Sept. 21 (Bloomberg) -- U.K. stocks fell for the first time in seven days, led by mining companies Rio Tinto Group and BHP Billiton Ltd. BG Group Plc also dropped.

The FTSE 100 Index declined 14.7, or 0.3 percent, to 5,158 at 8:28 a.m. in London.

Rio Tinto dropped 1.6 percent to 2,693.5 pence. BHP slipped 1.7 percent to 1,720.5 pence. BG Group, the U.K.’s third-biggest oil and gas company, fell 2.6 percent to 1,110 pence.

Last Updated: September 21, 2009 03:35 EDT