AlQa'dah 23, 1435, September 18, 2014, SPA -- Britain's top equity index edged lower on Thursday, lagging gains elsewhere in Europe, as uncertainty over an independence vote that got under way in Scotland pegged back UK stocks, Reuters reported. The blue-chip FTSE 100 index fell by 0.2 percent, or 10.50 points, to 6,770.40 points in early session trading. That compared with advances of 0.4 percent on Germany's DAX and 0.2 percent on France's CAC. European stock markets were lifted by the U.S. Federal Reserve's renewed pledge to keep interest rates ultra-low for a "considerable time".