I took out insurance today with Adrian Flux and they quoted me on a "Cherished vehicle" policy, so the premium came in really low as the prelude is now classed as a classic car

They also offered a "agreed vehicle valuation" for £15 so the insurance company and I agree up front what my car is worth rather than Market value should I need to claim.
As I say you're all probably aware already but thought I would share just in case.