Fortunatley they found nothing when they took off the bumper. Th crash bars inside showed that and there is a reasonable crumble zone on the bumper. If you have a look underneath, the plastic surround should be loose so you can have a peek behind to doublecheck. Looking at your damage they haven't gone too far in, unlike in mine where the dude caved the lot in, but even so there was no damage!! The tailgate was the same as yours just a little nudge on the lip, but when you had a look at the lines down the side and the top my was slightly out due to the impact, so had to get it changed. You may get away with it, however I personally preferred getting a brand new one plus the insurance company fully paid out as I was rear ended.
Will the car be A1, yes it will be fine. You haven't had a horredous smash that means a jig, a new diff or whatever, so crack on as normal when you get her back!
If your neck is sore then go to the doctors asap to get checked out and registered that it could be whiplash, therefore you can claim if you want. I didn't bother but a colleague who got sided one time did and claimed £3000.00 compo.
