They are fixed cameras with a narrower vision than the Global camera sited in Limes car park that captured Alley person and so range is more limited.
I believe that Police know where Alleyperson went morning and night but they were putting the frighteners on Perps and also wanted someone to come forward and so "Thats our Fred"
Let me put it this way, could it be possible, in your opinion, for CL to be taken from the rear of Heworth Road, across the alley, directly into the back door of a property on Heworth Place, then out through the front door of heworth Place straight into a waiting car without being picked up by CCTV?
Obviously just mulling things over and speculation, no accusations. All IMO