An appliance having a casing with an open topped tub located within it, a lid structure including a seal for closing and sealing the tub mounted to the casing, the seal sealing with the top edge of the tub and located at or close to the perimeter of the lid structure, the lid structure including a lid center portion and a frame which circumscribes the lid center portion, the appliance including a gasket, connecting the frame to the lid center portion so that at least part of the gasket forms a free body portion between the frame and the lid center portion, the lid center being free-floating relative to the frame, the appliance including a lid structure supporting mechanism connected to the frame to move the lid structure downwards, and if the lid center portion is prevented from moving downwards, the frame can continue to move downwards.