Thatcham Cat S5+ is the last of the new classifications for stolen vehicle tracking. Having all of the same features as the new Thatcham S 5 tracking device. The Thatcham S 5 + stolen vehicle Tracker system comes with remote immobilisation.  If the tag is not present when starting the vehicle, then you will receive a call from the 24hr control centre to authorise movement. If this is a theft then they will be able to track your vehicle in live time liaising with the Police. When the vehicle comes to a stop and only when safe to do so the 24hr control centre can remotely immobilise your vehicle enabling the Police to recover your vehicle instantly. Some of the Thatcham category S5+ systems have passive immobilisation option which means that if the Driver Identification Tag is not present then the vehicle will not start.