A seat structure (6) for mounting to the load space (3) of an automobile (1) includes a seat cushion (9) which, in use, may be positioned to extend out of an opening to the load space to provide a seat for a person outside the automobile. The structure is particularly intended to provide a seat to the rear of an estate car, SUV or other automobile fitted with a tailgate (4).The seat structure may be removably mountable to the load space of an automobile. The seat structure may comprise mounting assemblies (8) arranged to mount the structure to points at opposite sides of the load space of an automobile. A divider assembly (7) may be pivotally mounted to the mounting assemblies (8) for movement between upright and flat positions. The seat cushion (9) may be movably mounted to the divider assembly for movement between storage and deployed positions.