Abstract: A lock which includes a bolt, a catch, a handle for manually moving the catch from an operative position to an inoperative position, first link elements, and electrically actuable elements for causing movement of the first link elements between first and second positions, the first link elements, at the first position, translating movement of the handle in a first direction into movement of the bolt from a locked position to an unlocked position and, at the second position, allowing handle movement in the first direction without corresponding movement of the bolt.