Shares on London's blue chip index fell by 1.5% as yet more dismal financial news weighed on the market, and concerns grew about the still-rising price of oil.
During the day the FTSE 100 dipped below 5,600, touching levels it hadn’t seen since the end of March.
It finally ended the day 87.56 points lower at 5,620.8.
The 250 also fell, by 85.52 points or 0.9% to 9,361.1.
The City got no help from Wall Street, which sank by more than 1% immediately after opening, and as London was closing was still well underwater.
The Dow was more than 1% down at 4:45pm London time, at 11,929.23, while the Nasdaq was off almost 1.7% to 2,420.55.
Back in London, Wolseley led the decliners at day’s end, with a 5.26% drop to 445.5, followed by Carphone Warehouse, down 5.2% to 203.25; Tate & Lyle, down 5% to 374.25; HBOS, down 4.9% to 282.25; and Thomson Reuters, down 4.4% to 13.82.
The FTSE 100 gainers for the day were Tullow Oil, Antofagasta, British Land, AMEC and British Energy.IFAonline
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