The UK would end government-funded financial support for overseas oil, natural gas and coal projects under a plan announced this month by Prime Minister Boris Johnson as the country continues to jockey for position in the global fight against climate change. 

The policy would end taxpayer support for export finance, aid funding and trade promotion of foreign fossil fuel projects. Over the last four years, the government said it has supported 21 billion pounds, or about $28 billion, worth of UK oil and gas exports through trade promotion and export finance. 

The government has launched a review of the policy with the industry and other stakeholders. The goal is to implement the policy by the start of the United Nations Climate Change Conference in November 2021, which will be...