The Financial Post reports in its Wednesday edition that Mark Carney has accused U.K. Prime Minister Rishi Sunak of questionable economics over his decision to postpone environmental measures and start drilling for oil in the North Sea. A Bloomberg dispatch to the Post says that speaking to King's College London, Mr. Carney said the U.K.'s plans to delay a ban on new petrol and diesel vehicles was "disappointing" and that the new stance on climate action may deter investment in the U.K. Approving a drilling licence for the Rosebank oil field and promising more "can be called into question from an economic perspective, let alone an environmental one," he added. Mr. Carney, the UN special envoy on climate action, has led global efforts to bring financial markets into the campaign for net zero since he was at the Bank of England between 2013 and 2020. The U.K. was a leading nation in "forging a consensus around net zero," Mr. Carney said. "The government has now fallen back a bit." Mr. Sunak has pushed a ban on new combustion engine cars from 2030 to 2035, postponed requirements for landlords and homeowners to insulate their properties and upgrade boilers, and has promised hundreds of new North Sea drilling licences.