A new car security system that identifies car owners through their mobile phones is set to revolutionise the fight against car thieves.

Auto-txt immediately identifies a car as stolen if the car is started with the keys but the mobile phone is not present. Most significantly, when the police are following a stolen car, Auto-txt allows them to track the vehicle and prevent it restarting using remote wireless technology once the vehicle ignition is turned off.

It is also the first stolen vehicle protection and tracking system to have been awarded Thatcham's Category 5 accreditation, the new insurance industry standard that is supported by the police. Thatcham is the motor insurance industry research centre which aims to develop research and standards which contain or reduce the cost of motor insurance claims.

The flaw with most current car tracking systems for stolen cars is that they are activated by the driver's key or a device on the key ring. As a result, thieves are now targeting people's car keys - then using them to drive off in their car. In fact, this is now the UK's fastest growing type of car theft - having risen by 80 per cent since 2002 according to the Association of British Insurers.

Category 5 requires that for improved security you need something else in addition to the keys to prove that you are the car's legal owner. In the case of Auto-txt this is via the Bluetooth facility on a mobile telephone.

Once a stolen car is stationary with the engine switched off, police can authorise Auto-txt to disable the vehicle using remote control wireless technology - without having to be with the car.

The Auto-txt product is from GBP279 for the standard tracking system and from GBP349 if the system incorporates the remote disabling feature.