Carpetright and Mothercare shares dive on trading worries   Facebook shares slide amid privacy backlash   A pension of 18,000 - or 1,000? The auto enrolment dilemma   UK tech giant Micro Focus plunges in value as shares crash   Betting machine wagers 'should be cut to 30 or less'   Carillion finance directors to be probed by regulator   Melrose pledges 1bn boost to GKN pension fund   UK growth forecast raised by British Chambers of Commerce   Call for stricter rules on doorstep loans   Yi Gang named head of People's Bank of China