An aid worker with joint UK-French nationality has been freed in Sudan's Darfur region after five months. Gauthier Lefevre, 35, who works for the International Committee of the Red Cross, was the last foreign hostage being held in Darfur. <br/><br/>He had spent longer in captivity than any other aid worker in the region but is said to be in good health. Two other French hostages were freed in Darfur on Sunday, after being seized in neighbouring Central African Republic last November.<br/>