BP Plc, the second-largest fuel retailer in the U.K., said it has run out of the main grades at almost a third of its stations in the country following days of panic buying. “With the intense demand seen over the past two days, we estimate that around 30% of sites in this network do not currently have either of the main grades of fuel,” BP said in a statement Sunday. The London-based company said most of its 1,200 sites in the U.K. remain supplied and open. A shortage of truck drivers, which had already left some British supermarkets unable to fill their shelves, began to hit fueling stations late last week. BP and Exxon Mobil Corp. were among companies saying the driver shortage had affected operations at their gas stations, while EG Group said it would limit customers to 30 pounds ($41) of fuel, enough to fill about one-third […]