Three mode lock

A door lock having a lock body, an outer handle for operating the lock from an outer side of the door, an inner handle for operating the lock from an inner side of the door, and a mechanism inside the lock body to allow the lock to have a passage mode wherein the lock is operable by either handle, a privacy mode wherein the lock is operable by the inner handle but not the outer handle, and a deadlock mode wherein the lock cannot be operated by the handles, the mechanism comprising an outer hub operatively associated with the outer handle, an internal hub operatively associated with the inner handle, both the internal and outer hubs mounted adjacent to either the inner handle or the outer handle, and a locking member movably engageable and disengageable with the outer hub and the internal hub, characterised in that when the lock is in the deadlock mode the locking member is maintained in engagement with both the internal and outer hubs to prevent operation of the lock by the handles, and further characterised in that when the lock is in the privacy mode, engagement of the locking member with both the internal and outer hubs prevents operation of the lock by the outer handle but upon operation of the inner handle the locking member is disengaged from the hubs thereby returning the lock to the passage mode wherein the locking member is disengaged from both the internal and outer hubs.