Things are hotting up in the Bake Off tent as the remaining ten bakers do their best to wow Paul Hollywood and Mary Berry with some unusual flavour combinations for their tartes tatin. Baking know-how is the all important ingredient for coming through the technical challenge unscathed. Mary's treacle tart seems simple enough, but its lattice top proves to be the undoing of some of the bakers. So the pressure is on - a showstopping tart is no easy task when baked under the gaze of Paul and Mary, but it is the bakers' best chance to achieve the accolade of Star Baker, and more importantly to avoid going home.