Fresnillo was heading lower as an attempt to reinforce mine safety meant that the miner saw silver production fall by 5.8% in the three months to the end of September.As such, the firm lowered its 2011 silver production guidance from 44m ounces to 41m ounces.Fellow miner BHP Billiton was also lower after giving the green light for US$1.2bn to be invested in the first phase of the Olympic Dam Project to develop an open pit mine in South Australia. ENRC was the best performer, rising over 7% after yesterday announcing that it plans to complete another transaction with its founding shareholders by taking over a Kazakh coal miner in a deal valued as much as $600m. Engineer Weir was close behind as investors gained confidence amid hope of increased demand in China. Sales growth decelerated across all divisions at Burberry in the second quarter, as the firm revealed that wholesale - which accounts for over a quarter of group revenues - would see a significant slowdown.Despite this, the British luxury brand was on heading up more than 2.5% as sales growth was still strong over the first half as a whole, at 30%.NRFTSE 100 - RisersEurasian Natural Resources Corp. (ENRC) 669.50p +7.12%Weir Group (WEIR) 1,743.00p +4.56%Kazakhmys (KAZ) 919.00p +4.02%Antofagasta (ANTO) 1,120.00p +3.99%Randgold Resources Ltd. (RRS) 6,665.00p +3.98%Royal Bank of Scotland Group (RBS) 26.24p +3.72%Aviva (AV.) 336.80p +3.54%InterContinental Hotels Group (IHG) 1,115.00p +3.53%Xstrata (XTA) 967.10p +3.33%IMI (IMI) 810.00p +3.32%FTSE 100 - FallersMan Group (EMG) 156.70p -5.72%Tullow Oil (TLW) 1,355.00p -3.01%Fresnillo (FRES) 1,657.00p -2.47%British American Tobacco (BATS) 2,768.50p -1.76%International Power (IPR) 326.70p -1.60%Wolseley (WOS) 1,695.00p -1.57%United Utilities Group (UU.) 609.00p -1.54%SABMiller (SAB) 2,259.50p -1.40%Reckitt Benckiser Group (RB.) 3,300.00p -1.35%Smith & Nephew (SN.) 573.50p -1.29%NR