Treasury leak reveals rift between Johnson and Sunak over costs of zero-carbon economy

With weeks to go before the Cop26 climate summit, documents show PM being warned about the risks of damage to the UK from green investment

Confidential documents leaked to the Observer reveal an extraordinary rift between Boris Johnson and his chancellor, Rishi Sunak, over the potential economic effects of moving towards a zero-carbon economy, with just weeks to go before the crucial Cop26 climate summit.

As Johnson prepares to position the UK at the head of global efforts to combat climate change and curb greenhouse gas emissions as host of the Glasgow Cop26 meeting, the documents show the Treasury is warning of serious economic damage to the UK economy and future tax rises if the UK overspends on, or misdirects, green investment.