What Insurance write-off means for you
Categories A and B mean the car must never go back on the road. A is scrap; B is broken for parts, with the body shell crushed. Categories S and N are repairable: S means structural damage, N means non-structural damage. Before October 2017 the codes were C and D.
A repaired Cat S or N car can be driven legally, but you must tell your insurer. Check the category before buying: the free check doesn't cover write-offs, but a Full Check (£9.99) does.