Famous names including Stephen Fry, Emma Thompson and Mark Rylance have joined activists and businesses in calling on the UK's big five banks to stop financing new oil, gas and coal expansion. Make My Money Matter, a campaign set up by Richard Curtis, the screenwriter, director and Comic Relief co-founder, has written to the chief executives of HSBC, Barclays, Santander, Nat West and Lloyds to urge these banks to "stop financing fossil fuel expansion". Curtis said they wanted to raise public awareness of "the dangerous relationship between UK banks and the fossil fuel industry". Members of the public are being invited to join forces with celebrities, politicians, campaigners and business leaders by signing the open letter. The call comes days after research indicated that banks and finance institutions that had signed up to net-zero pledges were still investing heavily in fossil fuels. Make My Money Matter pointed to a report in February 2022 from the campaign group Share Action, which claimed that in 2021 HSBC, Barclays, Santander, Nat West and Lloyds, between them provided almost $16bn (£12.9bn) in finance to the 50 largest oil and gas companies that were expanding production.

Curtis's group said this was "despite clear guidance from the International Energy Agency that we cannot develop new oil and gas fields if we are to limit global warming to below 1.5C degrees". The Share Action report also stated that between 2016 and 2021 the five UK banks financed the top 50 oil and gas expanders to the tune of a total of $141bn (£114bn). This is despite surveys that have indicated a growing public demand for banks to act on the climate crisis. Almost a third (29%) of the HSBC, Barclays, Santander, Nat West and Lloyds, customers surveyed by Make My Money Matter said they would switch their bank if they discovered it was financing fossil fuel expansion. Meanwhile 86% did not think their bank was doing enough to tackle the climate emergency.

In addition to Fry, Thompson and Rylance, the high-profile signatories included the musician Brian Eno, the naturalist and presenter Chris Packham and Green MP Caroline Lucas. Businesses, activists and charities that signed included Just Stop Oil, Greenpeace UK, Save the Children UK, Ecotricity, Ella's Kitchen, and Triodos Bank. Signatories pledge not only to campaign for change but also to switch to banks that do not finance fossil fuel expansion. Curtis said: "We hope this weird and wonderful coalition of activists and actors, businesses and brands, celebrities and climate champions puts a fire under the banks to stop them setting fire to the world."

HSBC said it announced restrictions on oil and gas financing last month, and the bank said Make My Money Matter was quoted in a BBC News report apparently welcoming the policy. A spokesperson for HSBC said: "HSBC aims to reduce emissions in line with a 1.5C pathway to net zero while promoting energy security, affordability and access. Our 1.5C-aligned financed emissions targets and updated energy policy mean we will no longer provide new finance or advisory for new oil and gas fields or related infrastructure, or for the most carbon-intensive oil assets." Lloyds had announced in October that it would not support direct financing to develop new oil and gas fields. It updated its climate policy to make the change. A Nat West spokesperson said: "We no longer lend to, or underwrite, coal, major oil and gas producers, unless they have a credible transition plan in line with the Paris agreement, which has resulted in us committing to exit almost £1bn of fossil fuel financing."