U.K. shares advanced on Monday trading session after recording a weekly drop last week as mining companies led the rally overshadowing notable drop of British Broadcasting Group Plc. The benchmark stock index FTSE 100 rose as much as 0.5% to 6,845.41 as of 2:44 p.m. London time following last week's 0.1% decrease, while the broader FTSE All-Share gauge jumped 0.5%.