A London court on Friday convicted a 24-year-old man for a brazen raid on a jewellery store which netted gems worth 40 million pounds.Aman Kassaye was found guilty of kidnap, conspiracy to rob and possessing a firearm after he forced a shop assistant to steal valuables during the raid at the exclusive Graff jewellery shop last August.Kassaye used a professional make-up artist to disguise his appe