Madeleine McCann are “on tenterhooks” after police informed them they had relaunched the hunt for her remains in Portugal.Kate and Gerry face an agonising wait after three wells were searched in Vila do Bispo – just a 10-minute drive from the resort where the toddler was snatched.But the McCanns have still not been told on what grounds the police were acting. A family source said: “It is a period of prolonged agony.