Turning ambition into action
London Climate Action Week 2025 is back this June, bringing together mayors, governors, and global leaders. During the week, we will mark 20 years of C40 Cities and reflect on a decade since the Paris Agreement.
In a time of geopolitical instability, rising disinformation, and growing climate impacts, mayors are redefining what climate leadership looks like. With COP30 on the horizon, the week will spotlight how cities are stepping up and standing together to drive urgent climate action.
C40 mayors are already delivering science-based, people-centered solutions for fairer, healthier, and more resilient urban futures, proving that city-led collaboration works.
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EVENTS
C40, Centre for Liveable Cities and Arup
Arup, 80 Charlotte Street
25 June 2025 | 14:00-15:30 (BST)
C40 and The Conduit
The Conduit, 6 Langley Street
25 June 2025 | 13:00-15:00
C40 and Foreign, Commonwealth, and Development Office
Central London
Invitation only
C40
Central London
Invitation only
C40, Bloomberg and The Earthshot Prize
Central London
Invitation only
C40
Central London
Invitation only
C40, Bloomberg and Foreign, Commonwealth, and Development Office
Central London
Invitation only
SDSN Global Commission for Urban SDG Finance
Guildhall, 71 Basinghall Street
25 June 2025 | 08:00 – 10:00
Invitation only
C40 and Gensler
Gensler Office, 6 Moretown, Thomas Moore Street
25 June 2025 | 16:30 – 18:30
C40 and Uber
Cities Climate Action Summit, County Hall, Belvedere Road
25 June 2025 | 14:20 – 16:30
C40 and UK DESNZ
Central London
Invitation only
C40, Arup and Urban Partners
Arup, 80 Charlotte Street
26 June 2025 | 14:00 – 15:30
Contact us
To send media enquiries, please contact:
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THE LATEST FROM C40
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C40 provides research, analysis, implementation guides and more to support and empower cities to transition towards a green and just economy.