The whiplash claim will come - a few years ago my daughter ran into the back of a rep - bumper on her Corsa moved 15mm, so you can image it wasn't exactly a heavy shunt, no visible damage on the other car apart from a slight scuff. At the time the other driver was fine, no hassle etc. Discovered later he had claimed whiplash and was signed off work for a month! We wonder why insurance is so expensive.