Motorbike gangs targeted two Chelsea shops in just over 24 hours at the weekend.
At 1am on Saturday, four motorbike riders attempted to rob Theo Fennell jewellers in Fulham Road. They tried to get in using sledgehammers, but were unable to gain entry.
At 1.30am the next night, thieves used a concrete slab to break into handbag shop Anya Hindmarch in Pond Place.
Riding an orange motorbike, a silver moped and driving a Ford-type car, six thieves made off with an undisclosed amount of goods.
Notting Hill CID is investigating.