Sarah Beeny revisits Paul and Clare Baker, whose house in Essex was cracking apart and infested with rats. Paul and Clare Baker bought their house in Essex as the perfect home for their four children, but peeling back the wallpaper revealed a terrifying crack all along the back of the property. It turned out their dream home was sitting on six metres of sludge and splitting in half. Sarah and her team discovered that the problems literally ran very deep, and they also tackled a rat infestation, sewage seeping into the ground floor, and black mould that made the children ill. A year on, Sarah revisits the family to see if they are finally free of their problems.

• Sarah Beeny