SugarPasteMonkey
"That's why the black box technology is a good idea - helping to reward responsible drivers. "
When the black box is fitted, the insurance premium tends to be lower, before the driver has even got into the car and driven it yet. After 3 months, if the driver has been a good driver, they continue to pay the same premiums, whereas if they have driven badly, they can have a further 10% added to their premium. After a further 3 months, the good driver still pays the same amount, while the bad driver can have another 10% increase on his premium, and same again after 9 months.
This means that if by having the black box fitted, your premium is reduced from £4500 to £3000 per year, and you pay installments monthly over 10 months of £300 a month...a bad driver will pay £300 a month for 3 months, then £330 a month for 3 months, then £363 for 3 months and finally £399.30 per month for the remaining 3 months...hence the year has cost the bad driver just over £4k.
This is a punitive measure against bad drivers, not a reward for good driving, and imo, reward tends to encourage better driving more than the fear of punishment.