Abstract: A stairway (1) comprising a plurality of steps (2) each defining a top surface or tread (3) is converted into a lift platform by employing a mechanism concealed beneath an envelope defined by the treads of all of the steps to guide each step of the plurality vertically from a stairway configuration in which the steps form a stairway enabling access from a lower (7) level to an upper level (8) to a flat configuration in which the top edge of each step is substantially in a horizontal plane level with one of the lower and upper levels from which a wheelchair user may wish to travel to the other of the lower and upper levels. As a result, a wheelchair user may move horizontally from the said one of the lower and upper levels on to a platform defined by the top edges of the plurality of steps in the flat configuration. The stairway and flat configurations occupy the same footprint.