The Cambridge Index fell 1,076.52 points or 5.6% to close at 18293.7, as eight out of the top ten index heavyweights posted weekly losses to their share price.
EXECUTIVE CHANGES: SDI hires former Ultra Electronics CFO as new CFO lse.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from lse.co.uk Daily Mail and Mail on Sunday newspapers.