FTSE 100 Index, British benchmark stock market gauge, Wednesday declined by 1.40 percent, or 93.35 points, to 6571.19, as China's currency yuan continued to fell significantly against U.S. dollar.
On the same day, the Office for National Statistics released data and showed that British unemployment rate was 5.6 percent in the second quarter (Q2) of 2015, little changed compared with the first quarter (Q1) this year.
But the country saw 1.85 million unemployed people, 25,000 more than for January to March 2015.
Glencore's share price decreased by 5.65 percent topping the losers of the blue chips.
Prices of ARM Holdings, International Consolidated Airlines Group, Uniliver and 3i Group dropped by 4.53 percent, 4.37 percent, 4.26 percent and 3.63 percent respectively.
Randgold Resources led the top gainers of the blue chips with a share price increase of 5.41 percent, followed by Babcock International Group (1.53 percent), Fresnillo (1.30 percent), G4S (1.20 percent) and BP (0.81 percent).
Trading volume in FTSE 100 companies was slightly smaller than its 30-day average. And the index has gained 2.53 percent so far this year.