A latch arrangement includes a lever movable in response to movement of a door lever. A controller is configured for selectively preventing movement of the lever. The controller includes a mono-stable blocking element in the form of a bi-metallic strip which can be operated such that a distal end acts to block movement of the lever. The controller also includes a bi-stable blocking element having a nib that can be moved to an extended position to block movement of the lever. Both blocking elements can be operated at the same time. When either of the blocking elements are arranged in the path of the release lever, unlatching of the door is prevented.