(Reuters) – British American Tobacco said on Wednesday it took a 957 million pound ($1.15 billion) impairment charge related to the transfer of its Russian business, pushing half-year earnings of the Lucky Strike cigarette maker 25% lower. The London-based firm, which also makes Camel and Dunhill cigarettes and controlled almost a quarter of the Russian market said in June it was in advanced talks with its distributor in the country to sell the business. No agreement to transfer the shares has been entered into, BAT said. It reported a 25% drop in profit from operations on a reported basis to …