Hundreds of Extinction Rebellion protesters have occupied the offices of 10 City of London insurance companies.
The activist group is calling on the companies to stop insuring West Cumbria coalmine and East Africa Crude Oil Pipeline.
The protesters gathered outside Standard Bank, where they marched to three high-profile buildings including the Walkie Talkie.
In a "coordinated swoop, activists began "causing disruption" in the office foyers of Ascot, Talbot, Chaucer, Markel, Allied World, CNA Hardy, Tokio Marine Kiln, Sirius International and Lancashire Syndicates.
Some glued themselves to the floors while others staged a sit-in and refused to leave.
Outside the buildings, protesters could be seen waving banners saying “Don’t Insure EACOP” and “Don’t Insure West Cumbria Mine”.
Claude Fourcroy, a spokesperson for Money Rebellion said: “We are calling on all the banks and insurers behind the West Cumbria mine and East Africa Crude Oil Pipelines to cut their ties now.
"Both of these projects will fuel climate breakdown. Lloyd’s of London and the insurers in its market sit at the centre of a web of climate wreckers in the City of London, alongside Barclays and HSBC.”
Fossil Free London was understood to be simultaneously disrupting the Canary Wharf offices of Total Energies, a majority shareholder in EACOP.
Joanna Warrington, campaigner with Fossil Free London said: “We can’t allow London to welcome the climate-wrecking elite when droughts, floods, and wildfires rage across the world.
"London’s banks and finance sector have been ignoring all the warning signs while pouring billions into fossil fuel expansion. Their profit is our loss. Financing new fossil fuel developments is incompatible with a safe future.”
The Met Police has been approached by the Standard for comment.
