Abstract: A lock includes a locking bolt (21) and a lock body (32, 33). The lock body (32, 33) has a locking space (43) and aligned bores (37, 38) provided on either side of the locking space (43). The aligned bores (37, 38) received the locking bolt (21). A latch member (14) is provided within the lock body (32, 33) to release the locking bolt (21). A transverse bolt member (10) engages with the latch member (14) and thereby controls operation of the latch member (14). The transverse bolt member (10) is also provide within the lock body (32, 33). User operable locking cylinders (6) are operable on the transverse bolt member (10) to move the transverse bolt member (10) axially. The engagement between the latch member (14) and the transverse bolt member (10) is by way of respective engagement surfaces (15, 12a). One of the engagement surfaces is an inclined surface (12a).