Abstract: This invention relates to an access control system. More particularly, the invention relates to an access control system and to a a component for an access control system. An access control system includes a cubicle defining means mountable adjacent an access opening to a premises, the cubicle defining means defining a cubicle (24) and an opening (26) which is arranged transversely to the access opening (28) of the premises and a closure member (16) pivotally arranged relative to the access opening (28) to be pivotal through a predetermined arc, an included angle of the arc being an acute angle, the closure member (16) being pivotal. between a first position at one end of the arc, in which the access opening (28) is closed off and a third position at the other end of the arc, past a second, intermediate position.