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access control system access systems activated alarm sounders annealed glass areas attack automatic barrier battery beam bolt boom barrier building bullet-resistant burglary call points camera cctv Chapter Chubb Chubb Security clearly closed-circuit television contain control unit crime prevention Criminal Statistics cylinder lock detection and alarm deterrent devices electric electronic emergency lighting emergency luminaires entry equipment escape routes exit fire alarm system fire detection fitted gate glass heat detectors HMSO Home Office Research House ICEL included industrial infra-red detectors installation layout levers locations luminaires manual manual call points master key system monitoring mortice normal occupants offences Office Research Study operate opportunist particularly perimeter police premises protection radiation recommendations recorded risk Road safety security lighting security locks security systems sensor shoplifting shops signal smoke detectors sophisticated space switch theft thief type of detector usually vandalism vulnerable wilful damage zones