An adjustable seat (1) incorporates a moveable squab element (4). The squab element may be moved from an initial position in which the squab element is flush with the remaining parts of the vehicle seat to a first intermediate position and then to a subsequent second position. The squab is mounted on a first linkage (7) which carries an intermediate support. A second linkage (10) extends from the intermediate support to a seat mount (9) incorporated with the squab element.