Agreed value changes: just a personal experience.

[Northy]

Get John Glynn to do you an independent valuation. That’s what I have my insurance valuation agreed against.

https://www.porschevaluations.com/

[Ashley James]

I insure via A Plan in Worcester and they’ll insure your car for whatever you want within reason, so actual value isn’t so much a factor as the amount you’ve insured for. The more the agree value, the higher the premium. I think they use Hagarty as a guide/

[911hillclimber]

My just revised AV was with Hagerty on the phone with them @ £45k.
Think I'll stick with that.