UK Stocks-Factors to watch on Thursday, Aug 22

Britain's FTSE 100 index is seen to opening 29 points lower at 7,175 on Thursday, according to financial bookmakers. * BRITISH AMERICAN TOBACCO: Four dominant e-cigarette makers including a unit of British American Tobacco face a probe into the health impacts of their products, as the U.S. House Energy and Commerce Committee asked on Wednesday about the firms' research and marketing practices. * RYAN AIR: Ryanair can still avoid a planned strike by British pil