, Belvedere Road, London SE1 7PB, 5th floor) | Visa: A longer table: supporting the transition of consumers and SMBs
Main focus: Sustainable Finance 💰, Sustainable Business 💼
A closed-door session in partnership with Sustainable Ventures and enabled by Visa, convening senior banking, fintech and policy leaders on where sustainable finance is translating into commercial benefit. Hosted by Joanna Yarrow, former CSO of IKEA; networking reception follows. Invitation only.

15:30–18:00 (Mansion House, City of London EC4N 8BH) | GLOBE Legislators and SOStainability: Nigeria Climate Investment Summit (NCIS)
Main focus: Sustainable Finance 💰
A high-level climate investment forum bringing together senior Nigerian officials, legislators, governors, regulators, investors, development finance institutions, businesses, and diaspora capital networks.

16:00–17:15 (Protein Studios, 31 New Inn Yard, Shoreditch, London EC2A 3EY) | We Make Change: Change Hour
Main focus: Sustainable Business 💼, Social Responsibility 🤝
Hosted by We Make Change on the Forum Stage at Blue Earth Forum. An interactive "Change Day" session pairing corporate impact leaders with climate startups, plus applications opening for the 2026 ChangeLeaders cohort. Registration subject to host approval.

17:00–18:00 (Somerset House, Strand, London WC2R 1LA) | Futerra’s Solution House, TED Countdown and the Sustainable Entertainment Alliance: Climate storytelling beyond the stereotype
Main focus: Social Responsibility 🤝
Storytellers reshaping the face of climate action ask whether climate has wrongly become a middle-class project. Speakers include Futerra Chief Solutionist Solitaire Townsend and actor and climate activist Fehinti Balogun.

17:15–20:00 (Mansion House, Walbrook, London EC4N 8BH) | E3G: Reception at Mansion House
Main focus: Energy Transition 🌿
A reception hosted by E3G, LinkedIn, the Global Renewables Alliance and the We Mean Business Coalition, closing a day focused on diplomacy, energy and delivering the transition. Invitation only.

19:00–21:00 (Somerset House, Strand, London WC2R 1LA) | Futerra’s Solution House: F*ck Doom Party
Main focus: Social Responsibility 🤝
Brought to you by Futerra's Solutions House — a party for serious optimists, cultural solutionists and anyone tired of fashionable despair, gathering the people still prepared to imagine, fund, film, write and build a liveable future. Yes, there will be merch.

Wednesday, 24 June

All Day (23–25 June) (Central London, location confirmed for participants) | United Nations Environment Programme Finance Initiative: UNEP FI Global Roundtable 2026
Main focus: Sustainable Finance 💰
The second day of the 19th edition of the UN's Global Roundtable on Sustainable Finance, held with the Green Finance Institute and themed "From Risk to Resilience: Financing the Future." One of the world's largest sustainable-finance convenings, with leadership dialogues across the week.

All Day (Online; in-person Mansion House, London EC4N 8BH) | City of London Corporation: Net Zero Delivery Summit
Main focus: Sustainable Business 💼, Sustainable Finance 💰
A flagship summit at Mansion House on turning net-zero commitments into delivery. Virtual attendance open to all; in-person by invitation only.

⭐ All Day (Waddesdon, Buckinghamshire) | The Waddesdon Transition Forum
Main focus: Energy Transition 🌿, Sustainable Finance 💰
An invitation-only gathering at the Rothschild Estate bringing together 150 global leaders from John Kerry to NVDIA’s Head of Sustainability Josh Parker — corporate executives, investors, entrepreneurs and public visionaries — for dialogue and partnerships to accelerate the sustainable energy transition. Invitation only.

08:00–13:00 (Central Hall Westminster, Storey's Gate, London SW1H 9NH) | E3G: Climate and Development Finance Forum
Main focus: Sustainable Finance 💰
"Unlocking finance at scale for country-led transformation" — a high-level dialogue co-convened by E3G, British International Investment, the EBRD and the Country Platforms Hub. Invitation only.

⭐ 09:00–17:00 (23–24 June) (Excel London, 1 Western Gateway, E16 1XL) | Reset Connect London
Main focus: Sustainable Business 💼, Sustainable Finance 💰
The second day of the flagship event of London Climate Action Week, showcasing the latest in clean energy, green finance and impact investment to accelerate net-zero strategies and sustainable growth. Featuring 400+ speakers including illuminem Founder & CEO Andrea Gori.

09:00–14:00 (1 Birdcage Walk, London SW1H 9JJ) | International Climate Councils Network and E3G: Climate Governance Forum
Main focus: Ethical Governance 🏛
The second annual forum hosted by the International Climate Councils Network and E3G, bringing together 200 stakeholders across policy, business, law and academia, with confirmed speakers including former Irish President Mary Robinson and America Is All In Chair Gina McCarthy (keynote).

09:30–11:00 (Somerset House, Strand, London WC2R 1LA) | Futerra’s Solution House and BAFTA Albert: Putting Nature in the Picture: bold stories about our biggest ally
Main focus: Biodiversity 🌳
Presented by BAFTA Albert as part of Solutions House, on how the screen industries can reconnect audiences with nature and drive real-world change. Speakers include actor, writer and comedian Asim Chaudhry and Sky Entertainment's Charly Conquest. Networking breakfast from 09:30.

10:00–11:00 (Somerset House, Strand, London WC2R 1LA) | L’Oréal: Accelerating innovation
Main focus: Sustainable Business 💼, Green Tech 🚀
A rotating, participatory discussion from Solutions House and L'Oréal on building cultures where radical ideas scale and survive. Speakers include L'Oréal Groupe Chief Corporate Responsibility Officer Ezgi Barcenas and Pulpex Managing Director Scott Winston.

