Are we looking at the HS area from the wrong perspective ... we are concentrating on who/which vehicles have been seen entering or leaving. We have relied heavily on the police statement that it is not possible to leave the HS without being seen. But we have not concentrated on the fact that the bin area is not covered by CCTV. That is a fact that will be very evident to locals and while we are concentrating on what can be seen, the fact this area can't be seen will be known and used by those that wish to conduct 'business' privately. So while for us 'sleuths' debating cctv etc, there is actually a whole area within the HS that is hidden away from the prying eyes of cctv. I do not believe for one minute that C entered the HS to meet someone. While the police have concentrated on the movement of the phone via pings, they also know EXACTLY what he did or didn't use his phone for. Any calls, messages, internet traffic would have been logged and and that info accessed by the police long ago. So while we ponder did he or didn't he arrange a meet etc the police will know exactly what he accessed on his phone, calls made etc.
That is the reason police have requested info on 'strangers/randoms' ... they have no evidence of any contact via his phone/internet.
And that is why I think this is a wrong place/wrong time event. His evening was normal in that is included his regular visit to the kebab/burger place. He then sits down in a doorway to eat and falls asleep - all on CCTV ... the length of time he is asleep is random ... ie he could have napped for 10 minutes or two hours ... when he woke up ... it was at that point he entered the HS and disappeared into the bin area. If the police have evidence that contact via mobile useage was his reason for entering the HS, we would not have this hunting down of 'unknowns'. they would know exactly who he was meeting. Anyone that doesn't realise all phone useage and internet useage/ip adresses is not stored, is naive.
So that leaves us with an unplanned visit to the bin area ... a wee .. a push bike ??? I am not guessing ... but in that HIDDEN FROM CCTV bin area was someone or some people that were there for the exact reason it was private . and those same people would have known the CCTV system inside out ....