Yeah, reading back, I realise how confusing I made that! Sorry!
It's my neighbours car but I borrow and use it when it's available. (So it kind of feels like mine!) It's registered in their name as the second owners. It was purchased through a mutual friend of ours who's father owned it until he was too old to continue driving.
I don't think they have time in their busy lives to get it repaired but I want to make sure they're getting a fair price from the insurance company. It would be a shame to let it go though.
Thanks for the advice re: documentation. I'll pass it onto them.
Thanks