When the thieves returned, it is thought all they had to do to open the doors was replay the cloned signal. Mrs Franks, 50, who had installed a security camera at her house a week earlier after attempted thefts, said: "When I replayed the CCTV I saw these young men in baseball caps just walk up and open the doors without any effort and start rifling through my things. Apparently it's happening all the time. My neighbours had the same thing happen twice.