British FTSE 100 index tumbled on Monday, weighed down by disappointing manufacturing data from China amid political worries over France and the Netherlands. Banking sector contributed significantly to the downside with Lloyds Banking Group tumbling 3.2% and Royal Bank of Scotland Group plunging 4.4%. Miners were also falling as Vedanta Resources lost 6% and Rio Tinto shed 5.2%. At the moment of writing FTSE 100 trades 2.29% or 131.87 points down at 5,640.37.