Four of the world’s richest nations will send a delegation to South Africa as soon as next week to seek a deal to begin closing the country’s coal-fired plants, according to people familiar with the matter. Officials from the US, UK, France and Germany are looking for an agreement with Eskom Holdings SOC Ltd., which generates almost all of South Africa’s power from a fleet of 15 coal plants. Any deal struck could be announced during the United Nations climate talks known as COP26, set to start in Glasgow, Scotland, on Oct. 31, one of the people said.