So this saga appears to be coming to an end.
The car is now back with us and whoever did it, has done a fine job. Cant even tell that it was there! I checked to see whether its been a bumper change, but nope, I remember a light scratch on the bootlid which is still there so it appears its been repaired, rather than replaced! Either way, its a good job so I dont care!
Now, to claim that £450 excess from the 3rd party insurance company.....