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London's benchmark FTSE 100 index slid 0.6 percent to 7,100.07 points, as markets wait also on a Brexit deal to smooth Britain's exit from the European Union.
In the eurozone, Frankfurt's DAX 30 fell 0.3 percent to 11,493.32 points and the Paris CAC 40 lost 0.6 percent to 5,103.43, also as worries resurface over Italy's economy.