Cat D needs no notification to anyone apart from your insurance co failure to inform them even tho they will not ask you as its your responsibility to tell them will mean in the event of an accident they may not pay you out ! As not all insurance co will take em, Also dealers won't have vehicles on hpi as they can't finance them, but don't be alarmed cat d do make perfect buys if it had been cat c I would have avoided it.
Also on new cars/vehicles most insurance co will stipulate for the 1st 12 months from new if the vehicle is damaged they will replace the vehicle like for like that's why there are lots of cat d vehicles, we have 2 vehicles both reg on hpi as cat d one is a john cooper special Mini Cooper s, a bird hit the pavement in a skid and it popped the air bag it's worth more now than when we brought it 10 years ago and its still only got 15k on the clock its minta than mint and I've got a 1year old Vw that cost nearly 30k, wing and bonnet was damaged when 6 months old and as it was on Vw finance they just replaced the vehicle it's totally madness and it was than repaired by Vw approved body shop and they stuck a cat d on it, my last astra sportive van was cat d and it was written off by a 3rd party in feb this year the 3rd parties insurance co offered me more than I paid for it, but like I state above I make sure I tell my insurance co that's its a cat d otherwise you run the risk of not being paid regardless.
Also on new cars/vehicles most insurance co will stipulate for the 1st 12 months from new if the vehicle is damaged they will replace the vehicle like for like that's why there are lots of cat d vehicles, we have 2 vehicles both reg on hpi as cat d one is a john cooper special Mini Cooper s, a bird hit the pavement in a skid and it popped the air bag it's worth more now than when we brought it 10 years ago and its still only got 15k on the clock its minta than mint and I've got a 1year old Vw that cost nearly 30k, wing and bonnet was damaged when 6 months old and as it was on Vw finance they just replaced the vehicle it's totally madness and it was than repaired by Vw approved body shop and they stuck a cat d on it, my last astra sportive van was cat d and it was written off by a 3rd party in feb this year the 3rd parties insurance co offered me more than I paid for it, but like I state above I make sure I tell my insurance co that's its a cat d otherwise you run the risk of not being paid regardless.