If a vehicle has been written off it will not be insured, so it’s not possible to drive it on the road. In fact, as you’ll see below, you won’t normally even have access to your vehicle if it’s declared a write-off as it will usually be retained by the insurance company.
A written-off car can only be driven once it has been categorised, repaired to a high enough standard and sold to a new owner with its Cat tag.