The Global Warming Policy Forum has a “laughable record of inaccurate and misleading claims” about climate and energy policy, said one expert.

Quentin Willson has left FairFuelUK, an anti-fuel duty group backed by several MPs, over its "lack of environmental sensibilities" and a report it recently released containing "unforgivable howlers”.

Oil & Gas UK and the Department for Business, Energy and Industrial Strategy have been taking the CCC's advice "out of context" when discussing new North Sea projects, say campaigners.

A climate campaigner said Morgan’s new roles at the bank would be “hypocritical and selfish” unless she pushes Santander to completely phase out its funding of fossil fuels.

May has called on fellow Conservatives to unite behind the government’s climate plans amid backbench opposition - but her own record is mixed.

DLA Piper, whose clients have included Shell, ExxonMobil, and BP, will provide legal services to the UN climate change summit.

The criticism comes despite COP26 President Alok Sharma insisting that the summit would be an "inclusive" event, with “all voices” heard.

Climate activist group Extinction Rebellion is currently protesting against the funding of coal, oil and gas projects around the world by London’s financial sector.

Former UK Prime Ministers David Cameron and Theresa May both lobbied the Bahraini government on behalf of Petrofac, whose co-founder is a major Conservative donor.

The environmental protest group has said it wants to highlight the role of the City of London in financing fossil fuels around the world.