In the thrilling conclusion to this saga, I found out yesterday that Hastings did inspect the bike while they had it, after collecting from the Police. They've listed it as a CAT D with £3200 damages, despite the bike sitting with my mechanic just now being repaired for £390. They won't remove the write off.
So now I'm forced into making a claim, losing several years no claims, paying £450 excess and suffering drastically increased premiums for however many years.
They should never have even had my bike. Beyond angry.
Urgh, sounds like an nightmare. Also, £3200 and it's written off!?

Saying that it was all cosmetic. Did they say that your frame is damaged or something or is it a write off because it's too expensive to repair?