An elevator assembly, comprising: an elevator car arranged to move in an elevator shaft; a counterweight coupled to the elevator car and arranged to move upwards and downwards in the elevator shaft; a safety device located on a roof of the elevator car and moveable between a deployed position, in which it extends away from the roof of the elevator car, and an undeployed position in which it is stowed on the roof of the elevator car; characterized by: a locking handle positioned within the elevator shaft, and connected to a first end of a tension member (12; 212a, 212b); a blocking stop (14; 214a, 214b), which is connected to a second end of the tension member (12; 212a, 212b), and which is moveable between an inactive state, in which the tension member (12; 212a, 212b) holds the blocking stop (14; 214a, 214b) in a position in which it does not limit downwards movement of the counterweight, and an active state, in which tension in the tension member (12; 212a, 212b) is reduced to allow the blocking stop (14; 214a, 214b) to move to a position in which it limits downwards movement of the counterweight; and a safety switch arranged such that, when the safety device is in the deployed position, the safety switch is triggered and thereby causes the locking handle to move so as to reduce tension in the tension member (12; 212a, 212b), thereby allowing the blocking stop (14; 214a, 214b) to move into the active state. an elevator car arranged to move in an elevator shaft; a counterweight coupled to the elevator car and arranged to move upwards and downwards in the elevator shaft; a safety device located on a roof of the elevator car and moveable between a deployed position, in which it extends away from the roof of the elevator car, and an undeployed position in which it is stowed on the roof of the elevator car; characterized by: a locking handle positioned within the elevator shaft, and connected to a first end of a tension member (12; 212a, 212b); a blocking stop (14; 214a, 214b), which is connected to a second end of the tension member (12; 212a, 212b), and which is moveable between an inactive state, in which the tension member (12; 212a, 212b) holds the blocking stop (14; 214a, 214b) in a position in which it does not limit downwards movement of the counterweight, and an active state, in which tension in the tension member (12; 212a, 212b) is reduced to allow the blocking stop (14; 214a, 214b) to move to a position in which it limits downwards movement of the counterweight; and a safety switch arranged such that, when the safety device is in the deployed position, the safety switch is triggered and thereby causes the locking handle to move so as to reduce tension in the tension member (12; 212a, 212b), thereby allowing the blocking stop (14; 214a, 214b) to move into the active state. a locking handle positioned within the elevator shaft, and connected to a first end of a tension member (12; 212a, 212b); a blocking stop (14; 214a, 214b), which is connected to a second end of the tension member (12; 212a, 212b), and which is moveable between an inactive state, in which the tension member (12; 212a, 212b) holds the blocking stop (14; 214a, 214b) in a position in which it does not limit downwards movement of the counterweight, and an active state, in which tension in the tension member (12; 212a, 212b) is reduced to allow the blocking stop (14; 214a, 214b) to move to a position in which it limits downwards movement of the counterweight; and a safety switch arranged such that, when the safety device is in the deployed position, the safety switch is triggered and thereby causes the locking handle to move so as to reduce tension in the tension member (12; 212a, 212b), thereby allowing the blocking stop (14; 214a, 214b) to move into the active state.