Thanks everyone. Nice to have so much empathy.
Stressing myself out on a Saturday night of all nights though. Reading up about insurers paying out bottom book for write-off cars.
The fact is I bought the car as Approved Used from a main BMW dealer with full BMW service history, 12months warranty with low mileage and A1 condition (£10,486). I'm concerned they'll offer me £9k-ish and not take into account the fact it came from BMW and therefore should command a better residual.
Looking on Autotrader, I can only find independents selling similar spec, age, condition for £10,500 upwards. BUT, I don't want to replace it with anything other than an Approved Used BMW from BMW.
What does everybody think? How can I prepare myself fro a battle?