Abstract: According to the invention there is provided and adjustable chair (1) including a chassis (2) onto which the chair is moveable mounted with respect thereto about a common plane normal to the major plane of the chassis, a pair of side walls (8) extending from the chassis and adapted to, in use, prevent accident access to the space between the chassis and the chair from respective sides thereof, CHARACTERISED IN THAT at least one tambour (9, 10) is provided between the front and/or the rear of the chair relative to said side, the or each tambour therefore providing a rigid but moveable barrier to accidental entry into the space between the chair and the chassis.