Abstract: A locking device is provided for use in a motor vehicle. A panel is mounted on the floor of the motor vehicle between the vehicle control pedals and the driver's seat, the panel being dimensioned substantially to prevent access to the control pedals. The device includes a hinge mounting for the panel whereby the panel can be hinged out of the way of the pedals and locking means adapted releasably to lock the panel in an operative position in which it prevents access to the control pedals. The locking device includes a vehicle radio theft prevention device comprising a cable adapted for attachment to a vehicle radio or the like and to be fixed releasably to an anchorage provided on the inside of the housing.