The more I've seen that last video of him, the more convinced I am that he walked/trotted along in the shadows so as not to be seen and so making himself a bit less vulnerable. If he was that confident, why didn't he walk down the middle bit? Also, when he got to the end, where the post is, he appears to me to be going into a left turn, into SB, but stops, looks over to HS, checks around and goes for a tiddle. After that, with camera facing another direction, he goes over to SB loading bay and gets in a car that's already there. They go off elsewhere in BSE (I still have a party in mind) and later they leave and go to BM. His phone, could have been either lost wherever he was in BM area or maybe it was left in the car.