The higher the Thatcham rating of a safety program, the more very likely it can be to lower coverage rates, as the vehicle are going to be harder to steal or crack into. S5 trackers (previously called category 5) are Thatcham’s maximum approved motor vehicle monitoring process accessible to obtain. https://medium.com/@trackerfit11/why-choosing-a-thatcham-tracker-strengthens-vehicle-security-6b79d8a9c256