The benchmark FTSE 100 closed down 30.40 points today at 4,485.40, its biggest decline in three weeks, after the mining industry aired concern demand for metals from China may slow as the country's government tries to moderate economic growth.
BHP Billiton, one of the world's largest miners, lost 17p to 495.5p.
Other miners also dropped. Anglo American fell 30p to 1,308p, and Rio Tinto declined 45p to 1,337p.
Corus Group, a steelmaker, shed 2.25p to 41p.
Marks & Spencer dropped 12.5p to 264p after the retailer reported sales at stores open at least a year unexpectedly fell 3.4% in the 11 weeks ended March 27.
The insurer Britannic Group also shed 24p to 343p.
Across the Atlantic, trading is currently up as the Dow Jones Industrial Average index so far has gained 26.48 points to 10,407.76.
The S&P 500 index is up 2.68 points to 1,132.12 and Nasdaq's Composite index has so far climbed 6.76 points to 2,036.84.IFAonline
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