Great article guys, very informative. Both C and D categories include cars that can be repaired and returned to daily use, or ones that are recommended to be totally scrapped and never allowed back on the road. It is not illegal to repair or return category C or D vehicles back to the road as long as the seller declares the facts and provides evidence that the car has passed a Vehicle Identity Check (VIC). However, HPI advises used car buyers to watch out for unscrupulous vendors with vehicles that have been poorly repaired and possibly pose a serious threat to the safety of its occupants and other road users.