Hay Chris, I had a look, your policy must be diffrent because from what I understand from my policy booklet (which is where I scanned the information from below) is that the agreed value is what the insurance company and myself have agreed on before the policy started, and is there for set in writing and cant be changed half way through the policy.
The only time the insurance company can allow market values to change the agreed value is at the beginning and the renewal of each policy – they can’t change the value half way through – well Just Car cant anyway – you insurer is probly different.
So yea, i sitck with what i said befor - Just Car has been pretty sweet so far