(Reuters) - FTSE 100 fell on Thursday as consumer giant Unilever said the coronavirus lockdown measures took a toll on its quarterly sales, setting a cautious tone ahead of bleak business activity readings.On a busy day for earnings and economic data, the blue-chip FTSE 100 index dipped 0.5%, while the domestically focused FTSE 250 index gained 0.1%.Shares in Unilever Plc dropped 5.2% after the company pulled its full-year forecast, and added that a sharp decline in shopping and restaurant..