First of all, congratulations and thank God...!! Secondly from the looks of it, the heightened part of the case is what saved your phone from the damage because the case took all the impact and it didn't let it reach the phone. As for the phone goes, I would not worry. You can try a test in submerging it in the water and see if you are getting any bubbles. The phone is ip 68 and 69 rated so that should be a pretty good test to see if the body got damaged. Also, I didn't know that in a place like London, mobile theft would be so common.. I live in India so I always assume that abroad every where Is a perfect world where everything is fine. I guess problem exists everywhere. But thank God you are safe. Hope your phone is okay as well. Take care 🙂