FTSE 100 Index soared 1.48% to trade at 5676.80 after UK factory output posted an increase of 1.2% in May on a monthly basis compared to expectations for a 0.1% decline. Unexpected jump in Italian industrial production also supported UK stocks. Barclays added 2.1% as the firm's former CEO agreed to forgo deferred bonuses after LIBOL scandal. Marks & Spencer Group Plc rose 2.2% as its head of general merchandise said she will step down after announcing the largest decline in non-food revenue since 2008.