12:00–13:30 (Somerset House, Strand, London WC2R 1LA) | Wellcome: Collective Creativity as Catalyst
Main focus: Social Responsibility 🤝
A Solutions House session funded by Wellcome, exploring creativity as a catalyst for climate action, resilience and mobilisation. Speakers include Futerra Chief Solutionist Solitaire Townsend and Nowadays on Earth founder Kalpana Arias.

12:00–13:30 (Somerset House, Strand, London WC2R 1LA) | Wellcome: Making Urban Heat Visible
Main focus: Environmental Sustainability 🌍
A 90-minute workshop from the Wellcome-funded Melting Metropolis project on making urban heat visible as a rallying call for climate action, featuring an imaginative exercise led by artist Harun Morrison and live illustration by Elly Bazigos.

09:00–17:30 (County Hall, Belvedere Road, London SE1 7PB) | SmartCitiesWorld Summit
Main focus: Sustainable Living 🏡, Green Tech 🚀
The premier global forum for city leaders and urban innovators, bringing 3,000+ delegates from over 1,000 cities to accelerate climate action, resilience and digital transformation. Speakers include Greater London Authority Deputy Mayor Mete Coban and former Bristol Mayor Lord Marvin Rees.

16:30–18:30 (Australian High Commission, London WC2B 4LA) | Australian High Commission: COP31 Pacific Partnership
Main focus: Climate Change 🌳, Ethical Governance 🏛
A flagship reception jointly hosted by the Australian and Fiji High Commissions on Pacific-led initiatives building momentum toward COP31. Keynote speakers include the President of Palau, H.E. Surangel Whipps Jr. Invitation only.

⭐ 18:00–20:30 (Globant UK, 70 Victoria Street, London SW1E 6SQ) | illuminem and Globant: AI & sustainability
Main focus: Green Tech 🚀, ESG 📊
Our event with Globant. Can AI actually help the planet, or is it just burning more energy? A panel on what responsible AI for climate action really looks like in practice, with illuminem Founder Andrea Gori, Globant's Facundo Armas, GIST Impact Co-Founder Mahima Sukhdev, and Former Minister of the Environment and Climate Change of Brazil, Izabella Texteira. Come for the debate, stay for the drinks. 

18:30–20:30 (House of Commons, London) | GLOBE Legislators: 35th Anniversary Event
Main focus: Ethical Governance 🏛
GLOBE Legislators marks its 35th anniversary with a celebration at the UK Parliament. By registration.

⭐ 18:45–21:30 (Impact Hub London Euston, 1 Triton Square, NW1 3DX) | 350.org: Time to make polluters pay: ending Big Oil profiteering
Main focus: Climate Change 🌳, Ethical Governance 🏛
Hosted by 350.org, bringing together journalists, campaigners and frontline voices to explore shifting climate narratives, legal breakthroughs and the growing "Make Polluters Pay" agenda — from windfall taxes to climate litigation. Speakers include 350.org's Savio Carvalho and the Fire Brigades Union's Steve Wright, chaired by Climate Home News journalist Megan Rowling, with opening remarks from Fossil Free Media's Jamie Henn. Doors 18:45, event from 19:15; catered networking 20:30–21:30.

Thursday, 25 June

All Day (23–25 June) (Central London, location confirmed for participants) | United Nations Environment Programme Finance Initiative: UNEP FI Global Roundtable 2026
Main focus: Sustainable Finance 💰
The third day of the 19th edition of the UN's Global Roundtable on Sustainable Finance, held with the Green Finance Institute and themed "From Risk to Resilience: Financing the Future." One of the world's largest sustainable-finance convenings, with leadership dialogues across the week.

09:00–17:30 (London Stock Exchange, 10 Paternoster Square, London EC4M 7LS) | London Stock Exchange Group: World Climate Investment Summit
Main focus: Sustainable Finance 💰
Now in its sixth year and co-organised by the World Climate Foundation and LSEG, WCIS convenes global investors, financial institutions and policymakers to convert capital commitments into real-economy investments across key transition sectors.

08:30–17:00 (London Zoo, Regent's Park, London NW1 4RY) | Nature4Climate Coalition: The Nature Hub
Main focus: Biodiversity 🌳, Sustainable Finance 💰
"Invest with Nature for a thriving economy" — brought by the Nature4Climate Coalition, convening business, finance and public-sector leaders on nature-based solutions as a core economic strategy, across a full day of panels and closed-door roundtables. Main discussions by invitation.

09:00–14:00 (1 Lothbury, London EC2R 7DB) | Bank of China: Scaling transition and nature finance
Main focus: Sustainable Finance 💰
Bank of China London Branch's flagship LCAW event, with UNEP FI, the City of London and the Cambridge Institute for Sustainability Leadership, on scaling transition finance, nature finance and climate innovation. Invitation only.

⭐ 12:00–12:30 (Online) | illuminem: AI, data and sustainability: the new engine of business performance
Main focus: Green Tech 🚀, ESG 📊
Our illuminem Data Hub™ launch webinar. We're pulling back the curtain on the new Data Hub, showing how it turns fragmented ESG and sustainability data into something the whole market can finally read: asset managers can spot and sidestep climate risk, corporates can zero in on quick wins, and investors can compare the entire market on a like-for-like basis for the first time. Can't make it to London? This one's for you.

18:30–20:00 (Malaysia Auditorium, Centre Building, LSE, London WC2A 2AE) | LSE’s Grantham Research Institute: Global Trends in Climate Litigation
Main focus: Ethical Governance 🏛
The launch of the Grantham Research Institute's ninth annual report on the expansion, complexity and maturity of global climate litigation, with an author presentation followed by a panel of climate-law experts.

Can't make it to a session in person? Join illuminem's Sustainability Data Hub™ launch webinar.

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