A first embodiment provides a manually operable castor assembly for a hospital bed, including a wheel unit fittable to a bed frame and provided with a lock actuator. A sensor unit is provided with a trigger element and a sensor element, the trigger element being located on the manually operable brake actuator and the sensor element being located on the wheel unit. Another embodiment provides a manually operable safety side panel assembly including a hinge assembly coupled to the panel element and attachable to a bed frame, and a sensor unit including a trigger element and a sensor element, the trigger element being located on the manually operable actuator and the sensor element being located on a part of the side panel or hinge assembly. Monitoring apparatus monitors the manually operable bed safety device and including a control unit coupled to the sensor unit and an indicator unit controllable by the control unit and operable to give an indication of the state of the device.
