A locking device comprising - a hook bolt arranged on a bolt pivot and comprising hook bolt connectors - a catch mechanism (10, 10') for blocking the bolt to prevent unauthorized opening of a door, the catch mechanism (10, 10') comprising - a follower for operating the bolt between a locked state in which the bolt is extended and an unlocked state in which the bolt is retracted, the follower comprising follower connectors for engaging with the hook bolt connectors; - a catch configured to block the follower for preventing movement of the bolt in the locked state; - a control member for operating the follower and the catch; wherein the catch mechanism (10, 10') further comprises - a first connector for connecting the control member to the catch and operating the catch, the first connector comprising a first contact surface on the control member and a second contact surface on the catch, and - a second connector for connecting the control member to the follower and operating the follower during movement of the control member along a path, wherein the second connector comprises an opening and a protrusion extending into the opening, the opening being larger than the protrusion so that a play is formed in which the protrusion is able to move without contacting a wall of the opening, and wherein one of the opening and the protrusion is arranged on the control member and the other is arranged on the follower and wherein further the second connector comprises the play so that the control member at a first portion of the path operates only the catch for moving from a locking position to an open position for unblocking the follower, and so that the control member at a second portion of said path operates the follower for moving the bolt from the locked state to the unlocked state. - a hook bolt arranged on a bolt pivot and comprising hook bolt connectors - a catch mechanism (10, 10') for blocking the bolt to prevent unauthorized opening of a door, the catch mechanism (10, 10') comprising - a follower for operating the bolt between a locked state in which the bolt is extended and an unlocked state in which the bolt is retracted, the follower comprising follower connectors for engaging with the hook bolt connectors; - a catch configured to block the follower for preventing movement of the bolt in the locked state; - a control member for operating the follower and the catch; - a follower for operating the bolt between a locked state in which the bolt is extended and an unlocked state in which the bolt is retracted, the follower comprising follower connectors for engaging with the hook bolt connectors; - a catch configured to block the follower for preventing movement of the bolt in the locked state; - a control member for operating the follower and the catch; wherein the catch mechanism (10, 10') further comprises - a first connector for connecting the control member to the catch and operating the catch, the first connector comprising a first contact surface on the control member and a second contact surface on the catch, and - a second connector for connecting the control member to the follower and operating the follower during movement of the control member along a path, wherein the second connector comprises an opening and a protrusion extending into the opening, the opening being larger than the protrusion so that a play is formed in which the protrusion is able to move without contacting a wall of the opening, and wherein one of the opening and the protrusion is arranged on the control member and the other is arranged on the follower - a first connector for connecting the control member to the catch and operating the catch, the first connector comprising a first contact surface on the control member and a second contact surface on the catch, and - a second connector for connecting the control member to the follower and operating the follower during movement of the control member along a path, wherein the second connector comprises an opening and a protrusion extending into the opening, the opening being larger than the protrusion so that a play is formed in which the protrusion is able to move without contacting a wall of the opening, and wherein one of the opening and the protrusion is arranged on the control member and the other is arranged on the follower and wherein further the second connector comprises the play so that the control member at a first portion of the path operates only the catch for moving from a locking position to an open position for unblocking the follower, and so that the control member at a second portion of said path operates the follower for moving the bolt from the locked state to the unlocked state.