Bank.Green scores banks worldwide on fossil-fuel lending using BankTrack data and lists greener alternatives by country. Moving your money is one of the few levers an individual has over the companies that make plastic feedstocks. In the UK, Make My Money Matter closed in March 2025 and its closure page points to Bank.Green and Finance Innovation Lab.
Honest caveat: like Market Forces in Australia, it measures fossil fuels, not petrochemicals or plastics specifically, and it is a trading name of Finance.Green rather than a charity.
How to start: bank.green/