Well like a total numpty I've been getting insurance quotes for my new car based on my NCD from my other car policy, forgetting that I'm keeping the other car and that I'd have to start a new policy on the new car with zero NCD.
DOH!
My quotes jumped from the 300 mark to 600 and some cheeky bastages even wanted 900 ! WTF!!!

What a stupid oversight.
Anyhoo, disaster averted.
I checked Tesco out rather as through a compare site and they ask if you have any NCD on another car that isn't the relevant policy you're getting a quote on.
They came in at £310.

Plus I get my clubcard points

(man I'm so hooked on Tesco clubcard points, they make a huge difference at Christmas time)