http://www.bbc.co.uk/news/technology-16969509
The system involves the installation of a small black box into the driver's car which records how they drive.
The measures include monitoring speed, braking severity, cornering and the types of roads used during certain times of day.
This information is transmitted remotely to the insurers, and can also be accessed by users via a website which gives information on overall performance, warning them if they are likely to be moved to a higher premium....
Extreme speeds would be greeted with "a stern email" to the driver.