Sounds the same as the one I'm considering - Co-Op Bank.
Pay you premium, guy comes and fits a black box. You can check your driving style on-line using a 5 point monitor where Green is good and Red is not. After 90 days they decide whether you get a reduction or extra loading.
Green is 15% refund; light green is 7.5% refund; yellow is stay same; orange is 7.5% loading red is 15% loading.
From the website:
Smartbox records, stores and sends data every day about different aspects of your driving style including:
•your speed on different types of road
•how fast and hard you accelerate or brake
•what times of the day you usually drive
•how quickly you take corners
I'm guessing it must incorporate a satnav to monitor speed. Also apparently 11pm to 6am is the worst time to drive with the smartbox.
It doesn't record indivdual incidents, just trends, so the odd emergency braking or night trip won't make any difference.
You can view your "score" 24/7 so you've got plenty of time to amend your driving style to ensure you stay in the green zone.
Eldest son, may not be too happy, but I am paying his insurance for him so he said he'll give it a go.