(Sharecast News) - London's FTSE 100 was down 0.5% at 8,717.99 in afternoon trade on Wednesday.
Advertising firm WPP was the biggest loser on the index after Barclays downgraded the shares to 'underweight' from 'equalweight' and cut the price target to 550p from 700p.

Educational publisher Pearson also fell after...

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