Cheryl Cole has upgraded the security at her Surrey mansion, the Sun reports. Cole is continuing her recovery from malaria and insiders say she has installed new heat sensors and cameras as well as hiring private guards to patrol the premises. "Cheryl has made a few changes at home. She is spending more time there than ever while she recuperates," a source explained. "She hasn't received any threats but thought it wise to update all the precautions. She believes a more secure domestic situation will help her return to full strength sooner."
