Alex,
which insurance company is he with?
I repeat. DO NOT GIVE YOUR CAR TO THE INSURERS.
Get the quotes yourself, give them to the insurance company and make sure they go to your chosen repairer to asses to damage.
Don't go to their assesment places, as they often just take photos of the damage and ask panel beaters to quote on the e-mail, and then give the job to the cheapest, regardless of the work involved.
BASS OUT