Thanks for all your help and suggestions.
I understand it may take some time to resolve, but 5 months it's a bit long.
I'll be definitely calling our insurer (which is Direct Line BTW) to resolve it ASAP.
If they won't be helpful - then yes, I think I'll be taking it to court. It has already cost me over £500!!
Where do I get eh other lady address from? Is the insurer obliged to give it to me on me request?