1600 GMT - Domestic refineries are increasingly important for the U.K. in the context of rising turbulence around the world, says Elizabeth de Jong, head of business association Fuels Industry U.K., whose members include majors like BP, Shell and ExxonMobil. The G-7 group of major economies is to release 100 million barrels of crude oil and fuel from their emergency stocks within four months and not restrict oil exports, France's Emmanuel Macron said Friday, in a bid to bring down soaring diesel prices and ward off a U.S. export ban. "With global uncertainty increasing, now is the time for the U.K. government to show it is taking energy security seriously," De Jong says, noting that the country imports more than half the diesel it consumes. She calls on Westminster to enact measures to "level the playing field" for British refineries.