Thatcham Cat 1 systems are needed when you need protection no other system can offer the Thatcham cat 1 systems have a dual immobiliser and a full battery back up siren as standard. We supply Thatcham Cat 1 systems from all the major brands in the uk Cobra, Clifford, Toad, Sigma, Viper. All these systems come with a long warranty and they are 100% reliable when fitted correctly. The Clifford systems offer a dual zone proximity sensor as standard to give you the best possible coverage and warn away any unwanted visitors near your car. Most of the Thatcham range can also have Microwave sensors, Tilt Sensors, Glass Break Sensors and window closure when alarming. We offer a full mobile service fitting Thatcham Cat 1 alarms in Essex.