London share prices plummeted today as global stock markets were routed again amid fears of a financial crunch in China. Analysts talked of ‘panic mode’ as the FTSE 100 index of leading shares plunged 180.2 points to close at 6,187.65, a fall of 2.8 per cent. The day’s deficit was widened by a negative start on Wall Street, where the Dow Jones industrial average followed up yesterday’s 2 per ce...