Update, Finally got the assessor to approve the quote late yesterday so parts are now on order. Quarter panel to come from Japan so have been told (worst case) it could take 6-8 weeks. Rays been sent to be repaired, thankfully only scratches, no buckles. Chassis and all suspension checked out okay so that was good news.
For those unfortunate enough to find themselves in a similar situation and without their car whilst its been repaired, I was not aware but its a legal obligation for the party at faults insurer to pay for a hire car whilst yours is being repaired. Acorn Rentals is a company that handles this for you. A simple online form (providing you have full details of the party at fault) and they do the rest. Don't get tricked in to renting one yourself (if a hire car is not included in your policy) and then sending the claim to their insurer and hope (pray) they reimburse you! The wife just wanted a small 3-door like a Toyota Yaris but we got a free upgrade to a Nissan Duallis so very happy.
As for CDR, Nicole has been brilliant in keeping us informed with every development of our claim from their end. Extremely impressed with their customer service. I have every confidence in them restoring the coupe to its former glory and putting a simile back on my wife's face...she so misses her Skyline!