Two days earlier, a woman and a male accomplice stole at least 10 handbags worth thousands of pounds each after she smashed through the glass door of Italian fashion retailer Salvatore Ferragamo. In October last year four men rammed the front doors of Hindmarch's store in Ledbury Road, Notting Hill, grabbing goods worth £20,000. Detectives believe there is a loosely linked group of up to 50 individuals who are staging the raids. Witnesses said last night's attack was carried out by two men on a moped. They were wearing light-coloured crash helmets and grey hoodies. Shops are being advised not to display items in windows overnight and to install shutters. There have been more than 60 robberies at boutiques and jewellers in Mayfair, Knightsbridge and Chelsea in the past few years, despite efforts by shop-owners to improve security.