Christian climate activists have been protesting at Church House in Westminster to highlight the Church of England's strategy of staying invested in fossil fuels.
Christian activists also left handprints of fake blood and oil on the offices of Britain's leading arms manufacturer BAE Systems.
Campaigners were protesting against the company's policy of supplying weaponry to conflicts which they say increases the vulnerability of people living on the front lines of climate change.
The action was part of co-ordinated non-violent action with the group Extinction Rebellion at 13 sites across central London.
The actions follow the conclusion of COP27 in Egypt, which is being widely criticised for the presence of representatives of oil and gas companies.
A spokesperson for Christian Climate Action, said: "The Church should be showing moral leadership in rejecting profiting from investments in companies that continue to fuel climate suffering."
Extinction Rebellion spokesperson, Sarah Hart, said: "Behind incomprehensible government decisions to double down on fossil fuel development, sign off new oil exploration licenses and allow the big energy companies to rake in record profits, lies a network of companies and organisations that are profiting from this destructive path.
"While the rest of us worry about the cost of turning the heating on our government is prioritising the profits of the very companies that are jeopardising our climate and environment. But everyday people are way ahead of politicians. They want to be able to heat their homes and they want a future for their children.
"So today, Extinction Rebellion are sending the message that it's time to cut the ties with fossil fuels or lose the social license to operate in the UK."
The final deal agreed at COP27 did not include commitments to "phase down" or reduce use of fossil fuels. The outcome has been described as "disappointing" by the UK's lead negotiator Alok Sharma.