LCAW 2026 - Key Outcomes.

London Climate Action Week (LCAW) has become Europe’s biggest city-wide gathering of climate decision-makers and change-makers, bringing people together to reflect on progress, celebrate wins, and prepare for what’s next. This year, however, LCAW unfolded against the backdrop of one of the UK and Europe’s most severe heatwaves, with the Met Office issuing a Red Extreme Heat Warning for a record three consecutive days. The timing made the week’s discussions feel less theoretical and more immediate than ever.

Running from 20-28 June, the eighth edition of LCAW became the largest Climate Action Week to date with over 75,000 in attendance across over a thousand events. This year’s theme “Cooperation in a Fragmented World” emphasised the need for stronger partnership and collaboration to accelerate the global sustainability transition and set the tone for the week’s outcomes.

LCAW Highlights and Outcomes.

The week opened with the Climate Innovation Forum at London’s historic Guildhall. The Forum brought together leaders from governments, finance, business, and civil society to discuss how capital investment can accelerate the clean energy transition. Speakers included Mayor of London Sir Sadiq Khan, Chair of Climate Change Committee Piers Forster, and European Climate Foundation CEO Laurence Tubiana.

On Tuesday, UN Secretary General Antonio Guterres delivered a special address, emphasising that long-standing fossil fuel dependence is driving worsening climate conditions and arguing that accelerating the renewable energy transition is the only viable path forward. The same day, 41 Mayors from cities across the world including London, Melbourne, Athens, and Seattle launched the Global Urban Data Centres Pact - a coalition of leaders committed to managing data centres strategically, minimising their environmental footprint while protecting communities from rising costs and pollution.

Methane – a greenhouse gas roughly 80 times more potent than CO2 (GWP20) – was a recurring focus throughout the week. A high-level convening on Wednesday brought leaders together to build momentum ahead of COP31, with calls to action centred on stronger standards, mitigation measures, and solutions spanning fossil fuels, agriculture, and waste.

Beyond its support for events throughout the week, Bloomberg Philanthropy announced a $285 million commitment to help scale clean energy fast enough to meet surging global demand, with an additional $45 million to expand clean air initiatives.

LCAW also saw the launch of the Electrify Now campaign led by the Global Renewables Alliance and supported by the Global Wind Energy Council. The campaign’s goal is to increase electrification of the world’s energy system by 35% by 2035 by prompting stakeholders to raise their ambition and take the necessary action to achieve this goal. A huge challenge but vital shift given that to date, most energy has come from fossil fuel combustion (in cars, trucks, planes, ships, process heating, building heating). It calls for stakeholders to develop and adopt the necessary policies, invest in renewable energy and modernised electricity grid and storage, advance international cooperation, and mobilise investment and finance at scale.

LCAW 2026 Ahead of COP31.

If this week made one thing clear, it is that the conversations, partnerships, and commitments shaping climate action don’t have to wait for COP31.

From a climate NGO’s perspective, there is real relief in watching so many initiatives, partnerships, and commitments take shape in a single week, without the months of negotiations and consensus-building that multilateral processes – under which the UNFCCC operates – typically demand. It is a sentiment echoed by LCAW Steering Group Chair Nick Mabey, who put it plainly “You don’t need to have consensus to get things done, because people are forming different coalitions and moving different pieces forward”. It is a fitting continuation of the ideologies behind COP30, widely dubbed the “COP of Implementation” – proof that the shift from ambition to delivery is happening.

The progress made in a week like this should not overshadow how far we still have to go. The gap between current commitments and what science demands remains large. But what LCAW 2026 demonstrated is that a movement is forming across finance, cities, industries, and civil society. For businesses and membership bodies, the transition is already happening – those who engage now will help shape it, while those who wait will be shaped by it.

CAFA exists to provide the necessary support that membership bodies would need to navigate this space and take their first climate action. Join CAFA today to access free resources, support, and peer-to-peer network.